What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) Temperature of the solution decreases
(ii) Temperature of the solution increases
(in) Temperature of the solution remains the same
(iv) Salt formation takes place
(ii) and (iv)
When hydrogen chloride gas is prepared on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to
Explaination: Reason: Guard tube drys (absorbs water) from calcium chloride on a humid day.
Which one of the following salts does not con-tain water of crystallisation?
In terms of acidic strength, which one of the following is in the correct increasing order?
What is formed when zinc reacts with sodium hydroxide?
Explaination: Reason: Zn + 2NaOH → Ma2Zn02 (Sodium Zincate) + H2