11.

Heat of formation of SO₂ is -298 kJ. What is the heat of combustion of 4 g of S ?

• + 37 kJ

• -37.15 kJ

• + 298 kJ

• 18.6 kJ

Bond energy of hydrogen gas is - 433 kJ. How much is the bond dissociation energy of 0.5 mole of hydrogen gas ?

• -433 kJ

• +433 kJ

• -216 kJ

• +216 kJ

Among 3^rd row elements atomic size is maximum for

• sodium

• argon

• magnesium

• chlorine

Which one of the following has lowest bond dissociation energy ?

• Cl - Cl

• F - F

• Br - Br

• I - I

In 1- butene number of σ-bonds is

• 8

• 10

• 11

• 12

When any radioactive element emits β particle, some product is obtained. They both are

• isotopes

• isobars

• isomers

• isotoes

Electrical field is used to deflect

• α and β particles

• α and γ particles

• α,  β and γ particles

• β and γ particles

In an isothermal process

• q = 0 and $∆$E = 0

• q ≠ 0 and $∆$E = 0

• q = 0 and $∆$E ≠ 0

• q ≠ 0 and $∆$E ≠ 0

Minimum work is obtained when 1 kg of...gas expanded under 500 kPa to 200 kPa pressure at 0°C

• chlorine

• oxygen

• nitrogen

• methane

The product obtained on fusion of BaSO₄ and Na₂CO₃ is

• BaCO₃

• BaO

• Ba(OH)₂

• BaHSO₄