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Chemistry

Chemistry
Colour imparted to the Bunsen flame by strontium salt is

Apple-green
Brick red
Crimson red
Bluish green

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Chemistry
The gas used for artificial fruit ripening of green fruit is

Ethylene
Methane
Acetylene
Ethane

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Chemistry
Most poisonous pollutant in water is

Phosphate
Zinc
Arsenic
Detergent

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Chemistry
Brass is a solution of molten copper in

Molten tin
Solid zinc
Gaseous zinc
Molten zinc

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Chemistry
The maximum number of covalent formed by nitrogen is

2
1
4
3

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Chemistry
Asbestos is formed of :

Calcium and Zinc
Calcium and Magnesium
Lead and Iron
Copper, Zinc and Manganese

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