Give one chemical test to distinguish between the following pair

Subject

Chemistry

Class

ICSE Class 12

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 Multiple Choice QuestionsShort Answer Type

31.

Give balanced chemical equations for the following reactions:
(i) Fluorine is passed through cold, dilute NaOH solution.
(ii) Hydrogen peroxide is treated with acidified KMnO4 solution.
(iii) Sulphuric acid is treated with hydrogen sulphide.

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32.

Draw the structure of xenon tetrafluoride molecule and state the hybridization of the central atom and the geometry of the molecule.

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33.

Name the important ore of silver. Write all the steps and reactions involved in the Cyanide process for the extraction of silver from its ore.

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34.

Explain the following: 
(i) Why do transition metal ions possess a great tendency to form complexes?
(ii) The paramagnetic character in 3d-transition series elements increases up to Mn and
then decreases.

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35.

How can the following conversions be brought about:
(i) Glycerol to formic acid
(ii) Chlorobenzene to phenol 
(iii) Diethyl ether to ethanol 
(iv) Phenol to aniline.

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36.

(i) How is iodoform prepared from ethanol? Give balanced equation. 
(ii) What will be the product formed when chlorobenzene is heated with sodium metal in the presence of dry ether?

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37.

Identify the compounds A, B, C , D, E and F:

CH subscript 3 COCH subscript 3 space rightwards arrow with Conc. space HNO subscript 3 on top space straight A space rightwards arrow with SOCl subscript 2 on top space straight B space rightwards arrow with NH subscript 3 on top space straight C space rightwards arrow with LiAlH subscript 4 on top space straight D
space rightwards arrow with HNO subscript 2 space on top space straight E space rightwards arrow with CH subscript 3 COCl on top space straight F

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38.

Give balanced equations for the following name reactions: 
(i) Reimer-Tiemann reaction.
(ii) Rosenmund reaction
(iii) Hoffmann’s degradation reaction

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39.

Give one chemical test to distinguish between the following pairs of compounds: 
(i) Ethylamine and diethylamine.
(ii) Acetaldehyde and benzaldehyde


Chemical test to distinguish between the following pairs:
(i) Ethyl amine and diethylamine

Hinsberg’s test
Ethylamine – when shaken with benzene sulphonyl chloride and aqueous KOH solution, ethyl amine gives a clear solution.


Diethylamine – on similar treatment forms an insoluble substance.



ii) Acetaldehyde to Benzaldehyde

Acetaldehyde gives iodoform test with Iodine and alkali, benzaldehyde does not give iodoform test.

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40.

Arrange the following compounds in the ascending order of their basic strength and give reasons for your answer:
Methylamine, Aniline, Ethylamine, Diethyl ether

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