Acids,Bases and Salts — Chemistry STD 10 — Question

On moving from left to right in a given period, the number of shells ________ .

The electrolysis of acidified water is an example of: [Board Question].

Which of the following metal will not react with dilute sulphuric acid?

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?

Match the following:

	Chemical Processes		Results
(i)	Synthesis of Hydrogen Chloride	(p)	Results in a highly acidic solution.
(ii)	Polar Nature of HCl	(q)	Utilises a direct combination of hydrogen and chlorine gases.
(iii)	Reaction of HCl with Ammonia	(r)	Due to the electronegativity difference between hydrogen and chlorine.
(iv)	Solubility of HCl in Water	(s)	Formation of white fumes of ammonium chloride.

A solution of compound A reacts with concentrated hydrochloric acid to give a thick curdy white precipitate B and nitric acid. What are the compounds A and B?

During laboratory preparation of nitric acid, it is pale yellow in colour, because :

The correct reaction between caustic soda solution and aluminium oxide is.

Which of the following do no possess any unit?

Assertion : Tap water conducts electricity but distill water does not conducts electricity.
Reason : Tap water conducts electricity as it contains ions whereas distilled water does not contain ions.