211.

What is the effect of having the pressure by doubling the volume on the following system at 500°C?

H₂ (g) + I₂ (g) $\rightleftharpoons$ 2HI (g)

• Shift to reactant side

• Shift to product formation

• Liquefaction of HI

• No effect

The number of coulombs required to reduce 12.3 g of nitrobenzene to aniline is :

• 115800 C

• 5790 C

• 28950 C

• 57900 C

The strength in volumes of a solution containing 30.36 g/L of H₂O₂ is:

• 10 volume

• 20 volume

• 5 volume

• None of these

Which of the following concentration units is independent of temperature ?

• Normality

• Molarity

• Formality

• Molality

How many moles of Al₂(SO₄)₃ a would be in 50 gm of the substance ?

• 0.083 mol

• 0.952 mol

• 0.481 mol

• 0.140 mol

If 3.01 × 10²⁰ molecules are removed from 98 mg of H₂SO₄, then number of moles of H₂SO₄ left are

• 0.1 × 10^-3 mol

• 9.95 × 10^-2 mol

• 0.5 × 10^-3 mol

• 1.66 × 10^-3 mol

One mole of CO₂ contains:

• 3g atoms of CO₂

• 18.1 × 10²³ molecules of CO₂

• 6.02 × 10²³ atoms of O

• 6.02 × 10²³ atoms of C

Equal moles of water and urea are taken in a flask. What is mass percentage of urea in the solution?

• 23.077%

• 230.77%

• 2.3077%

• 0.23077%

Volume of water needed to mix with 10 mL N HCl to get 0.1 N HCl is:

• 900mL

• 9mL

• 90mL

• 100mL

The mass of 1 mole of electron is

• 9.1 × 10^-28 g

• 1.008 mg

• 0.55 mg

• 9.1 × 10^-27 g