p-Block Element...

Which of the following species is not a pseudohalide?

A gas X with disagreeable odour reduces silver nitrate solution to give metallic silver and is itself oxidised to Y. Y is a dibasic acid with reducing properties. It is slowly oxidised in air to a tribasic acid Z. Though Z is a tribasic acid, it behaves in aqueous solution mostly as a dibasic acid. When a mixture of X and N₂O is subjected to electric spark, Z is obtained.

The gas X is

The following question has four choices, out of which ONLY ONE is correct.

Which of the following statements about SCl₄ is not correct?

The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequence

Which of the following is the strongest acid?q

Fluoride ions are added to toothpaste to

The hybridisation and the geometry of ICl₃ in liquid phase are ____ and _____, respectively.

The following question has four choices, out of which ONLY ONE is correct.

Xe and F2 heated in molar ratio 1 : 20 at 400⁰C give a compound X. X reacts slowly with atmospheric moisture to give Y and HF. When X reacts with small quantity of water, we get a product Z. Z can also be obtained by the interaction of X with silica. Y reacts with X to give Z. But Y and Z react to give XeO₂F₂.

Y is

Which among the following forms basic oxide?

The oxidation state of nitrogen in dinitrogen oxide is

Which of the following statements is incorrect regarding hypophosphorous acid?

The following question has four choices, out of which ONLY ONE is correct.

P₄O₈ reacts with sufficient water to produce

The following question has four choices, out of which ONLY ONE is correct.

Which of the following statements about white phosphorus is true?

The following question has four choices, out of which ONLY ONE is correct.

An inorganic salt (a) is decomposed at about 523 K to give products (b) and (c). Compound (c) is liquid at room temperature and is neutral to litmus paper, while oxide (b) on burning with white phosphorus gives a dehydrating agent (d). Compounds (a), (b), (c) and (d) will be identified respectively as:

The number of lone pairs of electrons in XeO₄ is