Grand Test 11 For NEET 2021

1.Equal masses of methane and hydrogen are mixed in an empty container at 25^o The fraction of the total pressure exerted by hydrogen is,

2.The ionization enthalpy of hydrogen atom is 1.312 × 10⁶ J mol^-1. The energy required to excite the electron in an atom from n = 1 to n = 2 is,

3.In a flask colorless N₂O₄ is in equilibrium with brown colored NO₂. At equilibrium when the flask is heated at 100^o, the brown color deepens and on cooling it becomes less colored. The change in enthalpy, ΔH for this system is,

4.Among the following the paramagnetic compound is,

5.A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 kV, its kinetic energy will be,

6.Which of the following is NOT a buffer solution?

7.Lattice energies of BeF₂, MgF₂, CaF₂ and BaF₂ are -2906, -2610, -2459 and -2367 kJ mol^-1 Hydration energies of Be²⁺, Mg²⁺, Ca²⁺, Ba²⁺ and F^– are -2494, -1921, -1577, -1305 and -457 kJ mol^-1, respectively. Which of the following fluorides is soluble in water?

8.Which species has the maximum number of lone pair of electrons in the central atom?

9.Number of moles of K₂Cr₂O₇ reduced by one mole of Sn²⁺ ions is,

10.A jeweler is selling 22-carat gold articles with 95% purity, it is approximately, (24 carat = pure gold)

11.On adding 0.1 M solution each of Ag⁺, Ba²⁺, Ca²⁺ in a Na₂SO₄ solution, which species is first precipitated? [Given K_sp (BaSO₄) = 10^-11, K_sp (CaSO₄) = 10^-6, K_sp(Ag₂SO₄) = 10^-5]

12.Pauling’s electronegativity values for elements are useful in predicting,

13.Metals like Pt and Pd can take up large volume of hydrogen under special conditions. Hydrogen thus retained by the metal is called,

14.Which of the following statement is not true?

15.For alkali metals, which one of the following tends is incorrect?

16.For a reaction scheme, A→B→C (k₁ and k₂ are rate constant for the reaction A→B and B→C respectively), if the rate of formation of B is set to be zero then the concentration of B is given by

17.Consider the following aqueous solutions of electrolytes and assume 100% ionization,

I. 1 m Urea

II. 04 m Al₂(SO₄)₃

III. 05 m CaCl₂

IV. 005 m NaCl

Which of the following is correct statement regarding the above solutions?

18.Which of the following is not an antacid?

19.The electrode potential of a silver electrode dipped in a saturated solution of AgCl in contact with 0.1 M KCl solution at 25^oC is, (K_sp of AgCl = 1 × 10^-10)

20.Hydrogen ion concentration in mol/L in a solution of pH = 5.4 will be,

21.Iron (II) oxide, FeO, crystal has a cubic structure and each edge of the unit cell is 5.0 Å. If the density of the oxide is 4.0 g cm-3, then what will be the number of Fe³⁺ ions present in each unit cell?

22.An octahedral complex with molecular composition M.5NH₃.Cl.SO₄, has two isomers, A and B. The solution of A gives a white precipitate with AgNO₃ solution and the solution of B give white precipitate with BaCl₂ The type of isomerism exhibited by the complex is,

23.Plot of log(x/m) against logP is a straight line inclined at an angle of 45^o. When the pressure is 0.5 atm and Freundlich parameter, k is 10, the amount of solute adsorbed per gram of adsorbent will be (log 5 = 0.6990)

24.Glucose molecule reacts with X number of molecules of phenyl hydrazine to yield osazone. The value of X is,

25.Amoung the following, the pair in which the two species are not isostructural is,

27.In the following compounds,

the order of basicity is,

27.In galvanic cell, the salt bridge

28.HI cannot be prepared by which of the following methods?

29.The magnetic moment of an octahedral homoleptic Mn(II) complex is 5.9 BM. The suitable ligand for this complex is,

30.Pure ethanol has boiling point T_b. Addition of acetone on ethanol makes a solution, which has boiling point T_mix. Which of the following observation is true at a constant pressure,

31.The color of KMnO₄ is due to,

32.What is the product of the following reaction?

33.Among the following statements, the incorrect one is,

34.Which of the following chemical systems is/are, non-aromatic?

35.Which of the following reagents cannot be used to distinguish between propene and propyne?

36.The product obtained via oxymercuration (HgSO₄ + H₂SO₄) of 1-butyne would be,

37.Nitrobenzene gives N-phenylhydroxylamine by,

38.Which of the following is the product for the given reaction?

39.The products P₁ and P₂ for the following reaction are respectively,

40.During carbylamine reaction, which of the following species is produced?

41.Predict the main product of the following reaction

42.A chiral ether C₅H₁₀O reacts with hot HI to give a C₅H₁₀I₂ Treatment of this with hot KOH in ethanol produces 1, 3-pentadiene. What is the structure of the original ether?

43.Aldehyde group can be protected,

44.The compound C₇H₈ undergoes the following reactions:

    The product C is,

45.The turbidity of a polymer solution measures,

46.In Bryophyllum the adventitious buds arise from

47.Which of the following contain information on any one taxon?

48.Which of the following statement is not correct?

49.Under suitable conditions, slime moulds form an aggregation which is called

50.Anisogamous fusion is found in

51.Asexual reproduction in most brown algae is carried out by

52.Floridean starch is stored by

53.Katherine Esau is renowned for her contribution in

54.During the formation of leaves and elongation of stems, some cells ‘left behind’ from shoot apical meristem ,this constitute

55.How many statements of the following are false?

I. Blast fibres generally absent in the primary phloem but are found in the secondary phloem

II. The trichomes in the shoot system are usually multicellular

III. Because of the presence of cambium in dicotyledonous stems, vascular bundles are capable of producing primary Xylem and Phloem

IV. The cortex of the root consists of several layers of thin-walled Collenchyma cells with intercellular spaces

56.Whorled phyllotaxy is defined by

57.Match the column

58.Ramachandran discovered

59.Which structure extends from the cell surface to the outside of bacterial flagellum?

60.Assertion: Carrier proteins are found across the plasma membrane

 Reason: Plasma membrane is a nonpolar lipid bilayer

61.Which of the following statements are not correct?

I. Endoplasmic reticulum is the important site of formation of glycoproteins and glycolipids

II. RER is Extensive and continuous with the outer membrane of the nucleus

III. The middle lamella is a layer mainly of calcium pectate.

IV. The mitochondria divide by fusion

62.Meiosis I is initiated after

63.Assertion: The amount of genomic DNA in complex eukaryotes is much greater than      the amount needed to encode proteins.

  Reason: C value paradox

64.The theory that plants change light energy to chemical energy by transferring an electron in an organised array of pigment molecules and other substances, was proposed by

65.Ions are absorbed from the soil by

66.Root pressure does not account for the majority of water transport; most plants meet their need by……………….

67.Dicotyledonous leaf has greater number of stomata arranged mainly in

68.Phloem loading produces

69.Which one of the following is directly involved in DNA and RNA synthesis in plants

70.In synthesis of auxin …………..is essential

71.Find out the odd statement

I. Each photosystem has all the pigments forming a light harvesting system also called antennae

II.  The two photosystems are not connected through an electron transport chain, rather runs individually

III. Cyclic photophosphorylation also occurs when only light of wavelengths beyond 680 nm are available for excitation

IV. In the photo respiratory pathway, there is neither synthesis of sugars, nor of ATP

72.

This type of growth can be found in

73.In plant growth ethylene acts as

74.A typical angiosperm embryo sac are

75.Which one of the following loses pollen grain viability within 30 minutes?

76.Mendel started his experiments with pure strains of peas a pure strain was developed by removing all

77.In Mendel’s crosses beginning with two pure strains of pea plants, one with yellow peas (Y/Y) and the other with green peas (y/y) , the test cross was done between F2 offspring with yellow peas and a pure strain of plants with the genotype

78.Mendel studied a total of ………..traits in peas, each trait occurring in………..different forms

79.Assertion: 2′-OH group present at every nucleotide in RNA is a reactive group and makes RNA labile and easily degradable.

Reason: RNA is catalytic

80.The specificity of RNA polymerase whether to initiate or terminate transcription depends upon

81.……………….exposes harmful recessive genes that are eliminated by selection.

82.Ladybird and Dragonflies are very useful to control

83.

The above picture is of

84.Ectoparasites are

85.All alleles originate from

86.Competitive exclusion principle was stated by

87.The entire sequence of communities that successively change in a given area are called

88.How many statements are correct?

I. The broadly utilitarian arguments for conserving biodiversity are obvious

II. Bio prospecting refers to exploring molecular, genetic and species-level diversity for products of economic importance

III. Endemism is stated as the species confined to that region and not found anywhere else

IV. Tropics harbour less species than temperate areas

89.Most of the food chains are composed of

90.Government of India passed Water Act in

91.Vertebrates differ from other chordates in having the…………replaced, in adults, by a ………………

92.Species are considered as

93.Which  one  of  the  following  pairs  of  items  correctly  belongs  to  the  category  of  organs  mentioned against it? 

94.Metameric segmentation is the characteristic of 

95.Muscle fibres are enclosed by

96.Columnar epithelium is composed of

97.How many statements are true?

I. Nucleic acids like DNA and RNA consist of nucleosides only

II. Antibiotics are secondary metabolite

III. Glucose transport is facilitated by GLUT-2

IV. Rate of a physical or chemical process refers to the amount of substrate formed per unit time

98..Niacin is a ……………..in NADP

99.

Here the enzyme falls in a group of

100.Which of the following statement is incorrect?

101.Glisson’s capsule is involved in

102.The optimal pH for pepsin is

103.

The sigmoid curve is obtained when

104.Which part of the body is highly sensitive to changes in CO2 and hydrogen ion

105.Cardiac output is determined by the……and the……..

106.Heart attack occurs when

107.Which of the following sections of the mammalian nephrons incorrectly paired with its functions

108.The process of reabsorption in the formation of urine ensures that

109.The renal medulla consists of cone shaped tissue masses called

110Which of the following acts as a shock absorber to cushion the tibia and the femur where they come together?

111.Anaerobic work becomes painful because of an accumulation of

112.The neurotransmitters are dependent on………..to initiate an action potential in synaptic cleft

113.

The above pathway is a……………….pathway and the Q is………………

114.Epinephrine is a

115.The thin membranous part of Uterus is

116.Saheli- the oral contraceptive pills is made up of

117.Which of the following statements is not true if we consider postulates of Darwinian Theory of evolution?

118.If the frequency of one allele is p, then the frequency of the alternative allele in the population is

119.Cycads arrives in the era

120.Pre-historic human’s cave art can be seen in

121.The ‘good humor’ hypothesis of health was disproved by William Harvey by

122.The most serious form of malaria is caused by

123.Internal bleeding, muscular pain, fever, anaemia and blockage of the intestinal passage are common symptoms of the parasite disease

124.Which of the following statement is incorrect?

125.Which one of the following has potent stimulating action on CNS?

126.Which of the following restriction enzymes produces blunt ends? 

127.Which  of  the  following  is  not  correctly  matched  for  the  organism  and    its  cell  wall  degrading  enzyme?

128.The construction of the first recombinant DNA was in

129.Which one of these are act as selectable marker in E.coli

130.Biolistics involve in

131.Which one of the following vectors is used to replace the defective gene in gene therapy? 

132.ELISA is used to detect viruses where the key  reagent  is

133.Golden  rice is  a transgenic  crop  of the  future  with the  following improved trait 

134.Transgenically produced human protein-enriched milk was first produced in

135.Which  one  of  the  following  is  now  being  commercially  produced  by  biotechnological  procedures? 

136.The total momentum of electrons in a straight wire of copper of length 1 metre carrying a current of 16 A is:

137. Select the correct statement regarding streamline flow:

138. The reading of ammeter in ampere for the following circuit is:

139.Three particles of masses 1kg, 3/2 kg and 2kg are located at three vertices of an equilateral triangle of side a. the x, y co-ordinate of the centre of mass are.

140.There are two wires of the same length and of the same material and radii r & 2r. the ratio of their specific resistance is:

141.Two dielectric slab of dielectric constant K₁ and K₂  and of same thickness is inserted in parallel plates capacitor and K₁=2K_2.  The potential difference across slabs are V₁and V₂ respectively then:

142.If L₁& L₂ are lengths of the first and second resonating air columns in a resonance tube, then the wavelength of the note produced is:

143.Two similar Plano convex lenses are combined together in three different ways as shown in the adjoining figure. The ratio of the focal lengths in three cases will be:

144.If alpha beta and gamma rays carry same momentum, which has the longest wavelength:

145.Find charge stored (in micro C) on the capacitor in steady state condition:

146.The current through an ideal PN junction shown in the following circuit diagram will be:

147. assume that a neutron breaks into a proton and an drone energy released during this process is ( mass of neutron= 1.6745×10^-27 Kg, mass of proton=1.6725×10^-27 Kg, mass of electron=9×10^-31 Kg):

148.The wavefront of a distant source of unknown shape is approximately:

149.A thermodynamics system is taken through the closed cycle PQRSP process. the work done by the system is:

150.In Y.D.S.E, the slits are illuminated by yellow light of wavelength 600 nm. what would be the fringe width on a screen placed 1m away from the plane of the slit if the whole system is immersed in water of refractive index 4/3:

151.A rectangular coil ABCD is rotated in uniform magnetic field with constant angular velocity about its one of the diameter as shown in figure. The induced EMF will be maximum when the plane of the coil is:

152.in the propagation of plane polarized light waves the angle between the direction of vibration and plane of polarization is:

153. The following figure shows a logic gate circuit with two inputs A and B and the output Y. The voltage waveform of A and B and output Y are as given:

The logic gate is :

154.The temperature of furnace is 200°C in its spectrum the maximum intensity is obtained at about 40nm, if the maximum intensity is at 20 nm. calculate the temperature of the furnace in °C is:

155.Laser light (630 nm) incident on a pair of slits produces an interference pattern in which the bright fringes are separated by 8.3 mm. A second light produce interference pattern in which the bright fringes are separated by 7.6 mm. what is the wavelength of the second light in nm?

156.Internal forces acting on a system of particle can change

157. A particle moves with constant velocity in x-y plane. It’s possible angular momentum with respect to origin is:

158.A capillary tube of radius 0.2 mm is dipped vertically in water. Find the height of water column raised in the tube. surface tension of water =0.075 N/m and density of water =10³ kg/ m³:

159. In the circuit shown in figure C_1, C₂   and battery B= 20V. The switch S₁ is first closed, it is then opened and S₂ is closed. what is the final charge on C₂(in micro coulomb)?

160.The following set of values for C_P and C_V of a gas has been reported by different students. The units are cal/mol-K. which one of the following set is most reliable

161.The component of vector A=2i+3j  along the vector i+j is:

162.In the arrangement shown, given that a biconvex lens of radius of curvature equal to 10 cm and concave mirror has focal length equal to 20 cm find the distance x such that the final image formed by the system coincides with the object:

163.In a photoelectric cell, photoelectric current ‘i’ is measured by changing the intensity ‘I’ of incident light radiation. Which of the following graph shown here represents the measured results?

164.Two radioactive substances A and B have their half life period 1 and 2 yr respectively. samples A and B initially contain equal number of atoms. After 4 years the ratio of the number of undecayed atoms of A to the number of undecayed atom of B is:

165.The wave function in SI units for an electromagnetic wave is given as y=10³ sin π(3×10⁶x-9×10¹⁴t). The speed of the wave is:

166.A particle executing simple harmonic motion with an amplitude of 4 cm. At the mean position the velocity of the particle is 10 cm/s. the distance of the particle from mean position where its speed becomes 5 cm/s is:

167.Five equal resistances each of resistance R are connected as shown in the figure. A battery of voltage V is connected between A and B. The current flowing in CE segment will be:

168.An experiment takes 10 min for an electric kettle to heat a certain quantity of water from 0 to 100°C. If it take 54 min to convert this water at 100°C into steam, the latent heat of steam is:

169.The P-V diagram of a certain process (cannot cycle) is as shown in the figure. The process is represented as:

170.There are three arrangement of three point masses (each of mass m). In which of the following three arrangements they are arranged in order of increasing magnitude of gravitational force on point mass marked as 1?

171.An insulated box containing a diatomic gas of molar mass M is moving with a velocity v. The box is suddenly stopped. The resulting change in temperature is:

172.Two magnets are held together in a vibrating magnetometer and are allowed to oscillate in the Earth’s magnetic field. With like poles of magnets together, 12 oscillations per minute are made but for unlike poles together only 4 oscillations per minute are executed. The ratio of their magnetic moments is:

173.Vibration of a string of length 60cm fixed at both the ends are represented by the equation y=2 sin(4πx/15)cos(96πt) where x and y are in cm the maximum number of loops that can be formed in it is:

174.What is the magnitude of acceleration of a block moving with speed 10 m/s on a rough surface if coefficient of friction 0.2.

175.In the given figure, if speed given to block A is 10m/s then speed of centre of mass after 10s will be:

176.A spring of force constant k is cut into three equal pieces. If these three pieces are connected in parallel then the force constant of the combination will be

177.A satellite of Earth of mass M taken from orbital radius 2R to 3R, the minimum work done

178.An inductor coil stores U energy when I current is passed through it and dissipates energy at the rate of p. the time constant of the circuit when the coil is connected across a battery of zero internal resistance is:

179.Initially key was placed on (1) till the capacitor got fully charged. Now key is placed on (2) at t = 0, the minimum time when the energy in both capacitor and inductor will be same:

180.At what angle from horizontal should an object be thrown for it to have maximum range?