When `16.8g` of white solid X was heated, `4.4 g `of acid gas A that turned lime water milky was driven off together with `1.8 g` of a gas B which condensed to a colourless liquid. The solid that remained Y dissolved in water to give an alkaline solution , which with excess barium chloride solution gave a white precipitate Z .THe precipitate effervence with acid giving carbon dioxide. identify A,B and Y and write the equation for the decomposition of X

Explanation

To solve the problem, we need to identify the substances A, B, and Y, and write the equation for the decomposition of the white solid X. Let's break it down step by step.

### Step 1: Analyze the Given Information
We are given:
- A white solid X weighing 16.8 g.
- Upon heating, it releases:
- 4.4 g of gas A, which turns lime water milky.
- 1.8 g of gas B, which condenses to a colorless liquid.
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