General Science

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

1. Oak
2. Pine
3. Banyan
4. Palm

Answer:Option 1

Explanation:

Solution:

Banyan.

2.Electric bulb filament is made of

1. Copper
2. Aluminum
3. Lead
4. Tungsten

Answer:Option 1

Explanation:

Solution:

Tungsten.

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

1. Oxygen
2. Hydrogen Sulphide
3. Carbon dioxide
4. Nitrogen

Answer:Option 1

Explanation:

Solution:

Hydrogen Sulphide

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

1. Copper
2. Magnesium
3. Iron
4. Calcium

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.

5.Which of the following is used in pencils?

1. Graphite
2. Silicon
3. Charcoal
4. Phosphorous

Answer:Option 1

Explanation:

Solution:

Graphite

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

1. Tin
2. Mercury
3. Lead
4. Zinc

Answer:Option 1

Explanation:

Solution:

Mercury

7.Chemical formula for water is

1. NaA1O₂
2. H₂O
3. Al₂O₃
4. CaSiO₃

Answer:Option 1

Explanation:

Solution:

H₂O

8.Washing soda is the common name for

1. Sodium Carbonate
2. Calcium Bicarbonate
3. Sodium Bicarbonate
4. Calcium Carbonate

Answer:Option 1

Explanation:

Solution:

Sodium Carbonate.

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

1. Silicon Dioxide
2. Germanium Oxide
3. A mixture of Germanium Oxide and Silicon dioxide
4. Sodium Silicate

Answer:Option 1

Explanation:

Solution:

Silicon Dioxide.

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

1. Methane
2. Nitrous oxide
3. Carbon dioxide
4. Hydrogen

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.