Calcium burns in nitrogen to produce a white powder which dissolves in sufficient water to produce a gas (A) and alkaline solution. The solution on exposure to air produce a thin solid layer of (B) on the surface. Indentity the compound (A) and (B)

An element (A) of group 2 gives brick red colour in the Bunsen flame. (A) burns in nitrogen atmosphere to give (B) , which gets hydrolysed to produce gas (C ) and an alkaline solution (D) . The solution (D) on exposure to air produces a thin solid layer (E) on the surface. Identify (D) .

Which one of the following salts will produce an alkaline solution while dissolving in water ?

NAME: A gas which dissolves in water to give alkaline solution .

A metal M reaccts with nitrogen to give nitride which on reaction with water produces ammonia gas. Metal M can be

Anhydrous white solid (A) on addition of potassium iodine solution gave a brown precipitate which turned white (B) on addition of excees of hypo solution. When potasium cyanide is added to an aqeous Solution of (A) a white precipitate is formed which then dissolved in excess forming (C ) A Solution (%) of (A) on adding to a solution of white portion of egg produced violet colouration in alkaline medium (i.e) in presence of NaOH) identify compound (A) and explain the reactions.

0.2 mole of HCI and 0.2 mole of barium chloride were dissolved in water to produce a 500mL solution. The molarity of the CI^- ions is :

0.2 mole of HCI and 0.2 mole of barium chloride were dissolved in water to produce a 500mL solution. The molarity of the CI^- ions is :

Zinc dissolves in concentrated NaOH solution to produce dihydrogen as well as dioxygen gas.

Sodium reacts with oxygen to produce sodium oxide, which dissolves in water to form sodium hydroxide. On adding hydrochloric acid to the base solution, salt and water are produced. Write balanced chemical equations to represent all the reactions stated in the question.