Element (A) burns in nitrogen to give an ionic compound, `(B)` reacts with water to give (C) and (D). A solution of (C) becomes milky on bubbling carbon dioxide. Idendity (A),(B),(C) and (D)

The element A burns in nitrogen to give an ionic compound B. the compound B reacts with water to give C and D. A solution of C becomes milkly on bubbling carbon dioxide. What is the natrue of compound (D)?

alkali metal (A) on flame test gives a crimson red colour to the Bunsen flame. (A) on heating in air gives compound (B), and (B) further on hydrolysis gives (C ) and gas (D). Gas (D) with Nessler's reagent gives a brown precipitate Identify (A), (B), (C ) and (D).

Magnesium on heating in air gives (A) and (B) . On reaction with water (B) gives a colourless gas (C ).(C ) when passed through CuSO_(4) solution, gives a blue coloured solution (D) . Identify (C ) and (D) .

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) .

CaCO_3 on heating gives a white solid (A) and a gas (B), (A) on heating with carbon gives a solid (C) and a gas (D), (C) on hydrolysis glves a gas (E) and a solid (F) Identify (A), (B), (C), (D) , (E) and (F) .

Compound (A), C_(8)H_(6)NOBr , is optically active. Reduction of (A) gives (B) which reacts with nitrouos acid to form (C), dihydric alcohol. Benzene sulphonyl chloride reacts with (B) to give a product soluble in NaOH. Hydrolysis of (A) gives (D) which is an optically active acid. (A) does not give any precipitate with aqueous AgNO_(3) . Controlled oxidation of (A) gives monobromo benzoic acid. Compound (A) on reaction with Br_(2)//Fe gives only one compound. Identify (A), (B), (C), and (D).

An alkali metal A gives a compound B (molecular mass = 40) on reacting with water. The compound B gives a soluble compound C on treatment with aluminium oxide. Identify A, B and C and give the reactions involved.

Identify (A) to ( E) . (a) An inorganic iodide (A) on heating with a solution of KOH gives a gas (B) and the solution of a compound ( C) . (b) The gas (B) on ignition air gives a compound (D) and water. ( C) Copper sulphate is reduced to the metal on passing (B) through the solution. (d) A precipitate of the compound ( E) is formed on reaction of ( C) with copper sulphate solution.