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# NEET Chemistry Solved Question Paper 2007

#### Multiple Choice Questions

1.

What is the frequency of a X-ray photon whose momentum is 1.1 x 10-23 kg-ms-2?

• 5 x 1016 Hz

• 0.5 x 1027 Hz

• 0.5 x 1018 Hz

• 5 x 1018 Hz

D.

5 x 1018 Hz

What is the frequency of a X-ray photon whose momentum is 1.1 x 10-23 kg-ms-2?

2.

The bond energy is the energy required to :

• dissociate one mole of the substance

• dissociate bond in 1 kg of the substance

• break one mole of similar bonds

• break bonds in one mole of the substance

C.

break one mole of similar bonds

The bond energy is the energy required to :

3.

The magnitude of orbital angular momentum ofan electron of azimuthal quantum number 2 is :

• $\frac{2\mathrm{h}}{2\mathrm{\pi }}$

• $\frac{\sqrt{6}\mathrm{h}}{2\mathrm{\pi }}$

• $\frac{\sqrt{2}\mathrm{h}}{2\mathrm{\pi }}$

• $\frac{6\mathrm{h}}{2\mathrm{\pi }}$

B.

$\frac{\sqrt{6}\mathrm{h}}{2\mathrm{\pi }}$

The magnitude of orbital angular momentum ofan electron of azimuthal quantum number 2 is :

4.

Heisenberg's uncertainty principle can beexplained as :

• $∆$$⩾$

• $\mathrm{∆}$x x $∆$$⩾$ $\frac{\mathrm{h}}{4\mathrm{\pi }}$

• $∆$x x $∆$$⩾$ $\frac{\mathrm{h}}{\mathrm{\pi }}$

• $∆$$⩾$ $\frac{\mathrm{\pi h}}{∆\mathrm{x}}$

B.

$\mathrm{∆}$x x $∆$$⩾$ $\frac{\mathrm{h}}{4\mathrm{\pi }}$

Heisenberg's uncertainty principle can beexplained as :

5.

The geometry of methane molecule is :

• tetrahedral

• pyramidal

• octahedral

• square planar

A.

tetrahedral

The geometry of methane molecule is :

6.

The pH of a 0.02 M solution of HCl is :

• 2.2

• 2.0

• 0.3

• 1.7

D.

1.7

The pH of a 0.02 M solution of HCl is :

# 7.Heat of neutralisation of an acid with a base is 13. 7 kcal when :both acid and base are weak acid is weak and base is strong both acid and base are strong acid is strong and base is weak

C.

both acid and base are strong

Heat of neutralisation of an acid with a base is 13. 7 kcal when :

8.

Hess's law is based on :

• law of conservation of mass

• law of conservation of energy

• enthalpy is a state function

• none of the above

B.

law of conservation of energy

Hess's law is based on :

9.

The heat of formarion of CO2 is - 393 kJ mol-1 .The amount of heat evolved in the formation of0.156 kg of CO2 .

• - 1393 kJ

• + 1165.5 kJ

• + 1275.9 kJ

• - 1165.5 kJ

A.

- 1393 kJ

The heat of formarion of CO2 is - 393 kJ mol-1 .The amount of heat evolved in the formation of0.156 kg of CO2 .

10.

The solubility product of Mg(OH)2 at 25°C is1.4 x 10-11 .What is the solubility of Mg(OH)2in g/L ?

• 0.0047 g/L

• 0.047 g/L

• 0.0087 g/L

• 0.087 g/L

C.

0.0087 g/L

The solubility product of Mg(OH)2 at 25°C is1.4 x 10-11 .What is the solubility of Mg(OH)2in g/L ?