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

How is ethyne prepared in the laboratory?

Give reason for the following:
In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitatre should not be heated very strongly, above 200°C

How are addition reactions of ethene different from ethyne?

Complete and balance the following equation:
Cu + HNO₃ → NO₂ + ________+ _________

Write the equations to show what happens when ethyne gas reacts with
Bromine water

How will you convert
Ethyne to ethane

Give reason for the following:
Commercial concentrated nitric acid is yellow in colour, but when it is dilute with water, it turns colourless.
Give one chemical test for nitric acid.

Give two chemical tests to distinguish between ethane and ethyne .

State the conditions for the oxidation of ammonia to nitrogen monoxide [nitric oxide], in the manufacture of nitric acid by Ostwald's process. Write the balanced equcation for the reaction.

Write a balanced equation for the production of nitrogen dioxide using copper.

Name the product, catalyst and approximate temperature maintained in Ostwald's process. How is the temperature maintained in the Ostwald's process?

Write the balanced equation for the equation preparation of nitric acid from potassium nitrate.

During a thunderstorm, the rainwater contains nitric acid. The nitric acid is formed as a result of three chemical reactions. Describe or write balanced chemical equation for these three reactions.

Write three uses of ethyne.

Explain the following:
 Ethene and ethyne burn with sooty luminous flame

Give the name of a soluble lead salt and write the equation for the action of heat on this salt.

Give the reactions of ethyne with Hydrogen

Write balanced equation for the reaction between nitrogen and oxygen, when lightning strikes.

Describe what you see when concentrated nitric acid is added to copper.

What do you see when concentrated nitric acid is added to copper?