Hey!!! As per your demand here I am providing you KVPY Stream SB SX Sample Paper of paper 1

CHEMISTRY
The gas that has the slowest rate of diffusion among O2, H2, CO2 and CH4 is
(A) O2
(B) H2
(C) CO2
(D) CH4

Assuming ideal behaviour the ratio of kinetic energies of 3 g of H2 and 4g of O2 at any temperature is
(A) 3 : 4
(B) 1 : 16
(C) 4 : 3
(D) 12 : 1

The shape of the molecule CIF3 is
(A) triangular
(B) pyramidal
(C) T-shape
(D) linear

The ratio of the heat capacities Cp/Cv for one mole of a gas is 1.67. The gas is :
(A) He
(B) H2
(C) CO2
(D) CH4

The ion that is isoelectronic with CO is
(A) O2+
(B) O2
–(C) CN–
(D) N2+

Among CH4, CO2, H2O and SO2, the bond angle is the highest in
(A) CH4
(B) CO2
(C) H2O
(D) SO2

The solvent of choice for carrying out a Grignard reaction is
(A) diethyl ether
(B) chloroform
(C) ethyl acetate
(D) ethanol

The reaction of butanal with n-propylmagnesium bromide gives a
(A) chiral secondary alcohol
(B) achiral secondary alcohol
(C) chiral tertiary alcohol
(D) achiral tertiary alcohol

The hybridization of Ni centre in Ni[(PPh3)2Cl2] and [NiCl4]2– respectively are
(A) dsp2 and sp3
(B) dsp2 and sp2d
(C) sp3 and sp3
(D) sp3 and dsp2

Oxalic acid when treated with potassium permanganate in the presence of an acid, produces
(A) O2
(B) C
(C) CO
(D) CO2

The equilibrium constant for the reaction N2 + 3H2 2NH3 at 400 K is 41. The equilibrium constant for the reaction 1/2N2 + 3/2H2 NH3 at the same temperature will be closest to
(A) 41
(B) 20.5
(C) 6.4
(D) 1681

In a one component second order reaction, if the concentration of the reactant is reduced to half, the rate
(A) increases two times
(B) increases four times
(C) decreases to one half
(D) decreases to one fourth




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