List of top Questions asked in NEET (UG)- 2003

The chief advantage of encystment to an Amoeba is:

Which one of the following is categorised under living fossils:

ELISA is used to detect viruses where the key reagent is:

Tobacco mosaic virus is a tubular filament of size:
Mycorrhiza is an example of:
Phenetic classification is based on:
Which one of the following statements about viruses is correct:
Coconut milk factor is:
Which one of the following triplet codes, is correctly matched with its specificity for an amino acid in protein synthesis or as start or stop codon:

A thin circular ring M and radius ‘r’ is rotating about its axis with a constant angular velocity ω. Four objects each of mass m, are kept gently to the opposite ends of two perpendicular diameters of the ring. The angular velocity of the ring will be - 

A solid cylinder of mass M and radius R rolls without slipping down an inclined plane of length L and height h. What is the speed of its centre of mass when the cylinder reaches its bottom-
When a long spring is stretched by 2 cm, its potential energy is U. If the spring is stretched by 10 cm, the potential energy stored in it will be:
The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a height of 2m on the surface of A. What is the height of jump by the same person on the planet B.
A man weighs 80 kg, he stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5 m/s2. What would be the reading on the scale? (g=10 m/s2) 
The ions \(O_2^–\), \(F^–\),  \(Na^+\), \(Mg^{2+}\) and \(Al^{3+}\) are isoelectronic. Their ionic radii show:
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 SO32–, S2O42– and S2O62– 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 KC is the equilibrium constant)
Which of the following statements is not true:
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):