Tag: science & technology

Questions Related to science & technology

When an iron nail gets rusted, iron oxide is formed
general knowledge science & technology

  1. without any change in the weight of the nail

  2. with decrease in the weight of the nail

  3. with increase in the weight of the nail

  4. without any change in colour or weight of the nail

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Correct Option: C

Galvanised iron sheets have a coating of
general knowledge science & technology

  1. lead

  2. chromium

  3. zinc

  4. tin

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Correct Option: C

Among the various allotropes of carbon,
general knowledge science & technology

  1. coke is the hardest, graphite is the softest

  2. diamond is the hardest, coke is the softest

  3. diamond is the hardest, graphite is the softest

  4. diamond is the hardest, lamp black is the softest

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Correct Option: C

The group of metals Fe, Co, Ni may best called as
general knowledge science & technology

  1. transition metals

  2. main group metals

  3. alkali metals

  4. rare metals

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Correct Option: A

Heavy water is

general knowledge science & technology

  1. deuterium oxide

  2. PH7

  3. rain water

  4. tritium oxide

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Correct Option: A

The chemical (ethyl merceptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of

general knowledge science & technology

  1. bromine

  2. fluorine

  3. chlorine

  4. sulphur

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Correct Option: D

The element common to all acids is
general knowledge science & technology

  1. hydrogen

  2. carbon

  3. sulphur

  4. oxygen

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Correct Option: A

Non stick cooking utensils are coated with
general knowledge science & technology

  1. Teflon

  2. PVC

  3. black paint

  4. polystyrene

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Correct Option: A

Monazite is an ore of

general knowledge science & technology

  1. titanium

  2. zirconium

  3. iron

  4. thorium

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Correct Option: D

Carbon, diamond and graphite are together called
general knowledge science & technology

  1. allotropes

  2. isomers

  3. isomorphs

  4. isotopes

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Correct Option: A