Tag: science & technology

Questions Related to science & technology

Brass gets discoloured in air because of the presence of which of the following gases in air?
general knowledge science & technology

  1. Oxygen

  2. Hydrogen sulphide

  3. Carbon dioxide

  4. Nitrogen

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Correct Option: B

Which of the following is a non metal that remains liquid at room temperature?
general knowledge science & technology

  1. Phosphorous

  2. Bromine

  3. Chlorine

  4. Helium

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Correct Option: B

Chlorophyll is a naturally occurring chelate compound in which central metal is
general knowledge science & technology

  1. copper

  2. iron

  3. magnesium

  4. calcium

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Correct Option: C

Which of the following metals forms an amalgam with other metals?
general knowledge science & technology

  1. Tin

  2. Mercury

  3. Lead

  4. Zinc

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Correct Option: B

Chemical formula for water is
general knowledge science & technology

  1. NaA1O2

  2. H2O

  3. Al2O3

  4. CaSiO3

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Correct Option: B

The gas usually filled in the electric bulb is

general knowledge science & technology

  1. nitrogen

  2. hydrogen

  3. carbon dioxide

  4. oxygen

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Correct Option: A

Washing soda is the common name for
general knowledge science & technology

  1. Sodium carbonate

  2. Calcium bicarbonate

  3. Sodium bicarbonate

  4. Calcium carbonate

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Correct Option: A

Quartz crystals normally used in quartz clocks etc. is chemically

general knowledge science & technology

  1. silicon dioxide

  2. germanium oxide

  3. a mixture of germanium oxide and silicon dioxide

  4. sodium silicate

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Correct Option: A

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

general knowledge science & technology

  1. Methane

  2. Nitrous oxide

  3. Carbon dioxide

  4. Hydrogen

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Correct Option: D

Bromine is a

general knowledge science & technology

  1. black solid

  2. red liquid

  3. colourless gas

  4. highly inflammable gas

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Correct Option: B