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Chemistry

Chemistry
An alloy used in making heating elements for electric heating device is

Solder
Nichrome
Alloy Steel
German Silver

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Chemistry
Detergents are

None of these
Sodium salt of benzoic acid
Sodium salts of sulphonic acids
Sodium salts of fatty acids

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Chemistry
The term 'brown air' is used for

Photochemical smog
Sulphurous smog
Industrial smog
Acid fumes

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Chemistry
Saline soil contains

None of these
Lot of moisture
Hard rocks
High concentration of salt

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Chemistry
Which of the following electrodes is used in strongly alkaline solution

Mercury - mercurous chloride electrode
Silver - silver chloride electrode
Mercury - mercurous sulphate electrode
Mercury - mercuric oxide electrode

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Chemistry
The nucleus of a hydrogen atom consists of

1 proton + 2 neutron
1 electron only
1 neutron only
1 proton only

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