Subject

Chemistry

Class

ICSE Class 10

Pre Boards

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Sample Papers

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 Multiple Choice QuestionsShort Answer Type

31.

The bleaching action of chlorine is permanent whereas the bleaching action of sulphur dioxideis temporary. In this context:-
Give a reason why chlorine is not used to bleach silk.

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32.

The bleaching action of chlorine is permanent whereas the bleaching action of sulphur dioxideis temporary. In this context:-
State the similarity in the use of Sulphur dioxide and chlorine as bleaching agents.


Both sulphur dioxide and chlorine bleach only in the presence of moisture.

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33.

The bleaching action of chlorine is permanent whereas the bleaching action of sulphur dioxideis temporary. In this context:-
Explain the bleaching action of sulphur dioxide with the help of chemical equations.

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34.

The bleaching action of chlorine is permanent whereas the bleaching action of sulphur dioxideis temporary. In this context:-
Why is bleaching by sulphur dioxide only temporary ? 

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35.

Draw the structural formula of a compound with two carbon atom each of the following cases:-
An alkane with a carbon to carbon single bond.

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36.

Draw the structural formula of a compound with two carbon atom each of the following cases:-
An alcohol contaning two carbon atom

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37.

Draw the structural formula of a compound with two carbon atoms in each of the following cases:-
An unsaturated hydrocarbon with a carbon to carbon triple bond.

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38.

Write the equations for the following laboratory proparations:-
Ethane From sodium propionate

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39.

Write the equations for the following laboratory proparations:-
Ethene from iodoethane

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40.

Write the equations for the following laboratory proparations:-
Ethyne from calcium carbide

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