NEET 2007 Question Paper with Solutions

A black body is at \(727^\circ C\). It emits energy at a rate which is proportional to

A particle of mass m moves in the XY plane with a velocity v along the straight line AB. If the angular momentum of the particle with respect to origin O is \(L_A\) when it is at A and \(L_B\) when it is at B, then

Dimensions of resistance in an electrical circuit, in terms of dimension of mass M, of length L, of time T and of current I, would be

A particle executes simple harmonic oscillation with an amplitude a. The period of oscillation is T. The minimum time taken by the particle to travel half of the amplitude from the equilibrium position is

A mass of 2.0 kg is put on a flat pan attached to a vertical spring fixed on the ground as shown in the figure. The mass of the spring and the pan is negligible. When pressed slightly and released the mass executes a simple harmonic motion. The spring constant is 200 N/m. What should be the minimum amplitude of the motion so that the mass gets detached from the pan (take g = 10 m/s\(^2\)).

The correct order of C-O bond length among CO, \(CO_3^{2-}\), \(CO_2\) is

In which of the following pairs, the two species are isostructural?

For (i) \(I^-\), (ii) \(Cl^-\), (iii) \(Br^-\), the increasing order of nucleophilicity would be

The correct order of increasing thermal stability of \(K_2CO_3\), \(MgCO_3\), \(CaCO_3\) and \(BeCO_3\) is

Consider the following sets of quantum numbers: n l m s (i) 3 0 0 +1/2 (ii) 2 2 1 +1/2 (iii) 4 3 -2 -1/2 (iv) 1 0 -1 -1/2 (v) 3 2 3 +1/2. Which of the following sets of quantum number is not possible?

What is the value of inductance L for which the current is maximum in a series LCR circuit with C = \(10\ \mu F\) and \(\omega=1000\ \text{s}^{-1}\)?

A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 amp, the efficiency of the transformer is approximately

Which one of the following represents forward bias diode?

If the nucleus \(_{13}^{27}Al\) has a nuclear radius of about 3.6 fm, then \(_{32}^{125}Te\) would have its radius approximately as

A beam of electron passes undeflected through mutually perpendicular electric and magnetic fields. If the electric field is switched off, and the same magnetic field is maintained, the electrons move

The reaction of hydrogen and iodine monochloride is given as: \(H_2(g)+2ICl(g)\rightarrow 2HCl(g)+I_2(g)\). This reaction is of first order with respect to \(H_2(g)\) and \(ICl(g)\), following mechanisms were proposed. Mechanism A: \(H_2(g)+2ICl(g)\rightarrow 2HCl(g)+I_2(g)\); Mechanism B: \(H_2(g)+ICl(g)\rightarrow HCl(g)+HI(g)\) (slow); \(HI(g)+ICl(g)\rightarrow HCl(g)+I_2(g)\) (fast). Which of the above mechanism(s) can be consistent with the given information about the reaction?

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

Identify the incorrect statement among the following:

\(CH_3-CHCl-CH_2-CH_3\) has a chiral centre. Which one of the following represents its R-configuration?