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Chemistry

Chemistry
The resources which can be used continuously, year-after -year are called

Biotic
Renewable
Abiotic
Non-renewable

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Chemistry
Match the sourc in Column B with the product of Column A. (Product) Column B (Source)A. Formic acid1. LemonB. Citric acid 2. TamarindC. Tartaric acid3. Ants

A B C3 2 1
A B C 2 1 3
A B C 3 1 2
A B C 2 3 1

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Chemistry
Which of the following chemicals is used in photography ?

Potassium nitrate
Silver bromide
Sodium chloride
Aluminium hydroxide

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Chemistry
Which amidst the following is not a gem stone ?

Opal
Pearl
Cat's-eye
Topaz

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Chemistry
Among the fuels given below, the one with highest calorific value is

Natural gas
Coal
Wood
Coke

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Chemistry
Sulphur dioxide level in the atmosphere can be reduced by using

Catalytic converters in industry
More efficient car engines
Static electricity to attract it in factory chimneys
Low - sulphur fuels

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