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General Science
1.The tree sends down roots from its branches to the soil is know as:

Answer:Option 1

Explanation:

Solution:

Banyan.

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2.Electric bulb filament is made of

Answer:Option 1

Explanation:

Solution:

Tungsten.

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3.Brass gets discoloured in air because of the presence of which of the following gases in air?

Answer:Option 1

Explanation:

Solution:

Hydrogen Sulphide

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4.Chlorophyll is a naturally occurring chelate compound in which central metal is

Answer:Option 1

Explanation:

Solution:
One such chelate is chlorophyll, the green pigment of plants. In chlorophyll the central ion is magnesium, and the large organic molecule is a porphyrin. The porphyrin contains four nitrogen atoms that form bonds to magnesium in a square planar arrangement.

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5.Which of the following is used in pencils?

Answer:Option 1

Explanation:

Solution:

Graphite

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6.Which of the following metals forms an amalgam with other metals?

Answer:Option 1

Explanation:

Solution:

Mercury

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7.Chemical formula for water is

Answer:Option 1

Explanation:

Solution:

H2O

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8.Washing soda is the common name for

Answer:Option 1

Explanation:

Solution:

Sodium Carbonate.

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9.Quartz crystals normally used in quartz clocks etc. is chemically

Answer:Option 1

Explanation:

Solution:

Silicon Dioxide.

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10.Which of the gas is not known as green house gas?

Answer:Option 1

Explanation:

Solution:

The list of Green House Gases are as follows:
1) Water vapor
2) Carbon dioxide
3) Methane
4) Nitrous oxide
5) Ozone
6) Chlorofluorocarbons.
Hydrogen is not a Green House Gas.

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