11.

Angle strain in cyclopropane is

• 24°44'

• 9°44'

• 44'

• -5°16'

The number of antibonding electron pairs in O${}_2^{2-}$ molecular ion on the basis of molecular orbital theory is (Atomic number of O is 18)

• 5

• 4

• 3

• 2

Hydroxyl ion concentration of 10^-2 M HCl is

• 1 × 10¹ mol dm^-3

• 1 × 10^-12 mol dm^-3

• 1 × 10^-1 mol dm^-3

• 1 × 10^-14 mol dm^-3

Mg²⁺ is isoelectronic with

• Cu²⁺

• Zn²⁺

• Na⁺

• Ca²⁺

Gram molecular volume of oxygen at STP is

• 3200 cm³

• 5600 cm³

• 22400 cm³

• 11200 cm³

The electronic configuration of Cr³⁺ is

• [Ar] 3d⁴ 4s²

• [Ar] 3d³ 4s⁰

• [Ar] 3d² 4s¹

• [Ar] 3d⁵ 4s¹

What is the equivalent weight of SnCl₂ in the following reaction?

SnCl₂ + Cl₂ → SnCl₄

• 95

• 45

• 60

• 30

Entropy of the universe is

• constant

• zero

• continuously decreasing

• continuously increasing

Which one of the following salts on being dissolved in water gives pH > 7 at 25°C?

• KCN

• KNO₃

• NH₄Cl

• NH₄CN

The volume of 10 N and 4 N HCl required to make 1 L of 7 N HCl are

• 0.50 L of 10 N HCl and 0.50 L of 4 N HCl

• 0.60 L of 10 N HCl and 0.40 L of 4 N HCl

• 0.80 L of 10 N HCl and 0.20 L of 4 N HCl

• 0.75 L of 10 N HCl and 0.25 L of 4 N HCl