Periodic Properties And Variation Of Properties Physical And Chemical — Chemistry STD 10 — Question

When concentrated sulphuric acid reacts with NaOH, the product formed is :

An aqueous solution of a compound sodium hydroxide reacts with :
P Aqueous zinc sulphate to form a white precipitate which dissolves when sodium hydroxide is in excess,
Q Aluminium sulphate solution to form a white precipitate which is insoluble when sodium hydroxide is in excess.
Which statements are correct?

One volume of ethene gas burns completely in oxygen. If the temperature and pressure of both gases is same, the volume of oxygen required is:

As the pH of solution decreases, its acidic strength progressively __________.

Choose the correct alternative :
The gas laws which relates the volume of a gas to the number of molecules of the gas is :

Which is not a correct statement?
When Na₂CO₃ is treated with dilute hydrochloric acid :

One volume of water at room temperature will absorb :

During electrolytic reduction of alumina, the electrolyte is covered with coke powder :

Assertion (A): Ionisation potential decreases on moving down the group.
Reason (R): The successive addition of shells overweighs the increased nuclear charge down the group.