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

Give one example : A basic oxide which is insoluble in water.

Give one example : A hydroxide which is insoluble in water.

Give one example : A weak mineral acid.

Give one example : A base which is not an alkali.

Give one example : An oxide which is a base.

Give one example : A hydrogen containing compound which is not an acid.

Write the balanced equation for the preparation of the following compound (as the major product) starting from iron and other substance:

Iron (III) chloride

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, 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.