(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Chemistry

The preparation of lead sulphate from lead carbonate is a two step process (lead sulphate cannot be prepared by adding dilute sulphuric acid to lead carbonate.)

Write the equation for the reaction that will take place when this first step is carried out.

The preparation of lead sulphate from lead carbonate is a two step process (lead sulphate cannot be prepared by adding dilute sulphuric acid to lead carbonate)

Why is the direct addition of dilute sulphuric acid to lead carbonate an impractical method of preparing lead sulphate?

Fill in the blank.
An acid is a compound which when dissolved in water forms hydronium ions as the only ______ ions.

Fill in the blanks.
A base is a compound which if soluble in water contains ______ ions. A base reacts with an acid to form ______ and water only. This type of reaction is known as ______.

From the list given below. Select the word(s) required to correctly complete the blanks (i) to (v) in the following passage:
Ammonia, Ammonium, Carbonate, Carbon dioxide, Hydrogen, Hydronium,
A solution 'X' turns blue litmus red so it must contain (i) ______ ions; another solution 'Y' turns red litmus blue and therefore must contain(ii) ______ ions. When solutions X and Y are mixed together, the products will be a (iii) ______ and ______ (iv) ______. If a piece of magnesium was put into solution X, (v) ______ gas would be evolved.

What is the term defined below?
A base which is soluble in water.

Fill in the blank from the choices given in bracket.
When a metallic oxide is dissolved in water, the solution formed has a high concentration of ___________ ions. (H⁺,H₃O⁺,OH^-)

Solution A is a sodium hydroxide solution. Solution B is a weak acid. Solution C is dilute sulphuric acid. Which solution will.
(i) Liberate sulphur dioxide from sodium sulphite
(ii) Give a white precipitate with zinc sulphate solution,(iii) Contain solute molecules and ions?

What do you observe when caustic soda solution is added to the following solution: first a little and then in excess : FeCl₃

What do you observe when caustic soda solution is added to the following solution: first a little and then in excess : ZnSO₄

What do you observe when caustic soda solution is added to the following solution: first a little and then in excess : Pb(NO₃)₂

What do you observe when caustic soda solution is added to the following solution: first a little and then in excess : CuSO₄

What is the reaction of freshly precipitated aluminium hydroxide with caustic soda solution? Give equation.

What do you understand by amphoteric oxide? Give the balanced equations for the reaction with three different amphoteric oxides with a caustic alkali. Write your observation if any.

Give two examples of amphoteric hydroxides.

Name a metallic hydroxide soluble in excess of NH₄OH.

Name: A metallic oxide soluble in excess of caustic soda solution.

Name: A strong alkali

Name: A weak alkali.

Name: Two coloured ions