Biology
1. Which of the following is correct about viroids? 2. Which of the following pairs is of unicellular algae? 3. Floridean starch has structure similar to 4. Strobili or cones are found in 5. Bilaterally symmetrical and acoelomate animals are exemplified by 6. Which of the following statements are true for the phylum-Chordata (i) In Urochordata notochord extends from head to tai 7. If the head of cockroach is removed, it may live for few days because 8. Match the following columns and select the correct option :
.tg {border-collapse:collapse;border-spacing:0;}
.tg td{bo 9. Match the following columns and select the correct option :
.tg {border-collapse:collapse;border-spacing:0;}
.tg td{bo 10. Ray florets have 11. The ovary is half inferior in: 12. Identify the incorrect statement. 13. The roots that originate from the base of the stem are 14. The transverse section of a plant shows following anatomical features :
(i) Large number of scattered vascular bundles 15. Cuboidal epithelium with brush border of microvilli is found in 16. Which of the following statements about inclusion bodies is incorrect? 17. Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells? 18. Identify the substances having glycosidic bond and peptide bond, respectively in their structure 19. Which one of the following is the most abundant protein in the animals? 20. Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G0). This p 21. Match the following with respect to meiosis
(A) Zygotene (i) Terminalization
(B) Pachytene 22. Dissolution of the synaptonemal complex
occurs during 23. In light reaction, plastoquinone facilitates the
transfer of electrons from 24. The oxygenation activity of RuBisCo enzyme
in photorespiration leads to the formation of 25. The number of substrate level phosphorylations
in one turn of citric acid cycle is 26. Which of the following is not an inhibitory
substance governing seed dormancy? 27. Name the plant growth regulator which upon
spraying on sugarcane crop, increases the
length of stem, thus increasing the 28. Select the correct events that occur during
inspiration.
(i) Contraction of diaphragm
(ii) Contraction of external inter 29. Identify the wrong statement with reference to
transport of oxygen. 30. Match the following columns and select the
correct option.
Column-I
Column-II
(a) Eosinophils
31. The QRS complex in a standard ECG represents 32. Presence of which of the following conditions
in urine are indicative of Diabetes Mellitus? 33. Which of the following would help in
prevention of diuresis? 34. Match the following columns and select the
correct option.
Column-I
Column-II
(a) Floating Ribs 35. Match the following columns and select the
correct option.
Column-I
Column-II
(a) Organ of Cor 36. Match the following columns and select the
correct option
Column-I
Column-II
(a) Pituitary glan 37. Select the correct statement 38. The body of the ovule is fused within the
funicle at 39. The plant parts which consist of two generations
- one within the other(i) Pollen grains inside the anther
(ii) Germinat 40. Meiotic division of the secondary oocyte is
completed 41. Which of the following hormone levels will
cause release of ovum (ovulation) from the
graffian follicle? 42. Match the following columns and select the
correct option.
Column-I
Column-II
(A) Placenta
43. Select the option including all sexually
transmitted diseases. 44. In which of the following techniques, the
embryos are transferred to assist those females
who cannot conceive? 45. Experimental verification of the chromosomal
theory of inheritance was done by 46. Embryological support for evolution was
disapproved by 47. Select the correct match 48. If the distance between two consecutive base
pairs is 0.34 nm and the total number of base
pairs of a DNA double helix i 49. Which of the following statements is correct? 50. The first phase of translation is 51. From his experiments, S.L. Miller produced
amino acids by mixing the following in a
closed flask 52. Flippers of Penguins and Dolphins are
examples of 53. Which of the following refer to correct
example(s) of organisms which have evolved
due to changes in environment brought 54. Match the following diseases with the causative
organism and select the correct option
Column-I
Column-II
55. The infectious stage of Plasmodium that enters
the human body is 56. Identify the wrong statement with reference to
immunity 57. Which of the following is put into Anaerobic
sludge digester for further sewage treatment? 58. Match the following columns and select the
correct option.
Column-I
Column-II
(a) Clostridium 59. In gel electrophoresis, separated DNA fragments
can be visualized with the help of 60. Bt cotton variety that was developed by
the introduction of toxin gene of Bacillus
thuringiensis (Bt) is resistant to 61. Identify the wrong statement with regard to
Restriction Enzymes 62. The specific palindromic sequence which is
recognized by EcoRl is 63. The sequence that controls the copy number of
the linked DNA in the vector, is termed 64. Match the organism with its use in biotechnology
(a) Bacillus thuringiensis
(i) Cloning vector
(b 65. Which of the following statements is not
correct? 66. Match the following columns and select the
correct option.
Column-I
Column-II
(a) Bt cotton
67. The process of growth is maximum during 68. Secondary metabolites such as nicotine,
strychnine and caffeine are produced by plants
for their 69. Which of the following is not an attribute of a
population? 70. In relation to Gross primary productivity and
Net primary productivity of an ecosystem,
which one of the following state 71. Match the trophic levels with their correct species
examples in grassland ecosystem.
(A) Fourth trophic level   72. According to Robert May, the global species
diversity is about 73. Which of the following regions of the globe
exhibits highest species diversity? 74. Match the following
(a) Inhibitor of
catalytic activity
(i) Ricin
(b) Possess peptide bonds
75. Identify the wrong statement with reference to
the gene ‘I’ that controls ABO blood groups. 76. Choose the correct pair from the following 77. How many true breeding pea plant varieties
did Mendel select as pairs, which were similar
except in one character with c 78. Name the enzyme that facilitates opening of
DNA helix during transcription. 79. Identify the basic amino acid from the
following 80. Identify the correct statement with regard to
G1 phase (Gap 1) of interphase
Chemistry
1. Hydrolysis of sucrose is given by the following reaction.Sucrose + H2O ⇌
Glucose + FructoseIf the equilibrium constant ( 2. Which one of the following has maximum number of atoms? 3. Which of the following is not correct about carbon monoxide? 4. The calculated spin only magnetic moment of Cr2+ ion is? 5. Which of the following is a basic amino acid? 6. Paper chromatography is an example of : 7. For the reaction, 2Cl(g) $$ \to $$ Cl2(g), the correct option is : 8. Urea reacts with water to form A which will decompose to form B. B when passed through Cu2+ (aq), deep blue colour solut 9. On electrolysis of dil. sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be : 10. An increase in the concentration of the reactants of a reaction leads to change in : 11. Which of the following alkane cannot be made in good yield by Wurtz reaction? 12. Identify the incorrect statement. 13. A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following? 14. Which of the following is the correct order of increasing field strength of ligands to form coordination compounds? 15. Which of the following set of molecules will have zero dipole moment? 16. Match the following and identify the correct option.
(A)
CO(g) + H2(g)
(i)
Mg(HCO3)2 + Ca(HCO3)2
17. The number of protons, neutrons and electrons in 17571Lu, respectively, are : 18. The number of Faradays(F) required to produce 20 g of calcium from molten CaCl2 (Atomic mass of Ca = 40 g mol-1) is : 19. Elimination reaction of 2-Bromo-pentane to form pent-2-ene is :(A) $$\beta $$-Elimination reaction(B) Follows Zaitsev ru 20. Identify the correct statements from the following :(A) CO2(g) is used as refrigerant for ice-cream and frozen food.(B) 21. Identify the incorrect match.
Name
IUPAC Official Name
(A)
Unnilunium
(i)
22. The freezing point depression constant (Kr) of benzene is 5. 12 K kg mol-1. The freezing point depression for the soluti 23. What is the change in oxidation number of carbon in the following reaction?CH4(g) + 4Cl2(g) $$ \to $$ CCl4(l) + 4HCl(g) 24. The rate constant for a first order reaction is 4.606 $$ \times $$ 10-3 s-1. The time required to reduce 2.0 g of the re 25. The mixture which shows positive deviation from Raoult's law is : 26. Which of the following oxoacid of sulphur has $$ - $$
O$$ - $$
O$$ - $$
linkage? 27. Sucrose on hydrolysis gives : 28. Find out the solubility of Ni(OH)2 in 0.1M NaOH. Given that the ionic product of Ni(OH)2 is 2 $$ \times $$ 10-15. 29. The correct option for free expansion of an ideal gas under adiabatic condition is : 30. Which of the following amine will give the carbylamine test? 31. Identify compound X in the following sequence of reactions : 32. Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as : 33. Identify a molecule which does not exist. 34. As alkene on ozonolysis gives methanal as one of the product, Its structure is : 35. Anisole on cleavage with Hl gives : 36. Match the following :
Oxide
Nature
(A)
CO
(i)
Basic
(B)
BaO 37. Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give :
Physics
1. Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of telescope whose objective has a 2. A short electric dipole has a dipole moment of 16 $$ \times $$ 10-9 Cm. The electric potential due to the dipole at a po 3. A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A) and emerges n 4. A body weighs 72 N on the surface of the earth. What is the gravitational force on it, at a height equal to half the rad 5. For which one of the following, Bohr model is not valid? 6. A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capi 7. A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular scale.The pitch of the screw gauge i 8. An iron rod of susceptibility 599 is subjected to a magnetizing field of 1200 A m-1. The permeability of the material of 9. The phase difference between displacement and acceleration of a particle in a simple harmonic motion is : 10. The energy equivalent of 0.5 g of a substance is : 11. A resistance wire connected in the left gap of a metre bridge balances a 10 $$\Omega $$
resistance in the right gap at 12. The average thermal energy for a mono-atomic gas is : (kB is Boltzmann constant and T absolute temperature) 13. The ratio of contributions made by the electric field and magnetic field components to the intensity of and electromagne 14. A ball is thrown vertically downward with a velocity of 20 m/s from the top of a tower. It hits the ground after some ti 15. A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the sol 16. Taking into account of the significant figures, what is the value of $$9.99 m - 0.0099m$$?
17. Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. What will be the photoele 18. The color code of a resistance is given below : The values of resistance and tolerance, respectively, are 19. Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligi 20. The mean free path for a gas, with molecular diameter d and number density n can be expressed as : 21. A cylinder contains hydrogen gas at pressure 249 kPa and temperature 27$$^\circ $$CIts density is : (R = 8.3 J mol-1 K-1 22. A charged particle having drift velocity 7.5$$ \times $$10-4 ms-1 in an electric field of 3$$ \times $$10-10 Vm-1 has a 23. Dimensions of stress are : 24. A wire of length L, are of cross section A is hanging from a fixed support. The length of the wire changed to L1 when ma 25. In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. Whe 26. Two bodies of mass 4 kg and 6 kg are tied to the ends of a massless string. The string passes over a pulley which is fri 27. The capacitance of a parallel plate capacitor with air as medium is 6$$\mu $$F. With the introduction of a dielectric me 28. In Young's double slit experiment, if the separation between coherent sources is halved and the distance of the screen 29. Light with an average flux of 20 W/cm2 falls on a non-reflecting surface at normal incidence having surface area 20 cm2. 30. Which of the following graph represents the variation of resistivity ($$\rho $$) with temperature (T) for copper? 31. The quantities of heat required to raise the temperature of two solid copper spheres of radii r1 and r2 (r1 = 1.5r2) thr 32. Find the torque about the origin when a force of 3 $$\hat j$$
N acts on a particle whose position vector is 2 $$\hat k$ 33. In a certain region of space with volume 0.2 m3, the electric potential is found to be 5 V throughout. The magnitude of 34. The Brewster's angle ib for an interface should be : 35. The increase in the width of the depletion region in a p-n junction diode is due to : 36. A spherical conductor of radius 10 cm has a charge of 3.2 $$ \times $$ 10-7 C distributed uniformly. That is the magnetu 37. The energy required to break one bond in DNA is 10-20 J. This value in eV is nearly : 38. A 40 $$\mu $$F capacitor is connected to a 200 V. 50 Hz ac supply. The rms value of the current on the circuit is, nearl 39. An electron is accelerated from rest through a potential difference of V volt. If the de-Broglie wavelength of the elect 40. Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard 41. For the logic circuit shown, the truth table is : 42. The solids which have the negative temperature coefficient of resistance are : 43. A series LCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference betw
1
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
An increase in the concentration of the reactants of a reaction leads to change in :
A
heat of reaction
B
threshold energy
C
collision frequency
D
activation energy
2
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
Which of the following alkane cannot be made in good yield by Wurtz reaction?
A
2, 3-Dimethylbutane
B
n-Heptane
C
n-Butane
D
n-Hexane
3
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
Identify the incorrect statement.
A
The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.
B
Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals.
C
The oxidation states of chromium in CrO42- and Cr2O72- are not the same.
D
Cr2+ (d4) is a stronger reducing agent than Fe2+ (d6) in water.
4
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?
A
+R effect of $$ - $$
CH3 groups
B
$$ - $$
R effect of $$ - $$
CH3 groups
C
Hyperconjugation
D
$$ - $$
I effect of $$ - $$
CH3 groups
Paper analysis
Total Questions
Biology
80
Chemistry
37
Physics
43
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