Acetic acid was added to a solid 'X' kept in a test tube. A colourless and odourless gas was evolved. The gas turned lime water milky when passed through it. Predict the nature of the solid.

The gas that turns lime water milky is

Varun took a sample A and added dilute hydrochloric acid to it. A colourless, odourless gas X was evolved which turned lime water milky. Identify sample A and the gas X evolved. Write a chemical equation to explain the reaction between Sample A and Hydrochloric acid. Why does the gas X turn lime water milky?

(a) When concentrated sulphuric acid was added to an unknown salt present in a test tube a brown gas (A) was evolved. This gas intensified when copper turnings were added to this test tube.On cooling the gas (A) changed into a colourless solid (B). Identify (A) and (B). Writen chemical reactions involved. (b) Drawn structure of XeOF_(4).

(a) When concentrated sulphuric acid was added to an unknown salt present in a test tube a brown gas (A) was evolved . This gas intensified when copper turnings were added to this test tube . On cooling, the gas (A) changed into a colourless solid (B) . (i) Identify (A) and (B). (ii) Write the structures of (A) and (B). (iii) Why does gas (A) change to solid on cooling ? (b) Arrange the following in the decreasing order of their reducing character : HF , HCl , HBr , HI (c) Complete the following reaction : XeF_(4) + SbF_(5) to

When is passed through fresh lime water, it turns milky.