Sample questions
You've seen the pattern — here are a few of the actual PYQs.
NDA2022
Which one of the following salts does not possess water of crystallization?
- A Potassium permanganate ✓
- B Blue vitriol
- C Washing soda
- D Mohr's salt
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
NDA2021
What is the number of water molecules present in a Ferrous Sulphate crystal ?
- A 1
- B 3
- C 5
- D 7 ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
NDA2020
Number of molecules of water of crystallization in copper sulphate, sodium carbonate and Gypsum are
- A 5, 10 and 2 respectively
- B 10, 2 and 5 respectively
- C 5, 2 and 10 respectively ✓
- D 2, 5 and 10 respectively
✓ Correct answer: (C)
Science & Technology › Physics & Chemistry
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