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Chemistry

Chemistry
Which among the following is used to dilute oxygen in the gas cylinders used by divers ?

Krypton
Neon
Argon
Helium

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Chemistry
Sulphur dioxide bleaches colouring matter by :

Reduction
Dehydration
Oxidation
Decomposition

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Chemistry
Except mercury which is the other metal that is liquid at standard conditions for temperature and pressure

Magnesium
Bromine
Barium
Lead

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

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

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Chemistry
Candle is a mixture of

Bees wax and paraffin wax
Bees wax and stearic acid
Paraffin was and stearic acid
Higher fatty acids and stearic acid

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Chemistry
Which of the following is the strongest base in aqueous solution ?

Ammonia
Triethylamine
Diethylamine
Ethylamine

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