These are Questions of IAAS, TU BSc Ag Entrance Exams 2077 with Solutions. If you remember more Question post it in our FB group, we will add solutions to those questions too.
1. The new Height of Mount Everest was measure on date?
a. 08 December, 2020
b. 10 December, 2020
c. 12 December, 2020
d. 14 December, 2020
Answer: A.
The 8,848m height Nepal had been using for Mount Everest was determined by the Survey of India in 1954, but for the first time the country has now conducted its own measurement of the summit.Nepal and China on Tuesday jointly announced that the revised height of the world's highest peak Mount Everest was 8,848.86 metres, about 86 centimetres more than the previous measurement done by India in 1954.
2. Corona Virus was declared pandemic by UN on which date?
The World Health Organization (WHO) on March 11, 2020 declared COVID-19 a pandemic, pointing to the over 118,000 cases of the coronavirus illness in over 110 countries and territories around the world and the sustained risk of further global spread.3. Largest Landlocked country is?
a. Lesbia
b. Vietnam
c. Sudan
d. Mongolia
Answer: D
The largest country with no border-access to the open ocean is Kazakhstan, which has an area of 2,724,900 km² (1,052,100 mile²) and is bordered by Russia, China, Kyrgystan, Uzbekistan, Turkmenistan, and the landlocked Caspian Sea. The world has a total of 43 landlocked countries. Mongolia is the second largest landlocked country in the world with a total area of 1,566,500 km². Mongolia is located in northern Asia bordering 2 countries China and Russia. The population of the country is 3 million people.
So if there was Kazakhstan then it would be the answer.
4. Species listed in Red Data Book are
a. Vulnerable
b. Threatened
c. Endangered
d. All of the above
a. Vulnerable
b. Threatened
c. Endangered
d. All of the above
OR
a) all plant species
b) all animal species
c) economically important species
d) threatened species
Answer: D for Both questions.
The species (including animals, plants, fungi, etc.) which are vulnerable to endangerment in the near future are known as threatened species. The International Union for Conservation of Nature (IUCN) is the authority on threatened species, and it treats threatened species as a group of three categories, depending on the degree relative to which they are threatened. Those categories are Vulnerable species; Endangered species and Critically endangered species. As per the Red list of 2000, there are 11,096 threatened species.5. A female goat is also called ________________________?
A. Buck
B. Doe
C. Ram
D. None of above
A. Buck
B. Doe
C. Ram
D. None of above
Female goats are called “Nannies” or “Does” A baby goat is called a “Kid” A male goat is called a “Buck”
6. Red revolution is related to ___.
a. Milk Production
b. Meat Production
c. Cotton production
d. Fruits Production
a. Milk Production
b. Meat Production
c. Cotton production
d. Fruits Production
Answer: B Meat Revolution or Tomato Production.
Hint in the Photo Below:
7. Ruminant animal among the following is?
a. Elephant
b. Cow
c. Horse
d. Pig
Answer: B
Ruminant animals are herbivores with a complex stomach called a rumen. Some examples of ruminant animals are cattle, sheep, goats, buffalo, deer, elk, giraffes and camels. One of the most significant features of the ruminant digestive system is the presence of a complex stomach with four compartments. They are rumen, reticulum, omasum, and abomasum. The first three compartments, the rumen, reticulum, and omasum break down plant fibers by fermentation with the help of microflora. This fermentation results in volatile fatty acids such as acetate, butyrate, and propionate. Hence, this process is called the foregut fermentation. The forth compartment secretes digestive enzymes.Non-ruminant animals are omnivores or carnivores with a single stomach compartment within the digestive system. Hence, the digestive system of the non-ruminant animals is called monogastirc. Some examples of non-ruminant animals are human, horse, swine, fowl, dog, and rabbit. The components of the non-ruminant digestive system are mouth, esophagus, stomach, small intestine, large intestine, and rectum.
Examples:
Some ruminant animals include cattle, sheep, goats, buffalo, deer, elk, giraffes and camels while non-ruminant animals include human, horse, swine, fowl, dog, and rabbit.
8. The slag obtained during extraction of Iron is used as
a. Fertilizer
b. Germicide
c. Hormone
d. Bactericide
Answer: A
During extraction of iron, soda time is added in furnace because it combines with gangue to form slag.CaO + SiO2 → CaSiO3 used as Fertilizer.
Basic Acidic Slag
9. Reagent which can distinguish propanal and propanone is?
a. Tollen's reagentb. Benedict's reagent
c. Fehling's reagent
d. All of these
Answer: D
Tollen's reagent, Bennedict solution and Fehling solution are all used to distinguish between aldehydes and ketones. Propanal (CH3CHO) is an aldehyde and thus gives positive test with all the three reagents whereas propanone (CH3COCH3) is a ketone and thus does not give any results with the three reagents.10. Phenol in presence of sodium hydroxide reacts with chloroform to form salicyladehyde. The reaction is known as:
A. Kolbe's reactionB. Reimer-Tiemann reaction
C. Stephen reaction
D. Etard reaction
Answer: B
Phenol in presence of sodium hydroxide reacts with chloroform to form salicyladehyde. The reaction is known as Reimer-Tiemann reaction.11. In Dahlia, the roots are
A. FibrousB. Stilt
C. Moniliform
D. Fasciculated tuberous
Answer: D
In Dahlia, the roots are fasciculated tuberous roots because the fibrous root system of the plant stores food in them for perennation converting them into a tuft of tubers.12. Algae found in snow is called?
13. Golden age of dinosaurs was during
A. Coenozoic era
B. Palaeozoic era
C. Archeozoic era
D. Mesozoic era
A. Coenozoic era
B. Palaeozoic era
C. Archeozoic era
D. Mesozoic era
Answer : D
The Mesozoic Era is literally the era of middle life. It is also known as the age of dinosaurs. It lasted from 245 to 65 million years ago and is divided into the three periods. The Mesozoic began with the supercontinent Pangaea. Then, during the era, Pangaea broke up and the continents drifted apart. The movement of continents changed climates. It also caused tremendous volcanic activity. Mass extinctions occurred at the end of the Triassic and Cretaceous Periods. The first extinction paved the way for a dinosaur takeover. In the second extinction, the dinosaurs finally disappeared. 14. Peripatus is the connecting link between
A. Molluscs and arthropodsB. Reptiles and mammals
C. Annelids and arthropoda
D. Annelida and helminthes
Answer: C. Remember as PAA.
Peripatus is the connecting link between Annelida and Arthropoda.Some Annelidan characters of Peripatus are:
1. Presence of thick cuticle.
2. Presence of simple eyes.
3. Body is pseudosegmented and worm-like.
4. An excretory organ is nephridia.
Some Arthropod characters of Peripatus are:
1. Presence of antennae.
2. The trachea is the respiratory organ.
3. Presence of clawed and pseudosegmented walking legs.
15. Pseudocoelom is found in
a. Protozoa
b. Coelenterata
c. Nemathelminthis
d. Platyhelminthis
Answer: C
Pseudocoelom (false body cavity) is found in Ascaris (phylum Nematohelminthes or Aschelminthes).Pseudocoelom is a fluid-filled body hole extending inside the outside body wall of the nematode. Pseudocoelom is not completely lined with the mesodermal tissue. It washes the internal organs like the digestive system and the procreative system.
Nematodes are, infact, most diverse phylum of pseudocoelomates.
16. Upper jaw is formed by
a. Mandible
b. Maxilla
c. Dentine
d. Acetabulum
Answer: B
The maxilla is the bone that forms your upper jaw. The right and left halves of the maxilla are irregularly shaped bones that fuse together in the middle of the skull, below the nose, in an area known as the intermaxillary suture. The maxilla is a major bone of the face.The two maxillary bones are fused at the intermaxillary suture, forming the anterior nasal spine. This is similar to the mandible (lower jaw), which is also a fusion of two mandibular bones at the mandibular symphysis. The mandible is the movable part of the jaw.
17. Metameric segmentation is the characteristic of
A. PlatyhelminthesB. Echinodermata
C. Annelida
D. Mollusca
Answer: C
Metamerism is the phenomenon in which the body of organisms is constructed into a linear series of body segments. Organs and tissues in the body of such organisms are found to be repeated after regular intervals (segments) and each segment is known as a metamere or somite. This is seen mainly in annelids and is also found in arthropods. So, the correct answer is ' annelida and arthropoda'.18. Hydra can digest all types of food except
A. ProteinsB. Fats
C. Starch
D. None of the above
Answer: C
Hydra can digest proteins, fats, and some carbohydrates, but it does not digest starch because they lack salivary amylase and pancreatic amylase.19. The insect, which lays eggs in water, is____________
A. ButterflyB. Housefly
C. Dragonfly
D. Sandfly
Answer: C
Dragonflies and damselflies are especially vulnerable to predators while they are in the egg or nymph stage. Once, they become airborne they are harder to catch. In the water, they are preyed on by fish, water beetles, frogs and other carnivorous water species.20. RBCs are nucleated in
A. ManB. Rabbit
C. Rat
D. Frog
Answer: D
RBCs are type of blood cells, which contains hemoglobin, thereby transports oxygen in blood. It lacks nucleus in mammals (man, rabbit and rat) but it is nucleated in frog. 21. Which of the following are Lewis acid?
A. PCl3B. AlCl3
C. NCl3
D. NH3
Answer: B
BF3 and AlCl3 are electron deficient compounds and are Lewis acids. PCl3 and NCl3, NH3 are Lewis bases.
22. Soft drinks bottles and baby feeding bottles are generally made up of ____.
A. polyesterB. polyurethane
C. polystyrene
D. polyamide
Answer: C
Polystyrene is a synthetic aromatic polymer made from monomer styrene. It is a thermoplastic polymer. It is used as soft drinks and baby feeding bottles because it can be easily moulded and fine details can be printed on it.23. Hydration energy is greater than Lattice energy in
a. AgF
b. AgCl
c. AgBr
d. AgI
Answer: D
Hydration energy is inversely proportional to Size.
24. Bernoulli's theorem is based on the conservation of _______.
A. EnergyB. Mass
C. Momentum
D. All of these
Answer: A
Bernoulli's principle is based on conservation of the Total Mechanical Energy.25. An isolated conducting sphere is given positive charge. It's mass:
A. remains unchangedB. increases
C. decreases
D. may increase or decrease
Answer : C
26. Lenz's law is a consequence of law of conservation of
A. Energy onlyB. Charge only
C. Momentum only
D. Energy and momentum
Answer: A
Lenz's law is based upon the law of conservation of energy. Lenz law states that the induced current always tends to oppose the cause which produce it. So in order to do work against opposing force we have to put extra effort. This extra work leads to periodic change in magnetic flux hence more current is induced. Thus the extra effort is just transformed into electrical energy which is law of conservation of energy.27. If the momentum of a body is doubled, the kinetic energy :
A. is halvedB. is unchanged
C. is doubled
D. becomes 4 times
Answer: D
Momentum is directly proportional to velocity. If momentum of an object is doubled , but its mass does not increase (so velocity remains below the speed of light) then its velocity is doubled. If the velocity is doubled, then the kinetic energy increases by four times.28. Two bodies of mass 4kg and 6kg are tied to the ends of a massless string. The string passes over a pulley which is frictionless. The acceleration of the system in terms of acceleration due to gravity (g) is :
a. g
b. g/2
c. g/5
d. g/10
Answer: C
The force balancing equation for 4 kg block is:T−4g=4a
Simplify for T:
T=4(a+g)
On the other hand, the expression for 6 kg block is:
6g−T=6a
Substitute the value of T in above expression:
6g−4(a+g)=6a
2g−4a=6a
a=2g/10
→a=g/5
29. I H.P. is equal to
A. 1WB. 1J
C. 746 J
D. 746 W
Answer: D
1 H.P. is equal to 746W.
30. A drop of water is always spherical due to:-
A. Viscosity
B. Surface tension
C. Atmospheric pressure
D. Gravity
A. Viscosity
B. Surface tension
C. Atmospheric pressure
D. Gravity
Answer : B
The cohesive forces between liquid molecules is responsible for the surface tension. The molecules of water on the surface don't have like molecules around it. So the water droplets tend to be pulled into shape of spherical due to cohesive forces. That's why, the drop of water is always spherical.31. Air friction …… the velocity of the satellite?
a. Decreases
b. Increases
c. Remains unchanged
D. None of them
Answer: B
Inverse in velocity is because due to friction the orbital velocity of satellite decrease and it starts to fall. Hence speed increases.As the air friction causes the retarding torque, it will decrease the angular momentum L of the satellite. Because of this the velocity of the satellite v increase in order to keep Lv=a constant.
32. Pyrometer is used to measure
a. High temperature
b. Cold temperature
c. Room temperature
d. All of them
Answer: A
An instrument used to measure high temperature is Pyrometer.Pyrometer is used to measure high temperature in furnace. It is a type of remote sensing thermometer used to measure temperature for surface.
33. If the magnitude of sum of two vectors is equal to the magnitude of difference of the two vectors, the angle between these vectors is … degree.
A. 180B. 0
C. 90
D. 45
Answer: C
a. MLT-1
b. LT-2
c. MT-1
d. None of them
Answer: D
Angular displacement= Length/RadiusNow we know
Dimensional Formula of Length = M0L1T0
Dimensional Formula of Radius = M0L1T0 —- Radius is related to length.
So
Angular displacement= M0L1T0/M0L1T0
Hence Dimensional Formula of Angular displacement = M0L0T0
SI units of Angular displacement is radian.
34. The structure of PCl5 is:
A. Trigonal bipyramidalB. Octahedral
C. Pentagonal bipyramidal
D. Square pyramidal
Answer: A
35. A metal never found in free state is:
A. AuB. Ag
C. Cu
D. Zn
Answer: D
gold(Au), silver(Ag), Copper(Cu) and Platinum(Pt) are noble metals and occurs in nature in free state. Therefore, Zn does not occur in the free state.
36. The roots of ax2+bx+c=0,a=0 are real and unequal, if b2−4ac is ___________.
A. ≥0B. > 0
C. < 0
D. None of these
Answer: B
The roots of the equation are For the equation to have real roots, For the equation to have unequal roots,
37. Algae differ from bryophytes in having
A. Chlorophyll a and bB. Naked sex organs
C. Jacketed sex organs
D. Aerobic respiration
Answer: B
The main difference between algae and bryophytes is the division of the plant body; Algae: Algae can be unicellular or multicellular and filamentous. Algae: Sterile jacket is not found covering sex organs of algae. In the past, most studies have focused on the role of the cellulose/xyloglucan.38. Oldest Highway of Nepal is
a. Tribhuwan Highway
b. Prithivi Highway
c. Siddhartha Highway
d. Araniko Highway
Answer: A
Tribhuvan Highway Known informally as Byroad, the Tribhuvan Highway is the oldest of Nepal's highways and links Naubise, 25 kilometres (16 mi) west of Kathmandu with the Indian border at Birganj/Raxaul. It was named in memory of King Tribhuvan (1906–1955).39. The lightest element in the world is?
A. OxygenB. Helium
C. Hydrogen
D. Chlorine
Answer: C
Hydrogen is the simplest and lightest element and the most common in the entire universe.Since hydrogen atom has only 1 electron and 1 proton, total mass of hydrogen is smallest. Thus, hydrogen is the lightest element and Lithium is lightest metal.
A. Testis with epididymis
B. Kidneys with epididymis
C. Testes with urinogenital ducts
D. None of the above
Answer: A
The testis is the primary sex organ in males. Each testis has 250 testicular lobules. Each lobule has 1-3 highly coiled seminiferous tubules. These seminiferous tubules open into the vasa efferentia through rete testis. The vasa efferentia opens into the epididymis which continues to form the vas deferens. Vas deferens transfers the sperms mixed with semen to the ejaculatory duct. So vasa efferentia is the connecting link between testis and epididymis.
41. f(x) = sin x (1 + cosx) has maximum value at x=
A. 0B. π
C. π/3
D. 1
Answer: C
42. Study and cultivation of vegetables is called as
A. AgricultureB. Horticulture
C. Apiculture
D. Olericulture
Answer: D
The study of the vegetables and its cultivation is known as olericulture. The different types of vegetables and the different parameters during the process of cultivation are studied. The prime factors are the season of sowing, flowering, harvesting, water requirement, etc., are taken into consideration. 43. Antonym for the following word from the options given below: CONCEAL
A. RevealB. Disclose
C. Confess
D. Contend
D. Contend
Answer: B
Antonyms are words that have contrasting, or opposite, meanings.
Choice A is correct. Disclose means 'to reveal' the opposite being 'conceal' meaning 'not to show'. For example: A line of buildings concealed the sea shore. Choice B means the same as 'disclose' Choice C means 'to tell the truth' Choice D means 'struggle or surmount and difficulty. Choice B, C and D are wrong.
Choice A is correct. Disclose means 'to reveal' the opposite being 'conceal' meaning 'not to show'. For example: A line of buildings concealed the sea shore. Choice B means the same as 'disclose' Choice C means 'to tell the truth' Choice D means 'struggle or surmount and difficulty. Choice B, C and D are wrong.
44. Yeast is included in fungi and not Protista because :
A. It has eukaryotic organization.B. Chlorophyll is absent.
C. It forms pseudomycelium.
D. Cell wall has cellulose and food reserve as starch
Answer: C
Yeasts exhibits pseudomycelial growth which is absent in protista. So they are not included in protista and are include in fungi.45. Adam's ale
A. GraceB. Pleasure
C. Water
D. Wine
Answer: Option C
"Adam's ale" means unadulterated water, based on the presumption that the biblical first man Adam had only water to drink in the Garden of Eden. Common variations are "Adam's wine" in Scotland, and sometimes simply "Adam". The phrase is an allusion, colloquialism, epithet, and idiom.
46. Antiderivative of Log x is:
a. Log x
b. xlogx + x + C
c. xlogx - x + C
d. None of them
Answer : C
47. Small insects such as the water strider can walk on water due to which phenomenon (Choose the best one).
A. viscosityB. surface tension
C. friction
D. None of these
Answer: B
The surface of any body in water behaves as though it is covered with an invisible skin, which allows small, light-weight insects to walk across it. This skin effect is caused by surface tension. Like molecules are attracted to each other. They like to “stick together” and this attractive force is known as cohesion.48. Similarity between man and earthworm is
A. Both are nephrotelicB. Both are ammonotelic
C. Both are ureotelic
D. Both are uricotelic
Answer: C
Ureotelic organisms are those that excretes excess nitrogen as urea. Urea is their major excretory product. Earthworms and humans both excrete urea as a major excretory product. So, they both are ureotelic. Ammonotelic and uricotelic organisms excrete excess nitrogen as ammonia and uric acid respectively. So, the correct answer is option C.49. Suitable and most common method of Propagation of Litchi is
a. stem cutting
b. air layering
c. grafting
d. seed
Answer: B
The most commonly used commercial method of propagation of litchi is air layering. Litchis can also be propagated by seeds, grafting or cuttings. The highly heterozygotic characteristic of this species prevents the commercial propagation by seeds.50. Flying Frog is ____________.
A. HylaB. Rhacophorus
C. Alytes
D. Pipa pipa
Answer: B
The flying frog is a frog that has the ability to achieve gliding flight. It belongs to the genus Rhacophorus.It can descend at an angle of fewer than 45 degrees relative to the horizontal. Bufo is the genus of true toads. Phyllobates is a genus of dart frog. Necturus is a genus of aquatic salamander.
Tree frog : Hyla
Midwife Toad : Alytes
51. Epigynous/Hypogynous are character of
a. Ovary
b. Androecium
c. Corolla
d. Flower
Answer: D
The flower is said to be hypogynous if sepals, petals and stamens are inserted below the ovary.In perigynous flowers the thalamus forms a cup-shaped structure around the ovary, and sepals, petals and stamens appear to be inserted on the rim of the cup.
When the thalamus completely encloses the ovary and fuses with the ovary wall and sepals, petals and stamens seem to arise above the ovary, the flower is said to be epigynous.
52. 'Bordeaux mixture' is used as a fungicide. It is a mixture of:
A. CaSO4 + Cu(OH)2B. CuSO4 + Ca(OH)2
C. CuSO4 + CaO
D. CuO + CaO
Answer: B
Bordeaux mixture (also called Bordo Mix) is a mixture of copper(II) sulfate (CuSO4) and slaked lime (Ca(OH)2) used as a fungicide.
The bordeaux mixture emerged in 1885 and continued to be the effective and most important successful fungicide. It is used by mixing of copper sulfate and slaked lime.53. N/C has dimension similar to
a. Farad/meter
b. Volt/meter
c. Farad meter
d. Volt meter
Answer: B
Newton Per Coulomb ( N/C) is a unit in the category of Electric field strength. It is also known as newtons/coulomb. Newton Per Coulomb ( N/C) has a dimension of MLT-3I-1 where M is mass, L is length, T is time, and I is electric current. It essentially the same as the corresponding standard SI unit V/m.54. Most dangerous Pesticide has which colour label?
A. Green
B. Blue
C. Red
D. Yellow
Answer: C
Toxicity labels viz; red label, yellow label, blue label and green label are mandatory labels employed on pesticide containers. Red is most dangerous and Green is least one.
55. What is the difference between soft and hard X-ray?
A. VelocityB. Intensity
C. Frequency
D. Polarization
Answer: C
Frequency of hard X−rays is greater than that of soft X−rays. Wavelength is better answer if available in options.56. One who hates mankind
A. Philanthropist
B. Misanthrope
C. Hater
D. Rebel
A. Philanthropist
B. Misanthrope
C. Hater
D. Rebel
Answer: B
Option A; Philanthropist is a person who seeks to promote the welfare of others. This is not the word which means the aforesaid and hence this is an incorrect option.Option B; Misanthrope is a person who dislikes humankind and avoids human society. This word exactly means what is mentioned above and hence is the correct option.
Option C; Hater is a person who greatly dislikes a specified person or thing and not mankind in particular and hence this not the correct word. Therefore this option is incorrect.
Option D; Rebel is a person who rises in opposition against any established institution. This does not mean the same as the given word and hence this is an incorrect option.
57. When water is heated from 0∘C to 10∘C its volume.
A. Decreases continuouslyB. First decreases and then increases
C. First increases and then decreases
D. Increases continuously
Answer: B
From water at 0°C to water at 4°C, on addition of heat, the water surprisingly, contracts till it reaches maximum density at 4°C. This negative thermal expansion is termed as the anomalous expansion of water.From water at 4°C to water at 10°C, water shows a positive cubical thermal expansion like other substances and gradually expand with the increase in temperature.
58. The viruses contain
A. Proteins onlyB. DNA only
C. Nucleic acids only
D. Proteins, DNA or RNA (nucleic acids)
Answer: D
Viruses are ultramicroscopic and can cause diseases in plants and animals. They are very simple in their structure. They are composed of nucleic acid surrounded by a protein coat. The nucleic acid can be either RNA or DNA, but never both. Viruses have either RNA or DNA as their genetic material. The nucleic acid may be single- or double-stranded. The entire infectious virus particle, called a virion, consists of the nucleic acid and an outer shell of protein. The simplest viruses contain only enough RNA or DNA to encode four proteins.59. Who is known as the 'father of genetics'?
A. DarwinB. Lamarck
C. Mendel
D. Morgan
Answer: C
Gregor Mendel is known as the Father of Genetics. He worked on pea plants and discovered the fundamental laws of inheritance. His three laws are the law of dominance, the law of segregation and the law of independent assortment.
He deduced that genes come in pairs and are inherited as distinct units, one from each parent.
60. Derivative of constant term is
a. > 0
b. < 0
c. 0
d. None of them
Answer: C
The derivative of any constant term is 0, according to our first rule. This makes sense since slope is defined as the change in the y variable for a given change in the x variable.A. Sugar and oxygen
B. Water and energy
C. Carbon dioxide, water and energy
D. Carbon dioxide and energy
Answer: C
Aerobic respiration is the complete oxidation of sugars in presence of oxygen.The carbohydrates are broken down into CO₂ and H₂O and this releases energy. This energy is stored in the form of ATP and later used in the body.
62. The art of beautiful handwriting
A. Paleography
B. Calligraphy
C. Draftsman
D. Painter
A. Paleography
B. Calligraphy
C. Draftsman
D. Painter
Answer: B
Option A - 'Paleography' is the study of ancient writing systems. Thus option A is incorrect.Option C - 'Draftsman' is someone who writes legal documents. Thus option C is incorrect.
Option D - 'Painter' is someone who paints pictures. Thus option D is incorrect.
Option B - 'Calligraphy' is the art of beautiful handwriting. 'The art of beautiful handwriting - Calligraphy'
63. Maximum value of sinx − cosx is equal to
A. Root under 2
B. 1
C. 0
D. None of these
B. 1
C. 0
D. None of these
Answer: A
64. The correct order of increasing thermal stability of K2CO3, MgCO3, CaCO3 and BeCO3 is:
A. K2CO3 < MgCO3 < CaCO3 < BeCO3B. BeCO3 < MgCO3 < K2CO3 < CaCO3
C. BeCO3 <MgCO3 < CaCO3 < K2CO3
D. MgCO3 < BeCO3 < CaCO3 < K2CO3
Answer : C
The thermal stability of carbonates increases in a group, as we move from top to bottom and decreases in a period as we move from left to right. In the above set, Be, Mg, Ca is present in second group, K is present in first group. So, the correct order of increased thermal stability is: BeCO3<MgCO3<CaCO3<K2CO3.
65. The angle of projection at which the horizontal range and maximum height of projectile are equal is
A. 45B. θ=tan^-1(0.25)
C. θ=tan^-1(4) or θ=70
D. 60
Answer: C
66. Which of the following animal phyla does not possess a coelom?
A. PlatyhelminthesB. Annelida
C. Mollusca
D. Echinodermata
Answer: A
Flatworms are acoelomates that are characterized by having three germ layers (ectoderm, mesoderm, and endoderm) and lacking respiratory and circulatory systems. Acoelomates are invertebrates that do not have a coelom, or body cavity. With about 25,000 known species, flatworms are the largest phylum of acoelomates. Platyhelminths are thought to be the first invertebrates to have a third germ layer, the mesoderm.67. Paramecium reproduces by
A. Transverse Binary fissionB. Radial fission
C. Elongated fission
D. Longitudinal fission
Answer: A
Paramecium, like other ciliates, usually reproduces by splitting in two, forming two virtually identical individuals from one organism. Most ciliates divide transversely, splitting in two by pinching off in the middle of the long axis of the organism, as can be seen in the photo. The macronucleus does not divide by mitosis, rather it elongates and then splits in two, roughly one half going to the each of the new daughter cells. This type of reproduction involves no exchange of genetic material and is a type of asexual reproduction. This form of asexual reproduction is often called as fission.68. When the margins of sepals or petals overlap one another without any particular direction the condition is termed as
A. ImbricateB. Twisted
C. Valvate
D. Vexillary
Answer: A
Aestivation refers to the arrangement of the petals or sepals in a flower.A. When the margins of the sepals or petals overlap one another without any particular direction, it is called imbricate. Example Cassis.
B. When the margins of the sepals or petals overlap one another regularly in the particular direction, it is called twisted, example, China Rose.
C. When the margins of the sepals or petals do not overlap one another, it is called valvate, example Calotropis.
D. When the petals are of different sizes and show descending imbricate pattern, it is called vexillary, example, pea.
69. A body at rest may have
A. EnergyB. Momentum
C. Speed
D. Velocity
Answer: A
If Body is at rest , that means velocity is zero so speed is also zero.v=0, KE=0
Body at rest may possess potential energy, due to it's height or other reason.
70. Histogen theory states that epidermis is derived from the
A. PeriblemB. Cambium
C. Cortex
D. Dermatogen
Answer: D
According to histogen theory by Hanstein, the three principal tissues of the root, vascular cylinder, cortex and epidermis originate from three groups of initial cells or histogens, in the apical meristem plerome, periblem and dermatogen respectively. A fourth histogen, the calyptrogen produces the root cap. 71. The metaxylem in angiospermic wood is
a. Centripetal
b. Centrifugal
c. Both of them
d. None of them
Answer: B
When the xylem develops from the outside inwards towards the center, i.e., centripetally, it is called as exarch. When xylem develops from the inside outwards towards the periphery, i.e., centrifugally, it is called as endarch.Exarch is used when there is more than one strand of primary xylem in a stem or root, and the xylem develops from the outside inwards towards the centre, i.e., centripetally. The metaxylem is thus, closest to the center of the stem or root and the protoxylem closest to the periphery. The roots of vascular plants are normally considered to have exarch development. Endarch is used when there is more than one strand of primary xylem in a stem or root, and the xylem develops from the inside outwards towards the periphery, i.e., centrifugally. Mesarch is used when there is more than one strand of primary xylem in a stem or root, and the xylem develops from the middle of a strand in both directions.
72. Nationwide is:
a. Adjective
b. Adverb
c. Verb
d. Noun
Answer: B
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