Can dry HCl turn blue litmus red?

Phenols turn blue litmus red

Dry hydrogen chloride gas does not turn blue litmus red whereas hydrochloric acid does. Give one reason.

Mark 'T' if the statement is true and 'F' if it is false:- Sodium hydroxide turns blue litmus red.

Sulphuric acid turns blue litmus red.

A basic solution turns blue litmus red.

Select the substance from the following list which turn blue litmus solution red: Tomato juice Tooth paste Milk of magnesia Coffee Wine Household ammonia Vinegar Battery acid

A water soluble compound 'X' of sodium on reacting with dil. H_2SO_4 released a colourless gas accompanied by brisk effervescence. When the gas was passed through water, the solution obtained turned blue litmus solution red. On bubling the gas through lime water, it initially became milky and the milkness disappeared when the gas was passed in excess. Identify the substance 'X' and write the chemical equation for the reactions involved.