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प्रश्न
State two observations when
A few crystals of KNO3 are heated in a hard glass tube
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उत्तर
Oxygen is evolved.
2KNO3→ 2KNO2 + O2
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संबंधित प्रश्न
Write balanced chemical equations for the action of dilute sulphuric acid on sodium sulphite.
Give two balanced reactions of the type to show the following property of sulphuric acid:
Non-volatile nature
Name the following :
The precipitate obtained by treating aqueous lead nitrate with dilute sulphuric acid.
Give examples of the use of sulphuric acid as
An oxidizing agent
Write the equation for the laboratory preparation of the following salts, using sulphuric acid.
Iron (II) sulphate from iron.
- Name the catalyst which helps in the conversion of sulphur dioxide to sulphur trioxide in step C.
- In the contact process for the manufacture of sulphuric acid, sulphur trioxide is not converted to sulphuric acid by reacting it with water. Instead a two-step procedure is used. Write the equations for the two steps involved in D.
- What type of substance will liberate sulphur dioxide from sodium sulphite in step E?
- Write the equation for the reaction by which sulphur dioxide is converted to sodium sulphite in step F.
A, B, C and D summarize the properties of sulphuric acid depending on whether it is dilute or concentrated. Choose the property (A, B, C or D), depending on which is relevant to each of the preparations (i) to (ii).
A. Dilute acid (typical acid properties)
B. Non-volatile acid
C. Oxidizing agent
D. Dehydrating agent
(i) Preparation of hydrogen chloride.
(ii) Preparation of ethane from ethanol
(iii) Preparation of copper sulphate from copper oxide.
Name the gas evolved in following case:
The gas produced by the action of concentrated sulphuric acid on sodium chloride.
State your observation for the following case :
Moist blue litmus is introduced into a gas jar of sulphur dioxide.
Give a chemical test to distinguish between dilute sulphuric acid and dilute hydrochloric acid (using lead nitrate solution).
