Question types

Changes Around Us. question types

89 questions across 8 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

89
Questions
8
Question groups
5
Question types
Sample Questions

Changes Around Us. questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M C Q1 Mark
Fatty foods become rancid due to the process of $–$
  • Oxidation
  • B
    Corrosion
  • C
    reduction
  • D
    hydrogenation

Answer: A.

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Q 2M C Q1 Mark
Both CO2 and H2 gases are –
  • A
    Heavier than air
  • Colourless
  • C
    Acidic in nature
  • D
    soluble in water

Answer: B.

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Q 3M C Q1 Mark
Chemically rust is $–$
  • A
    Hydrated ferrous
  • B
    Only ferric oxide
  • Hydrated ferric oxide
  • D
    None of these

Answer: C.

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Q 4M C Q1 Mark
On immersing an iron nail in CuSO4 solution for few minutes, you will observe –
  • A
    No reaction takes place
  • B
    The colours of solution fades away
  • C
    The surface of iron nails acquire a black coating
  • The colour of solution changes to green

Answer: D.

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Q 5M C Q1 Mark
The reaction of H2 gas with oxygen gas to form water is an example of –
  • Combination
  • B
    Redox reaction
  • C
    Exothermic reaction
  • D
    All of these

Answer: A.

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Pick question groups from the list above, set marks and difficulty, and export a branded PDF with step-by-step answer keys. First 3 chapters free — no signup.

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