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

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, Hydroxide, Precipitate, Salt, Water.

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 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

Name: Two bases which are not alkalis but dissolve in strong alkalis.

Name a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.

Name the chloride of a metal which is soluble in excess of ammonium hydroxide.

Name : A yellow monoxide that dissolves in hot and concentrated caustic alkali.