List of top Questions asked in NEET (UG)

Which one of the following compounds is not a protonic acid:

Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms:

The oxidation states of sulphur in the anions SO₃^2–, S₂O₄^2– and S₂O₆^2– follow the order- 

The pyknometric density of sodium chloride crystal is 2.165×10³ kg m^–3 while its X-ray density is 2.178×10³ kg m^–3. The fraction of unoccupied sites in sodium chloride crystal is:

For the reaction: \(C_3H_8(g)+5O_2(g)→3CO_2(g)+4H_2O(l)\) at constant temperature, ∆H–∆E is:

The reaction quotient (Q) for the reaction \(N_2(g) + 3H_2(g)⇋2NH_3(g)\) is given by \(Q =\frac { [NH_3]^2}{[N_2][H_2]^3}\). The reaction will proceed from right to left if: (where K_C is the equilibrium constant)

Which of the following statements is not true:

The method of zone refining of metals is based on the principle of:

On the basis of the information available from the reaction: \(\frac 43 Al+O_2→\frac 23 Al_2O_2\), ∆G = -827 KJ mol^-1 of O₂, the minimum e.m.f. required to carry out electrolysis of Al₂O₃ is (F = 96500 C mol^–1)

The reaction \(\text {A→B}\) follows first order kinetics. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1 hour. What is the time taken for conversion of 0.9 mole of A to produce 0.675 mole of B.

The solubility product of AgI at 25ºC is 1.0×10^–16 mol²L^–2. The solubility of AgI in 10^–4N solution of KI at 25ºC is approximately (in mol L^–1):

For which one of the following equations is ∆Hº_react equal to ∆Hº_f for the product:

The molar heat capacity of water at constant pressure, C, is 75 JK^–1mol^–1. When 1.0 KJ of heat is supplied to 100 g of water which is free to expand, the increase in temperature of water is:

Which one of the following characteristics of the transition metals is associated with their catalytic activity:

According to the adsorption theory of catalysis, the speed of the reaction increase because:

The number of unpaired electrons in the complex ion \([CoF_6]^{3–}\) is: (Atomic No.of Co = 27) 

Which one of the following octahedral complexes will not show geometric isomerism? (A and B are monodentate ligands)

Which of the following orders of acid strength is correct: 

Given below are four matchings of an animal and its kind of respiratory organ:

1. Silver fish – trachea
2. Scorpion – book lung
3. Sea squirt – pharyngeal gills
4. Dolphin – skin

The correct matchings are:
 

The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit). The binding energy of  \(_2^4 He\) is (Given: helium nucleus mass ≈ 4.0015 u) 

Barrier potential of a p-n junction diode does not depend on:

If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be:

A n-p-n transistor conducts when

J.J. Thomson's cathode-ray tube experiment demonstrated that

Reverse bias applied to a junction diode