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Chemistry

Chemistry
Brass is a solution of molten copper in

Molten tin
Molten zinc
Solid zinc
Gaseous zinc

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Chemistry
In surgery, metal pins are used for joining together broken bones. These metal pins remain uncorroded in the body. What is the material of these pins?

Titanium
Iron
Copper
Aluminium

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Chemistry
The gas that is used in the manufacture of vanaspati ghee is :

Hydrogen
Nitrogen
Carbon dioxide
Oxygen

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Chemistry
Sea water is saltier than rain water because

Rivers wash away salts from earth and pour them into the sea
Sea beds have salt producing mines
The air around the sea is saltish
Sea animals are salt producing

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Chemistry
Maximum permissible concentration of total hardness in drinking water is

100
50
500
200

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Chemistry
The 'solid waste' is also known as

Toxic waste
Sedge
Sludge
Scrubber

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MORE MCQ ON Chemistry

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