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

What is meant by the term weak acid?

Give the name and formula of the acid salt which gives sodium ions and sulphate ions in solution.

Define Acid.

Write the balanced equations for the reaction required to convert insoluble lead (II) oxide into insoluble lead chloride.

If iron reacts with dilute sulphuric acid, what will be the products?

From the formulae listed below, choose one in each case corresponding to the salt having the given description :
AgCI, CuCO_3, CuSO4.5H₂O, KNO_3, NaCI, NaHSO_4, Pb(NO₃), ZnCO₃, ZnSO₄.7H₂O
(a) An acid salt
(b) An insoluble chloride 
(c) On treating with concentrated sulphuric acid, this salt changes from blue to white.
(d) On heating this salt changes from green to black.
(e) This salt gives nitrogen dioxide on heating

Choosing the correct words given in brackets, complete the sentence given below:
An acid is a compound which, when dissolved in water gives ______ ( hydronium / hydroxide) ions as the only ______ (positive/negative) ions.

Choosing the correct words given in brackets, complete the sentence given below:
A(n) ______ (acid/basic) salt is one in which the hydrogen of an acid has been partially replaced by a ______ (metal/non-metal).

Macth the following.

What is the term defined by the following?

A salt containing a metal ion surrounded by other ions or molecules.

Solution A is strong acid B weak acid C strong alkali.

Which solution contains solute molecules in addition to water molecules?

Select the correct answer from the choices a,b,c and d which are given.Write only the letter corresponding to the correct answer.
An example of a complex salt is

Name a white, insoluble oxide that dissolves when fused with caustic soda or caustic potash.

Using sodium hydroxide solution, how will you distinguish: Zinc nitrate solution from calcium nitrate solution

Using sodium hydroxide solution, how will you distinguish:
Iron (II) chloride from iron (III) chloride

Using sodium hydroxide solution, how will you distinguish:
Lead hydroxide from magnesium hydroxide.

Sodium hydroxide solution is added to solution A. A white precipitate is formed which is soluble in excess sodium hydroxide. Name the metal ion present in A.

Write equation for the reaction that will take place when copper sulphate solution is added to sodium hydroxide solution.

Three test tubes contain calcium nitrate solution, zinc nitrate solution and lead nitrate solution respectively. Each solution is divided into two portions (i) and (ii). Describe the effect of

1. adding sodium hydroxide solution to each portion in turn till it is in excess.
2. adding ammonium hydroxide to each portion in turn till it is in excess.

State what do you observe when:
Neutral litmus solution is added to alkaline solution