(English Medium) ICSE Class 10 - CISCE Important Questions

State one observation for each of the following  : 
Lead nitric is heated strongly in a test tube. 

The pH values of three solutions A, B and C are given in the table. Answer the following questions:

1. Which solution will have no effect on litmus solution?
2. Which solution will liberate CO₂ when reacted with sodium carbonate?
3. Which solution will turn red litmus solution blue?

 The pH values of three solutions A, B and C are given in the table. Answer the folloiwng questions: 

 Which solution will liberate CO₂ when reacted with sodium carbonate? 

 Name the particles present in : 
Strong electrolyte 

 Choose the method of preparation of the following salts, from the methods given in the list:
[List :  A. Neutralization B. Precipitation  C. Direct combination D. Substitution ]
(i) Lead chloride
(ii) Iron (II) sulphate
(iii) Sodium nitrate

(iv) Iron (III) chloride 

The acid which does not form acid salt by a basic radical.

State the terms/process for the following:

A type of salt formed by partial replacement of hydroxyl radicals with an acid radical.

Match the salts underlined in Column A with the most suitable method of preparation given in Column B.

You are provided with the list of chemicals mentioned below in the box:

Using suitable chemicals from the list given, write a balanced chemical equation for the preparation of the salt mentioned below:

Ferric chloride

When a metallic oxide is dissolved in water, the solution formed has a high concentration of ____________ ions (H⁺, h₃O⁺, OH^-)

Choose the correct answer from the options given below:

A chloride which forms a precipitate that is soluble in excess of ammonium hydroxide is:

1) Calcium chloride

2) Ferrous chloride

3) Ferric chloride

4) Copper chloride

Identify the substance underlined, in the following case:

Cation that does not form a precipitate with ammonium hydroxide but forms one with sodium hydroxide.

State one relevant observation for given reactions:

Action of Sodium hydroxide solution on ferrous sulfate solution.

How will you distinguish between Ammonium hydroxide and Sodium hydroxide using copper sulphate solution?

Identify the salts P and Q from the observations given below:

On performing the flame test salt P produces a lilac coloured flame and its solution gives a white precipitate with silver nitrate solution, which is soluble in Ammonium hydroxide solution.

_____________ (AgCl / PbCl₂), a white precipitate is soluble in excess NH₄OH

Match the salts given in Column I with their method of preparation given in Column II.

State your observations when ammonium hydroxide solution is added drop by drop and then in excess to the following solution:

Copper sulphate solution

Identify the cations in the following case:

NaOH solution, when added to the Solution (A), gives a reddish brown precipitate

Choose the most appropriate answer from the following list of oxides which fit the description.

[SO₂, SiO₂, Al₂O₃, MgO, CO, Na₂O]

A basic oxide.