What are the products formed when moist chlorine gas is reacted with hypo?

• Na₂SO₄, S, HCl

• Na₂SO₃, S, HCl

• Na₂S₄O₆, Na₂SO₃, HCl

• Na₂S₄O₆, NaCl, HCl

What is the bond angle in ClO₂ (OClO)?

• 90°

• 118°

• 105°

• 111°

The hybridisation of Xe and the number of lone pairs of electrons on it in XeF₆ are

• sp³d², 1

• sp³d³, 2

• sp³d², 2

• sp³d³, 1

0.16 g of an organic compound containing sulphur produces 0.233 g of BaSO₄. Percentage of sulphur in the compound is

• 20

• 80

• 50

• 10

Which one of the following cannot form an amphoteric oxides?

• Al

• Sn

• Sb

• P

Which one of the following is not correct?

• Pyrophosphoric acid is a tetrabasic acid.

• Pyrophosphoric acid contains P-O-P linkage. Pyrophosphoric acrd contains two P-H bonds.

• Pyrophosphoric acid contains two P-H bonds.

• Orthophosphoric acd can be prepared by dissolvng P₄O₁₀ in water.

Liquid X is used in bubble chamber to detect neutral mesons and gamma photons. Then, X is

• He

• Ne

• Kr

• Xe

The catalyst and promoter respectively used in the Haber's process of industrial synthesis of ammonia are

• Mo,V₂O₅

• V₂O_5, Fe

• Fe, Mo

• Mo, Fe

Bond energy of Cl₂, Br₂ and I₂ follow the order

• Cl₂ >Br₂ > I₂

• Br₂ >Cl₂ > I₂

• I₂ > Br₂ >Cl₂

• I₂ > Cl₂ >Br₂

Assertion (A): The boiling points of noble gases increases from He to Xe.

Reason (R): The interatomic van der Waals' attractive forces increases from He to Xe.

The correct answer is:

• Both (A) and (R) are true, and (R) is the correct explanation of (A).

• Both (A) and (R) are true, and (R) is not the correct explanation of (A).

• (A) is true but (R) is not true.

• (A) is not true but (R) is true.