Hydrogen reacts with a metal(A) to give an ionic hydride(B). The metal (A) gives a brick red color with bunsen flame. The hydride formed is commonly known by its trade name . The compound (B) on treating with water gives back H $_{2}$ and (C). Identify the metal A.

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Solution

The correct option is D Ca
The metal A is $C a$ .

(i) $C a$ gives brick red colour with the flame.

(ii) $C a + H_{2} ⟶ C a H_{2}$ ( hydrolith , trade name ).

(iii) $C a H_{2} + 2 H_{2} O ⟶ C a (O H)_{2} + 2 H_{2}$ .

Hence, option D is correct.

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Hydrogen reacts with a metal(A) to give an ionic hydride(B). The metal (A) gives a brick red color with bunsen flame. The hydride formed is commonly known by its trade name . The compound (B) on treating with water gives back H2 and (C). Identify the metal A.

The correct option is D CaThe metal A is Ca.(i) Ca gives brick red colour with the flame.(ii) Ca+H2⟶CaH2 ( hydrolith , trade name ).(iii) CaH2+2H2O⟶Ca(OH)2+2H2.Hence, option D is correct.

Hydrogen reacts with a metal(A) to give an ionic hydride(B). The metal (A) gives a brick red color with bunsen flame. The hydride formed is commonly known by its trade name . The compound (B) on treating with water gives back H $_{2}$ and (C). Identify the metal A.

The correct option is D Ca
The metal A is $C a$ .

(i) $C a$ gives brick red colour with the flame.

(ii) $C a + H_{2} ⟶ C a H_{2}$ ( hydrolith , trade name ).

(iii) $C a H_{2} + 2 H_{2} O ⟶ C a (O H)_{2} + 2 H_{2}$ .

Hence, option D is correct.