40 ml of methane is completely burnt using 80 ml of oxygen at room temperature The volume of gas left after cooling to room temperature is _______.

(a)

40 ml CO₂ gas

(b)

40 ml CO₂ gas and 80 ml H₂O gas

(c)

60 ml CO₂ gas and 60 ml H₂O gas

(d)

120 ml CO₂ gas

The energy of light of wavelength 45 nm is _____________.

(a)

6.67 x 10¹⁵J

(b)

6.67 x 10¹¹J

(c)

4.42 x 10^-18J

(d)

4.42 x 10^-15J

What would be the IUPAC name for an element with atomic number 222?

(a)

bibibiium

(b)

bididium

(c)

didibium

(d)

bibibium

Which of the following statements about hydrogen is incorrect?

(a)

Hydrogen ion, H₃O⁺ exists freely in solution.

(b)

Dihydrogen acts as a reducing agent.

(c)

Hydrogen has three isotopes of which tritium is the most common.

(d)

Hydrogen never acts as cation in ionic salts.

For alkali metals, which one of the following trends is incorrect ?

(a)

Hydration energy: Li > Na > K > Rb

(b)

Ionisation energy: Li > Na > K > Rb

(c)

Density: Li < Na < K < Rb

(d)

Atomic size: Li < Na < K < Rb

Gases deviate from ideal behavior at high pressure. Which of the following statement(s) is correct for non-ideality?

(a)

at high pressure the collision between the gas molecule become enormous

(b)

at high pressure the gas molecules move only in one direction

(c)

at high pressure, the volume of gas become insignificant

(d)

at high pressure the intermolecular interactions become significant

The amount of heat exchanged with surrounding at constant temperature pressure is given by the quantity ______________

(a)

ΔE

(b)

ΔH

(c)

ΔS

(d)

ΔG

If K_b and K_f for a reversible reactions are 0.8 x 10^–5 and 1.6 x 10^–4 respectively, the value of the equilibrium constant is __________

(a)

20

(b)

0.2 x 10^-4

(c)

0.05

(d)

none of these

The molality of a solution containing 1.8g of glucose dissolved in 250 g of water is _____________

(a)

0.2 M

(b)

0.01 M

(c)

0.02 M

(d)

0.04 M

In which of the following Compounds does the central atom obey the octet rule ?

(a)

XeF₄

(b)

AlCl₃

(c)

SF₆

(d)

SCl₂