NEET Question Paper 2020 English Set F6

The calculated spin only magnetic moment of ${\text{Cr}}^{2+}$ ion is:

Which of the following is a cationic detergent?

Which of the following amine will give the carbylamine test?

Which of the following set of molecules will have zero dipole moment?

Which of the following is a natural polymer?

Match the following and identify the correct option.

(a) (b) (c) (d)

(1) (iii) (iv) (ii) (i)

(2) (i) (iii) (ii) (iv)

(3) (iii) (i) (ii) (iv)

(4) (iii) (ii) (i) (iv)

An increase in the concentration of the reactants of a reaction leads to change in:

The freezing point depression constant ($K_f$) of benzene is $5.12\text{K}\text{kg}{\text{mol}}^{-1}$. The freezing point depression for the solution of molality $0.078\text{m}$ containing a non-electrolyte solute in benzene is (rounded off upto two decimal places):

Identify a molecule which does not exist.

What is the change in oxidation number of carbon in the following reaction?

The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for the transmission of nerve signals.

Match the following:

Which of the following is correct option?

(a) (b) (c) (d)

(1) (iii) (iv) (i) (ii)

(2) (iv) (iii) (ii) (i)

(3) (i) (ii) (iii) (iv)

(4) (ii) (i) (iv) (iii)

Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as:

Anisole on cleavage with HI gives:

For the reaction, $2\text{Cl}\text{(g)}\to {\text{Cl}}_2\text{(g)}$, the correct option is:

Identify the correct statements from the following:

(a) ${\text{CO}}_2\text{(g)}$ is used as refrigerant for ice-cream and frozen food.

(b) The structure of ${\text{C}}_{60}$ contain twelve six membered rings and twenty five carbon rings.

(c) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline.

(d) CO is colourless and odourless gas.

Which of the following alkane cannot be made in good yield by Wurtz reaction?

HCl was passed through a solution of ${\text{CaCl}}_2$, ${\text{MgCl}}_2$ and $\text{NaCl}$. Which of the following compound(s) crystallise(s)?

Which one of the following has maximum number of atoms?

A mixture of ${\text{N}}_2$ and Argon in a cylinder contains $7\text{g}$ of ${\text{N}}_2$ and $8\text{g}$ of Ar. If the total pressure of the mixture of the gases in the cylinder is $27\text{bar}$, the partial pressure of ${\text{N}}_2$ is:

[Use atomic masses (in g mol${}^{-1}$): N = 14, Ar = 40]

Identify the incorrect statement.

The correct option for free expansion of an ideal gas under adiabatic condition is:

The mixture which shows positive deviation from Raoult's law is:

Which of the following oxoacid of sulphur has $-\text{O}-\text{O}-$ linkage?

Sucrose on hydrolysis gives:

The number of protons, neutrons and electrons in ${}_{71}^{175}\text{Lu}$, respectively, are:

On electrolysis of dil.sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be:

A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?

Urea reacts with water to form A which will decompose to form B. B when passed through ${\text{Cu}}^{2+}$ (aq), deep blue colour solution C is formed. What is the formula of C from the following?

Identify the incorrect match.

The rate constant for a first order reaction is $4.606\times 10^{-3}{\text{s}}^{-1}$. The time required to reduce $2.0\text{g}$ of the reactant to $0.2\text{g}$ is:

An element has a body centered cubic (bcc) structure with a cell edge of $288\text{pm}$. The atomic radius is:

Identify compound X in the following sequence of reactions:

[Diagram showing benzene ring with CH3 group converting to compound X (with CHCl2), then to aldehyde]

Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?

Paper chromatography is an example of:

Identify the correct statement from the following:

Hydrolysis of sucrose is given by the following reaction.

If the equilibrium constant ($K_c$) is $2\times 10^{13}$ at $300\text{K}$, the value of ${\Delta }_{r}G°$ at the same temperature will be:

The number of Faradays(F) required to produce $20\text{g}$ of calcium from molten ${\text{CaCl}}_2$ (Atomic mass of Ca = $40\text{g}{\text{mol}}^{-1}$) is:

Which of the following is a basic amino acid?

An alkene on ozonolysis gives methanal as one of the product. Its structure is:

Measuring Zeta potential is useful in determining which property of colloidal solution?

Find out the solubility of ${\text{Ni(OH)}}_2$ in $0.1\text{M NaOH}$. Given that the ionic product of ${\text{Ni(OH)}}_2$ is $2\times 10^{-15}$.

Which of the following is not correct about carbon monoxide?

Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:

Elimination reaction of 2-Bromo-pentane to form pent-2-ene is:

(a) $\beta$-Elimination reaction

(b) Follows Zaitsev rule

(c) Dehydrohalogenation reaction

(d) Dehydration reaction

Match the following columns and select the correct option.

(a) (b) (c) (d)

(1) (i) (ii) (iv) (iii)

(2) (iv) (iii) (ii) (i)

(3) (iii) (iv) (ii) (i)

(4) (ii) (i) (iv) (iii)

Match the organism with its use in biotechnology.

Select the correct option from the following:

(a) (b) (c) (d)

(1) (iii) (ii) (iv) (i)

(2) (iii) (iv) (i) (ii)

(3) (ii) (iv) (iii) (i)

(4) (iv) (iii) (i) (ii)

Which of the following would help in prevention of diuresis?

The enzyme enterokinase helps in conversion of:

Match the following columns and select the correct option.

(a) (b) (c) (d)

(1) (iii) (i) (iv) (ii)

(2) (ii) (i) (iv) (iii)

(3) (iv) (iii) (i) (ii)

(4) (iii) (ii) (i) (iv)

The roots that originate from the base of the stem are:

Match the following columns and select the correct option.

(a) (b) (c) (d)

(1) (iii) (ii) (iv) (i)

(2) (iv) (iii) (i) (ii)

(3) (ii) (iv) (i) (iii)

(4) (i) (iii) (ii) (iv)

The body of the ovule is fused within the funicle at:

The infectious stage of Plasmodium that enters the human body is:

Identify the wrong statement with regard to Restriction Enzymes.

Which of the following statements about inclusion bodies is incorrect?

Dissolution of the synaptonemal complex occurs during:

Identify the wrong statement with reference to the gene 'I' that controls ABO blood groups.

Select the option including all sexually transmitted diseases.

Which of the following is put into Anaerobic sludge digester for further sewage treatment?

In water hyacinth and water lily, pollination takes place by:

Identify the incorrect statement.

Ray florets have:

Identify the correct statement with regard to $G_1$ phase (Gap 1) of interphase.

The specific palindromic sequence which is recognized by EcoRI is:

Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their:

Which one of the following is the most abundant protein in the animals?

The process of growth is maximum during:

According to Robert May, the global species diversity is about:

Goblet cells of alimentary canal are modified from:

Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.

Which of the following pairs is of unicellular algae?

Match the following columns and select the correct option.

Column - I: (a) 6 - 15 pairs of gill slits, (b) Heterocercal caudal fin, (c) Air Bladder, (d) Poison sting

Column - II: (i) Trygon, (ii) Cyclostomes, (iii) Chondrichthyes, (iv) Osteichthyes

Bilaterally symmetrical and acoelomata animals are exemplified by:

The ovary is half inferior in:

Which of the following regions of the globe exhibits highest species diversity?

By which method was a new breed 'Hisardale' of sheep formed by using Bikaner ewes and Marino rams?

How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?

In light reaction, plastoquinone facilitates the transfer of electrons from:

Name the enzyme that facilitates opening of DNA helix during transcription.

Match the following concerning essential elements and their functions in plants:

Column - I: (a) Iron, (b) Zinc, (c) Boron, (d) Manganese

Column - II: (i) Photolysis of water, (ii) Pollen germination, (iii) Required for chlorophyll biosynthesis, (iv) IAA biosynthesis

Select the correct option:

Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action?

The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of:

Snow-blindness in Antarctic region is due to:

Floridean starch has structure similar to:

Match the following columns and select the correct option.

Column - I: (a) Bt cotton, (b) Adenosine deaminase deficiency, (c) RNAi, (d) PCR

Column - II: (i) Gene therapy, (ii) Cellular defence, (iii) Detection of HIV infection, (iv) Bacillus thuringiensis

Select the correct option:

Meiotic division of the secondary oocyte is completed:

From his experiments, S.L Miller produced amino acids by mixing the following in a closed flask:

Choose the correct pair from the following:

Match the following columns and select the correct option.

Column - I: (a) Placenta, (b) Zona pellucida, (c) Bulbo-urethral glands, (d) Leydig cells

Column - II: (i) Androgens, (ii) Human Chorionic Gonadotropin (hCG), (iii) Layer of the ovum, (iv) Lubrication of the Penis

Select the correct option:

Which of the following statements are true for the phylum-Chordata?

Identify the wrong statement with reference to transport of oxygen.

Experimental verification of the chromosomal theory of inheritance was done by:

The sequence that controls the copy number of the linked DNA in the vector, is termed:

Select the correct statement.

Identify the wrong statement with reference to immunity.

Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?

Match the trophic levels with their correct species examples in grassland ecosystem.

Column - I: (a) Fourth trophic level, (b) Second trophic level, (c) First trophic level, (d) Third trophic level

Column - II: (i) Crow, (ii) Vulture, (iii) Rabbit, (iv) Grass

Select the correct option:

Identify the basic amino acid from the following.

Embryological support for evolution was disapproved by:

The transverse section of a plant shows following anatomical features: Identify the category of plant and its part:

Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage ($G_0$). This process occurs at the end of:

The QRS complex in a standard ECG represents:

The number of substrate level phosphorylations in one turn of citric acid cycle is:

Strobili or cones are found in:

Presence of which of the following conditions in urine are indicative of Diabetes Mellitus?

Flippers of Penguins and Dolphins are examples of:

Which of the following statements is not correct?

Cuboidal epithelium with brush border of microvilli is found in:

Match the following columns and select the correct option.

Column - I: (a) Organ of Corti, (b) Cochlea, (c) Eustachian tube, (d) Stapes

Column - II: (i) Connects middle ear and pharynx, (ii) Coiled part of the labyrinth, (iii) Attached to the oval window, (iv) Located on the basilar membrane

Select the correct option:

Match the following columns and select the correct option.

Column - I: (a) Eosinophils, (b) Basophils, (c) Neutrophils, (d) Lymphocytes

Column - II: (i) Immune response, (ii) Phagocytosis, (iii) Release histaminase, destructive enzymes, (iv) Release granules containing histamine

Select the correct option:

In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?

The first phase of translation is:

Match the following:

Column - I: (a) Inhibitor of catalytic activity, (b) Possess peptide bonds, (c) Cell wall material in fungi, (d) Secondary metabolite

Column - II: (i) Ricin, (ii) Malonate, (iii) Chitin, (iv) Collagen

Choose the correct option from the following:

Which of the following is not an inhibitory substance governing seed dormancy?

The plant parts which consist of two generations - one within the other:

Montreal protocol was signed in 1987 for control of:

Which of the following is correct about viroids?

Which of the following statements is correct?

In gel electrophoresis, separated DNA fragments can be visualized with the help of:

Identify the correct statement with reference to human digestive system.

If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is $6.6\times 10^9$ bp, then the length of the DNA is approximately:

Match the following columns and select the correct option.

Column - I: (a) Gregarious, polyphagous pest, (b) Adult with radial symmetry and larva with bilateral symmetry, (c) Book lungs, (d) Bioluminescence

Column - II: (i) Asterias, (ii) Scorpion, (iii) Ctenoplana, (iv) Locusta

Select the correct option:

Select the correct match.

In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?

Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to:

Select the correct events that occur during inspiration.

Which of the following is not an attribute of a population?

The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is:

Match the following with respect to meiosis:

Column - I: (a) Zygotene, (b) Pachytene, (c) Diplotene, (d) Diakinesis

Column - II: (i) Terminalization, (ii) Chiasmata, (iii) Crossing over, (iv) Synapsis

Select the correct option from the following:

If the head of cockroach is removed, it may live for few days because:

Match the following diseases with the causative organism and select the correct option.

Column - I: (a) Typhoid, (b) Pneumonia, (c) Filariasis, (d) Malaria

Column - II: (i) Wuchereria, (ii) Plasmodium, (iii) Salmonella, (iv) Haemophilus

Select the correct option:

The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are:

Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle?

Identify the substances having glycosidic bond and peptide bond, respectively in their structure:

A charged particle having drift velocity of $7.5\times 10^{-4}\text{m}{\text{s}}^{-1}$ in an electric field of $3\times 10^{-10}\text{V}{\text{m}}^{-1}$, has a mobility in ${\text{m}}^2{\text{V}}^{-1}{\text{s}}^{-1}$ of:

The mean free path for a gas, with molecular diameter $d$ and number density $n$ can be expressed as:

The energy equivalent of 0.5 g of a substance is:

Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of telescope whose objective has a diameter of 2 m is:

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 solenoid is:

(${\mu }_0=4\pi \times 10^{-7}\text{T}\text{m}{\text{A}}^{-1}$)

The quantities of heat required to raise the temperature of two solid copper spheres of radii $r_1$ and $r_2$ ($r_1=1.5r_2$) through 1 K are in the ratio:

The capacitance of a parallel plate capacitor with air as medium is 6 μF. With the introduction of a dielectric medium, the capacitance becomes 30 μF. The permittivity of the medium is:

(${\epsilon }_0=8.85\times 10^{-12}{\text{C}}^2{\text{N}}^{-1}{\text{m}}^{-2}$)

A short electric dipole has a dipole moment of $16\times 10^{-9}\text{C}\text{m}$. The electric potential due to the dipole at a point at a distance of 0.6 m from the centre of the dipole, situated on a line making an angle of $60°$ with the dipole axis is:

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 negligible mass.

The centre of mass of the system from the 5 kg particle is nearly at a distance of:

The Brewsters angle $i_b$ for an interface should be:

For which one of the following, Bohr model is not valid?

Find the torque about the origin when a force of $3\hat{j}\text{N}$ acts on a particle whose position vector is $2\hat{k}\text{m}$.

For transistor action, which of the following statements is correct?

Which of the following graph represents the variation of resistivity ($\rho$) with temperature (T) for copper? [Diagram: four graphs showing different curves]

A spherical conductor of radius 10 cm has a charge of $3.2\times 10^{-7}\text{C}$ distributed uniformly. What is the magnitude of electric field at a point 15 cm from the centre of the sphere?

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 is:

A series LCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference between current and voltage is $\frac{\pi }{5}$. If instead C is removed from the circuit, the phase difference is again $\frac{\pi }{5}$ between current and voltage. The power factor of the circuit is:

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 time with a velocity of 80 m/s. The height of the tower is: ($g=10{\text{m/s}}^2$)

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 radius of the earth?

The energy required to break one bond in DNA is $10^{-20}\text{J}$. This value in eV is nearly:

A wire of length L, area of cross section A is hanging from a fixed support. The length of the wire changes to $L_1$ when mass M is suspended from its free end. The expression for Young's modulus is:

An electron is accelerated from rest through a potential difference of V volt. If the de Broglie wavelength of the electron is $1.227\times 10^{-2}\text{nm}$, the potential difference is:

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 frictionless (see figure). The acceleration of the system in terms of acceleration due to gravity ($g$) is:

Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled?

Taking into account of the significant figures, what is the value of $9.99\text{m}-0.0099\text{m}$?

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 normally from the opposite surface. If the refractive index of the material of the prism is $\mu$, then the angle of incidence is nearly equal to:

The increase in the width of the depletion region in a p-n junction diode is due to:

In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. When tension in B is slightly decreased, the beat frequency increases to 7 Hz. If the frequency of A is 530 Hz, the original frequency of B will be:

The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is: ($c$ = speed of electromagnetic waves)

In a certain region of space with volume 0.2 m${}^3$, the electric potential is found to be 5 V throughout. The magnitude of electric field in this region is:

In Young's double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes:

For the logic circuit shown, the truth table is: [Diagram: logic circuit with NOT, AND gates]

A resistance wire connected in the left gap of a metre bridge balances a 10 Ω resistance in the right gap at a point which divides the bridge wire in the ratio 3 : 2. If the length of the resistance wire is 1.5 m, then the length of 1 Ω of the resistance wire is:

When a uranium isotope ${}_{92}^{235}\text{U}$ is bombarded with a neutron, it generates ${}_{36}^{89}\text{Kr}$, three neutrons and:

The color code of a resistance is given below:

[Diagram: resistor color bands - Yellow, Violet, Brown, Gold]

The values of resistance and tolerance, respectively, are:

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 capillary is 5 g. Another capillary tube of radius $2r$ is immersed in water. The mass of water that will rise in this tube is:

A cylinder contains hydrogen gas at pressure of 249 kPa and temperature 27°C. Its density is: ($R=8.3\text{J}{\text{mol}}^{-1}{\text{K}}^{-1}$)

The solids which have the negative temperature coefficient of resistance are:

The average thermal energy for a mono-atomic gas is: ($k_B$ is Boltzmann constant and T, absolute temperature)

Light with an average flux of 20 W/cm${}^2$ falls on a non-reflecting surface at normal incidence having surface area 20 cm${}^2$. The energy received by the surface during time span of 1 minute is:

Dimensions of stress are:

Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stop cock is suddenly opened. The process is:

An iron rod of susceptibility 599 is subjected to a magnetising field of 1200 A m${}^{-1}$. The permeability of the material of the rod is:

(${\mu }_0=4\pi \times 10^{-7}\text{T}\text{m}{\text{A}}^{-1}$)

The phase difference between displacement and acceleration of a particle in a simple harmonic motion is:

A 40 μF capacitor is connected to a 200 V, 50 Hz ac supply. The rms value of the current in the circuit is, nearly: