When a metal X reacts with dilute HCl, bubbles of gas Y are formed. When this metal reacts with cold water, gas Y is produced again. Identify X and Y from the following.1 pointX:- Calcium, Y:- OxygenX:- Potassium, Y:- OxygenX:- Sodium, Y:- HydrogenX:- Copper, Y:- HydrogenClear selection
Question
When a metal X reacts with dilute HCl, bubbles of gas Y are formed. When this metal reacts with cold water, gas Y is produced again. Identify X and Y from the following.1 pointX:- Calcium, Y:- OxygenX:- Potassium, Y:- OxygenX:- Sodium, Y:- HydrogenX:- Copper, Y:- HydrogenClear selection
Solution
The correct answer is X:- Sodium, Y:- Hydrogen.
Here's why:
When a metal reacts with an acid, it generally produces a salt and hydrogen gas. So, the gas Y produced when metal X reacts with dilute HCl is hydrogen.
Also, only certain metals react with cold water to produce hydrogen gas. These are typically very reactive metals like sodium, potassium, and calcium. However, among the options given, only sodium is known to react with cold water to produce hydrogen gas.
Therefore, X is Sodium and Y is Hydrogen.
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