Question

Which line of properties (A,B,C, or D) correctly lists porperties of the hydrides of these elements?

$X=C$

$Y=Na$

$Z=Br$

	Hydride of X	Hydride of Y	Hydride of Z
(A)	Colourless gas insoluble in $H_2$	Silver/grey solid, reacts with $H_{2}O$ to form an alkaline solution	Colourless gas form a strong acid in $H_{2}O$
(B)	Colourless liquid, no reaction with $H_{2}O$	Silver/grey solid, forms $H_{2}O$	Ionic solid with formula $ZH$
(C)	Colourless gas found naturally	Does not conduct electricity in the molten state	Colourless gas, reacts with $C{l}_2$
(D)	Non-polar compound reacts with $C{l}_2$ in light	Silver/grey ionic solid with formula $Y{H}_2$	Forms when water is added to phosphorus and element Z

• A. (A)
• B. (B)
• C. (C)
• D. (D)

Answer 1

The correct option is A (A)

Methane is a colorless gas insoluble in water.
Sodium hydride is a silver/grey solid. It reacts with water to form an alkaline solution of sodium hydroxide.
Hydrogen bromide is a colorless gas which forms hydrobromic acid - a strong acid in water.