Subject

Chemistry

Class

ICSE Class 10

Pre Boards

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Sample Papers

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 Multiple Choice QuestionsShort Answer Type

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21.

State one relevant observation for each of the following reactions:
The addition of ethyl alcohol to acetic acid in the presence of concentrated Sulphuric acid.


On addition of ethyl alcohol to acetic acid in the presence of conc.H2SO4 at high temperature, sweet smelling ethyl acetate ester is produced, and the process is known as esterification.

C2H5OH + CH3COOH → CH3COOC2H5 + H2O

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22.

State one relevant observation for each of the following reactions:
The action of dilute Hydrochloric acid on iron (II) sulphide.

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23.

State one relevant observation for each of the following reactions:
The action of Sodium hydroxide solution on ferrous sulphate solution.

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24.

State one relevant observation for each of the following reactions:
Burning of ammonia in air.

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25.

State one relevant observation for each of the following reactions:
Action of concentrated Sulphuric acid on hydrated copper sulphate

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26.

Draw the structural formula for each of the following:
2, 3 – dimethyl butane

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27.

Draw the structural formula for each of the following:
Diethyl ether

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28.

Draw the structural formula for each of the following:
Propanoic acid

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29.

Select the process from the following which matches the given description.
(calcination, roasting, pulverisation, smelting)

Crushing of the ore into a fine powder.

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30.

Select the process from the following which matches the given description.
(calcination, roasting, pulverisation, smelting)

Heating of the ore in the absence of air to a high temperature.

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