Tag: science & technology

Questions Related to science & technology

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

  1. Phosphorous

  2. Bromine

  3. Chlorine

  4. Helium


Correct Option: B

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

  1. copper

  2. magnesium

  3. iron

  4. calcium


Correct Option: B

Which of the following is used in pencils?

  1. Graphite

  2. Silicon

  3. Charcoal

  4. Phosphorous


Correct Option: A

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

  1. Tin

  2. Mercury

  3. Lead

  4. Zinc


Correct Option: B

Washing soda is the common name for

  1. Sodium carbonate

  2. Calcium bicarbonate

  3. Sodium bicarbonate

  4. Calcium carbonate


Correct Option: A

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


Correct Option: A
  1. Methane

  2. Nitrous oxide

  3. Carbon dioxide

  4. Hydrogen


Correct Option: D