AP EAMCET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
Which of the following pairs of reactions give \(\mathrm{H}_2\) gas as a product upon hydrolysis?
- A (i) \(\mathrm{Ba} \xrightarrow{\mathrm{H}_2 \mathrm{O}}\) Products
(ii) \(\mathrm{BaO}_2 \xrightarrow{\mathrm{H}_2 \mathrm{O}}\) Products - B (i) \(\mathrm{Ca} \xrightarrow{\mathrm{H}_2 \mathrm{O}}\) Products
(ii) \(\mathrm{CaH}_2 \xrightarrow{\mathrm{H}_2 \mathrm{O}}\) Products - C (i) \(\mathrm{K} \xrightarrow{\mathrm{H}_2 \mathrm{O}}\) Products
(ii) \(\mathrm{K}_2 \mathrm{O} \xrightarrow{\mathrm{H}_2 \mathrm{O}}\) Products - D (i) \(\mathrm{Na} \xrightarrow{\mathrm{H}_2 \mathrm{O}}\) Products
(ii) \(\mathrm{Na}_2 \mathrm{O}_2 \xrightarrow{\mathrm{H}_2 \mathrm{O}}\) Products
Answer & Solution
Correct Answer
(B) (i) \(\mathrm{Ca} \xrightarrow{\mathrm{H}_2 \mathrm{O}}\) Products
(ii) \(\mathrm{CaH}_2 \xrightarrow{\mathrm{H}_2 \mathrm{O}}\) Products
Step-by-step Solution
Detailed explanation
When calcium metal is dropped in water, it begins to bubble vigorously and react with the water, producing hydrogen gas and a cloudy white precipitate of calcium hydroxide.…
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