EASY
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Combination reactions are also called synthesis reactions.

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Important Questions on Chemical Reactions

EASY

Choose the method of preparation of Iron (III) chloride, from the methods given in the list:

[List: A. Neutralization B.Precipitation C.Direct combination D.Substitution]

MEDIUM
Write a balanced equation for the preparation of the following salt: Zinc carbonate from Zinc sulphate.
 
HARD
Give a chemical test to distinguish between the following pair of chemicals: Sodium chloride solution and Sodium nitrate solution.
MEDIUM

Complete the following table which refers to the conversion of ions to neutral particles.

Conversion Ionic equation Oxidation/Reduction

Chloride ion to chlorine molecule

   

Lead II ion to lead

   

 

MEDIUM

State one relevant observation for of the following:

Barium chloride solution is slowly added to sodium sulphate solution.

MEDIUM

Name the gas that is produced in the following case:

Action of dilute hydrochloric acid on sodium sulphide.

HARD

Give a chemical test to distinguish between the following pair of chemicals: Lead nitrate solution and Zinc nitrate solution.

HARD

Distinguish between the following pair of compounds using a reagent as a chemical test:

  • Calcium nitrate and zinc nitrate solution.
HARD

Write a balanced chemical equation for the following:

  • Reaction of lead nitrate solution with ammonium hydroxide.
EASY
What colour changes occur when copper (II) carbonate is heated?
MEDIUM
Write a balanced equation for the preparation of each of the following salts.
Zinc carbonate from zinc sulphate.
MEDIUM
What colour changes occur when a solution of ammonia in water is added to a solution of iron (II) sulphate and the mixture is allowed to stand in open?
MEDIUM
Both zinc sulphate and lead nitrate are colourless solid substances. Write the chemical reactions used to identify them.
MEDIUM
How a soluble salt can be formed when a metal is displaced by dilute acid? Give a suitable reaction to support your answer.
MEDIUM
What colour changes occur when lead (II) nitrate is heated?
MEDIUM

Write the balanced chemical equations for the following:

Action of heat on sodium nitrate.

MEDIUM
Name a substance that gives off brown fumes and leaves a white oxide when heated.
HARD
Astha added quick lime to water and observed that heat is produced. The kind of this reaction is:
MEDIUM

Write the balanced chemical equations for the following:

Action of heat on silver nitrate.

MEDIUM
Give a chemical test to distinguish between the calcium nitrate and zinc nitrate solutions.