General Science MCQ’S

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

Answer: Option C
Solution: Banyan.

#2. Electric bulb filament is made of

Answer: Option D
Solution: Tungsten.

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

Answer: Option B
Solution: Hydrogen Sulphide

#4. Which of the following is a non metal that remains liquid at room temperature?

Answer: Option B
Solution: Bromine is a chemical element with symbol Br and atomic number 35. It is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. Its properties are thus intermediate between those of chlorine and iodine.

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

Answer: Option B
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.

#6. Which of the following is used in pencils?

Answer: Option A
Solution: Graphite

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

Answer: Option B
Solution: Mercury

#8. Chemical formula for water is

Answer: Option B
Solution: H2O

#9. The gas usually filled in the electric bulb is

Answer: Option A
Solution: Nitrogen.

#10. Washing soda is the common name for

Answer: Option A
Solution: Sodium Carbonate.
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