Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CDS2022
While burning hydrocarbon fuels, if we see a yellow flame with lots of black smoke, it means that the fuel is :
- A made of saturated hydrocarbons.
- B made of unsaturated hydrocarbons. ✓
- C burning completely.
- D wet.
✓ Correct answer: (B)
Science & Technology › Physics & Chemistry
CDS2022
The number of saturated and unsaturated bonds in cyclohexane are :
- A 9 and 0 respectively.
- B 18 and 3 respectively.
- C 18 and 0 respectively. ✓
- D 9 and 3 respectively.
✓ Correct answer: (C)
Science & Technology › Physics & Chemistry
CDS2018
Which of the following is the general formula for saturated hydrocarbons?
- A CnH2n+2 ✓
- B CnH2n-2
- C CnH2n+1
- D CnH2n-1
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
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