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Chemistry

Chemistry
Which of the following caused radioactive pollution along the coast of Kerala ?

Radium
Thorium
Plutonium
Zinc

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Chemistry
Nylon threads are made of

Polyvinyl polymer
Polysaccharide
Polyamide polymer
Polyester polymer

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Chemistry
Which of the following is not present in German-silver?

Copper
Silver
Nickel
Zinc

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Chemistry
The quality of petrol is expressed in terms of

Cetane number
Gold number
Octane number
Added unlead compounds

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Chemistry
A colloidal system in which a liquid is dispersed in a liquid is called

Gel
Sol
Precipitate
Emulsion

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Chemistry
Among the following iron ores, the highest percentage of iron content is found in–

Haemetite
Limnonite
None of these
Magnetite

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