Grand Test 2 for NEET 2021

Which statement regarding anal cerci and anal style in cockroach is correct?

Select the  correct  statement  regarding Periplaneta americana

In human fibrous cartilage is found abundantly

Which of the following statement is incorrect regarding cuboidal epithelium ?

Which of  the  following  statement(s)  regarding  cell junctions is/are correct ?

Which of  the  following  types  of  connective  tissue  is Mismatched with its matrix ?

How many of the following junctions are found in epithelium tissue :-

Tight junction, Gap junction, Adhering and Interdigitation.

Select the correct option about given diagram

1. Mesothelium is : –

Match the terms (given in column I) with their explanation

(given in column II) and choose the correct combination

from the options given below

‘X’ ensures the production of ‘Y’ phase in the life cycle of

sexually  reproducing  organisms  whereas  fertilization

restores the ‘Z’ phase.

Iden tify X,  Y an d Z.

The following events occur during the process of meiosis.

Arrange the following events of meiosis in the correct

sequence.

I. Terminalization

II. Crossing over

III. Synapsis

IV. Disjunction of genomes

Number of  bivalents  are  8  in  prophase    What  is  the

number of chromosomes during anaphase II ?

A triploid nucleus cannot undergo meiosis because

Which one of the following precedes re-formation of the

nuclear envelope during M phase of the cell cycle ?

It is important that the centromere not divide till the end

of metaphase because it

In animal cells, cytokinesis involves

The major  event  that  occurs  during  the  anaphase  of

mitosis,  which  brings  about  the  equal  distribution  of

chromosomes is

Which of  the  following  cellular  structures  always

disappears during mitosis and meiosis?

During  mitosis,  nuclear  envelope,  nucleolous  begin  to

form and ER to reappear at ______

which of the following elements is present maximally in earth crust and Human body?

All of the following amino acid can absorb wavelengths of light except

which of the following is wrong with respect to amnio acid?

Find which is mismatched?

Find odd about protein packaging —

Which of the following is a direct part of DNA?

If ‘X’ is DNA consists of 20% Adenine. And ‘Y’ is another DNA consists of 30% Adenine.

Assertion: DNA A has higher melting point than DNA B

Reason: Chargaff Base equivalence says one purine binds with a pyrimidine with hydrogen bond

Choose correct one –

what is correct relation between two successive bases of B-DNA?

which one is false-

which of the following is odd with respect to biomolecular aspect-

which of the following is not strictly macro molecule?

find the wrong match-

wrong about carbohydrates

Identify number enzymes with haem as prosthetic group among following names-

Cytochrome, Hemoglobin, Myoglobin, catalase, Peroxidase

which circulation have maximum blood per minute?

hypertension leads to damage of all except-

Leading cause of CAD is due to all except-

angiography and angioplasty are related with

T -wave in ECG significant for-

sympathetic system increases all except

pace setter is-

which of the following can’t be known from ECG-

cardiac index is maximum in-

Heart failure is mostly due to congestion of blood in-

Myogenic heart can be influenced by

False regarding Rh incompatibility-

which of the following is not used in MI patient

Hemophillia is a disorder related with

purpura (severe thrombocytopenia)will lead to increase in-

which clotting factor is inorganic ?

Which of the following is not related with clotting system?

Universal recipient should be-

False regarding serum-

which protein controls amount of lymph?

All are present in mature erythrocytes except-

which is wrong regarding neutrophils?

which is mismatched?

False regarding Hb-

Adult hemoglobin contains all except-

Incorrect about Lymph-

which of the following cell of testis can produce estrogen-

hCG corresponds to all except-

Which of the following is mismatched-

Which of the following organ is present in between bladder and rectum in case of men

Spermiation occurs in-

False regarding fallopian tube-

ZP performs all except-

Surest prove of virginity-

Which is extratesticular?

Urethra passes through all except

Oxytocin receptor present in –

Sertoli cell does all except

All are true except

GnRH stimulates to release

signal of parturition developed from

Fetal heart at which week-

which of the hormone level in found increased in pregnancy?

which of the following is not related with blastula?

which of the following hormone gives signal for corpus luteum of pregnancy?

Which of the following is a nonsteroidal pill ?

How enzymes increases the rate of reactions?

• For the reaction 2N₂O₅ à4NO₂+O₂ rate and rate constant are 1.02 * 10^-4 Ms^-1 and 3.4 * 10^-5S^-1 respectively,then concentration of N₂O₅ at that time will be (in molarity)

A. 732

B. 3

C. 02*10^-4

D. 4*10⁵

A human body required 0.01 m activity of radioactive substance after 24 hours . Half life of radioactive substance is 6 hours. Then injection of maximum activity of radioactive substance that can be injected

When a biochemical reaction is carried out in laboratory, Outside the human body in absence of enzyme , then rate of reaction obtained is 10-6 times , the activation energy of reaction in the presence of enzyme is

3A –>  2B, rate of reaction +d(B)/dt is equal to

2A –> B+C

It would be  a zero order reaction when

A 5 ampere current is passed through a solution of zinc sulphate for 40 minutes. The amount of zinc deposited at the cathode is

The molar conductances of NaCl , HCl and CH₃COONa at infinite dilution are 126.45, 426.16 and 91 ohm^-1 cm²mol^-1 The molar conductance of CH³COOH at  infinite dilution is

1) E° for the cell Zn|Zn²⁺(aq)||Cu²⁺(aq)| Cu is 1.10 V at 25°C, the equilibrium  constant for the reaction Zn+ Cu²⁺ (aq) ⇌ Cu + Zn²⁺ (aq) is the order of

a) 10⁺¹⁸

^b)   10⁺³⁷

c) 10^-28

d) 10^-37

For the cell reaction, Cu²⁺ (C₁ . aq) + Zn(s) = Zn²⁺ (C2 . aq) + Cu(s) of an electrochemical cell , the change in free energy ∆G at a given temperature is a function of

A. ln (C₂)

B. ln(C₂/C₁)

C. ln(C₁)

D. ln(C₁+C₂)

The specific conductance of a 0.1 N KCl solution at 23°C iss 0.012 ohm^-1cm^-1. The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be

For the disproportionation of copper 2Cu⁺ à Cu²⁺ Cu, E° is (Given E° for Cu²⁺/Cu is 0.34 V and E° for Cu²⁺/Cu⁺ is 0.15 v)

Cell reaction is spontaneous when

Equivalent conductances of Ba²⁺ and Cl^– ions are 127 and 76 ohm^-1 cm^-1 eq^-1 Equivalent conductance of BaCl₂ at infinite dilution is (in the unit ohm^-1 cm^-1 eq^-1)

Standard electrode potentials are

Fe²⁺/Fe ;  E° = -0.44 volts

Fe³⁺ / Fe²⁺ ; E°= 0.77 volts

Fe²⁺ , Fe ³⁺ and Fe blocks are kept together,then

a) Fe³⁺ increases

b) Fe³⁺ decreases

c) Fe²⁺/ Fe³⁺ remains unchanged

d) Fe²⁺  decreases

PbO₂ à PbO ∆G₂₉₈ < 0

SnO₂ à SnO    ∆G₂₉₈ > 0

Most probable oxidation state of Pb and Sn will be

A. Pb⁴⁺ , Sn⁴⁺

B. Pb⁴⁺ , Sn²⁺

C. Pb²⁺,Sn²⁺

D. Pb²⁺ , Sn⁴⁺

The most convenient method to protect the bottom of a ship made of iron is

Which one of the following statements is not correct?

Which of the following transition element shows the highest  oxidation state ?

Amongst TiF^2-₆ , CoF^3-₆ , Cu₂Cl₂, and Nicl₄^2-, which are the colourless species ? (atomic number of Ti = 22, Co = 27 , Cu = 29, Ni = 28)

A. CoF₆^3- and NiCl₄^2-

B. TiF₆^2- and Cu₂Cl₂

C. Cu₂Cl₂ and NiCl₄^2-

D. TiF₆^2- and CoF₆^3-

When calomel reacts with NH4OH , We get

A. Hg₂O

B. HgO

C. HgNH₂Cl

D. NH₂ – Hg – Hg Cl

The lanthanide contraction is responsible for the fact that

K₂Cr₂O₇ on heating with aqueous NaOH gives

A. Cr₂O₇^2-

B. Cr(OH)₂

C. CrO^2-₄

D. Cr(OH)₃

Which one of the following ionic species will impart colour to an aqueous solution ?

A. Zn²⁺

B. Cu⁺

C. Ti⁴⁺

D. Cr³⁺

Which one of the following elements shows maximum number of different oxidation states in its compounds?

• The basic character of hydrides of the Vth group elements decreases in the order

A. NH₃ > PH₃ >AsH₃ > SbH₃

B. SbH₃ > AsH₃ > PH₃ >NH₃

C. SbH₃ > PH₃ > AsH₃ > NH₃

D. NH₃ > SbH₃ > PH₃ > AsH₃

Reaction of sodium thiosulphate with iodine gives

Among the following oxides , the least acidic is

A. As₄O₆

B. As₄O₁₀

C. P₄O₆

D. P₄O₁₀

Which of the following represents calcium chlorite?

A. Ca(ClO₃)₂

B. Ca(ClO₂)₂

C. CaClO₂

D. Ca(ClO₄)₂

A One litre flask is full of brown bromine vapour. The intensity of brown colour of vapour will not decrease appreciably on adding to the flask some

Repeated use of which one of the following fertilizers would increase the acidity of the soil ?

Which of the following oxides is most acidic ?

A. As₂O₅

B. P₂O₅

C. N₂O₅

D. Sb₂O₅

Which of the following phosphorus is the most reactive?

How many σ and ∏ bonds are present in the following molecule:

The IUPAC name of the following compound is

What is the shape of HCHO?

Write formulas for the first three members of the homologous series beginning with

In the organic compound

The pair of  hybridized orbitals involved in the formation of C2 ̶C3 bond is

The number of resonance contributing structures for the following compound is

Which of the following carbonyl compounds will form carbanion most readily?

Which of the following can be applied to explain relative order of stability of carbocations?

If the carbocation   rearranges to gain stability , it will rearrange to

   Which of these shows incorrect representation of inductive effect?

Hyperconjugation is most useful for  stabilizing which of the following carbocations?

Heterolytic fission of  a covalent bond  in organic molecules gives

The magnetic susceptibility is negative for

Hysteresis loops for two magnetic materials A and B are given below:

These materials are used to make magnets for electric generators, transformer core and electromagnet core. Then it is proper to use:

An iron rod is placed parallel to magnetic field of intensity 2000 A/m. The magnetic flux through the rod is 6 × 10^–4 Wb and its cross-sectional area is 3 cm². The magnetic permeability of the rod in Wb/A–m is

The magnetic lines of force inside a bar magnet

If an electron and a proton having same momenta enter perpendicularly to a magnetic field, then

Two identical balls A and B having velocities of 0.5 m/s and –0.3 m/s respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be

A block of mass 10 kg moving in x direction with a constant speed of 10 ms^–1, is subjected to a retarding force F = 0.1x J/m during its travel from x = 20 m to 30 m. Its final KE will be

A force F acting on an object varies with distance x as shown here. The force is in N and x in m. The work done by the force in moving the object from x = 0 to x = 6 m is

A filament bulb (500 W, 100 V) is to be used in a 230 V main supply. When a resistance R is connected in series, it works perfectly and the bulb consumes 500 W. The value of R is

The temperature dependence of resistances of Cu and undoped Si in the temperature range 300-400 K, is best described by

A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 ohm all connected in series. If the ammeter has a coil of resistance 480 ohm and a shunt of 20 ohm, the reading in the ammeter will be

A, B and C are voltmeters of resistance R, 1.5R and 3R respectively as shown in the figure. When some potential difference is applied between X and Y, the voltmeter readings are V_A, V_B and V_C respectively, then

The supply voltage to a room is 120 V. The resistance of the lead wires is 6 Ω. A 60 W bulb is already switched on. What is the decrease of voltage across the bulb, when a 240 W heater is switched on in parallel to the bulb? 

A capacitor of 2 μF is charged as shown in the diagram. When the switch S is turned to position 2, the percentage of its stored energy dissipated is 

A parallel plate air capacitor of capacitance C is connected to a cell of emf V and then disconnected from it. A dielectric slab of dielectric constant K, which can just fill the air gap of the capacitor, is now inserted in it. Which of the following is incorrect?

Two charges, each equal to q, are kept at x = – a and x = a on the x-axis. A particle of mass m and charge q₀ = q/2 is placed at the origin. If charge q₀ is given a small displacement (y << a) along the y-axis, the net force acting on the particle is proportional to

Two spherical conductors A and B of radii 1 mm and 2 mm are separated by a distance of 5 cm and are uniformly charged. If the spheres are connected by a conducting wire then in equilibrium condition, the ratio of the magnitude of the electric fields at the surface of spheres A and B is

Consider a neutral conducting sphere. A positive point charge is placed outside the sphere. The net charge on the sphere is then,

. In potentiometer experiment, null point is obtained at a particular point for a cell on potentiometer wire x cm long. If the length of the potentiometer wire is increased without changing the cell, the balancing length will (Driving source is not changed)

In the circuit shown, the current in the 1Ω resistor is 

A potentiometer wire of length 10 m is connected in series with a battery. The e.m.f. of a cell  balances against 250 cm length of wire. If length of potentiometer wire is increased by 1 m, the new balancing length of wire will be

Two electric bulbs marked 25 W – 220 V and 100 W – 220 V are connected in series to a 440 V supply. Which of the bulbs will fuse?

A resistor ‘R’ and 2μF capacitor in series is connected through a switch to 200 V direct supply. Across the capacitor is a neon bulb that lights up at 120 V. Calculate the value of R to make the bulb light up 5 s after the switch has been closed. (log₁₀ 2.5 = 0.4)

(A) 3.3 × 10⁷ Ω

(B) 1.3 × 10⁴ Ω

(C) 1.7 × 10⁵ Ω

(D) 2.7 × 10⁶ Ω

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up? Fat supplies 3.8 × 10⁷ J of energy per kg which is converted to mechanical energy with a 20% efficiency rate. Take g = 9.8 ms^–2 

(A) 6.45 × 10^–3 kg

(B) 9.89 × 10^–3 kg

(C) 12.89 × 10^–3 kg

(D) 2.45 × 10^–3 kg

Two similar springs P and Q have spring constants K_P and K_Q such that K_P > K_Q. They are stretched first by the same amount (case a), then by the same force (case b). The work done by the springs W_P and W_Q are related as, in case (a) and case (b), respectively 

(A) W_P = W_Q ; W_P > W_Q

(B) W_P = W_Q ; W_P = W_Q

(C) W_P > W_Q ; W_Q > W_P

(D) W_P < W_Q ; W_Q < W_P

A ball is thrown vertically downwards from a height of 20 m with an initial velocity v₀². It collides with the ground, loses 50 percent of its energy in collision and rebounds to the same height. The initial velocity v₀ is (Take g = 10 ms^–2)

(A) 10 ms^–1

(B) 14 ms^–1

(C) 20 ms^–1

(D) 28 ms^–1

A block of mass 2 kg is free to move along the x-axis. It is at rest and from t = 0 onwards it is subjected to a time-dependent force F(t) in the x direction. The fore F(t) varies with t as shown in the figure. The kinetic energy of the block after 4.5 seconds is

Two small particles of equal masses start moving in opposite directions from a point A in a horizontal circular orbit. Their tangential velocities are v and 2v respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at A, these two particles will again reach the point A?

A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure it?

The dimensional formula for Reynold’s number is

(A) [L⁰ M⁰ T⁰]

(B) [L¹ M¹ T¹]

(C) [L^–1 M¹ T¹]

(D) [L¹ M¹ T^–1]

In an experiment four quantities a, b, c and d are measured with percentage error 1%, 2%, 3% and 4% respectively. Quantity P is calculated as follows :  . % error in P is

The density of a solid ball is to be determined in an experiment. The diameter of the ball is measured with a screw gauge, whose pitch is 0.5 mm and there are 50 divisions on the circular scale. The reading on the main scale is 2.5 mm and that on the circular scale is 20 divisions. If the measured mass of the ball has a relative error of 2%, the relative percentage error in the density is

.Which of the following units denotes the dimensions ML²/Q², where Q denotes the electric charge? 

An electric dipole is placed at an angle of 30° with an electric field intensity 2 × 10⁵ N/C. It experiences a torque equal to 4 N m. The charge on the dipole, if the dipole length is 2 cm, is

A combination of capacitors is set up as shown in the figure. The magnitude of the electric field, due to a point charge Q (having a charge equal to the sum of the charges on the 4 μF and 9 μF capacitors), at a point distant 30 m from it, would equal : 

A, B and C are three points in a uniform electric field. The electric potential is

Three concentric metallic spherical shells of radii R, 2R, 3R, are given charges Q₁, Q₂, Q₃, respectively. It is found that the surface charge densities on the outer surfaces of the shells are equal. Then, the ratio of the charges given to the shells, Q₁ : Q₂ : Q₃, is

Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle of 30° with each other. When suspended in a liquid of density 0.8 g cm^–3, the angle remains the same. If density of the material of the sphere is 1.6 g cm^–3, the dielectric constant of the liquid is

When positively charged particle falling vertically downward, then the particle deflected due to earth magnetic field towards

A closed-loop (of any shape) carrying current is lying in the x-y plane. A uniform magnetic field B is present in the region such that the loop experiences zero force :

The dots in the figure show a magnetic field perpendicular to the plane of the paper and coming out of it. The curve ABC shows the trajectory of a particle in the plane of the paper. What is a particle?

A galvanometer having a resistance of 8 ohms is shunted by a wire of resistance 2 ohms. If the total current is 1 amp, the part of it passing through the shunt will be :

A galvanometer has 30 divisions and a sensitivity 16μA/div. It can be converted into a voltmeter to read 3 V by connecting (approximately):

The magnetic field due to a short magnet at a point on its axis at distance X cm from the middle point of the magnet is 200 Gauss. The magnetic field at a point on the neutral axis at a distance X cm from the middle of the magnet is

A uniform magnetic field, parallel to the plane of the paper existed in space initially directed from left to right. When a bar of soft iron is placed in the field parallel to it, the lines of force passing through it will be represented by