1. Which of the following is different with respect to physical appearance?
A. Arsenic
B. Phosphorus
C. Antimony
D. Bismuth
✅ The correct answer is option B.
Group 5A and 6A Elements MCQs
2. Which one of the followings possesses melting point below 0?C?
A. Nitrogen
B. Phosphorus
C. Carbon
D. Bismuth
✅ The correct answer is option A.
3. Compounds of nitrogen and phosphorus are mostly
A. Ionic
B. Covalent
C. Polar
D. All varieties are possible
✅ The correct answer is option B.
4. The most electronegative element among the following is
A. Sb
B. N
C. As
D. P
✅ The correct answer is option B.
5. SO3 is not absorbed in water directly because
A. The reaction is exothermic
B. It is insoluble in water
C. Dilute acid is produced
D. All of above
✅ The correct answer is option A.
6. Phosphene gas will be produced if phosphorous acid is subjected to
A. Oxidation
B. Reduction
C. Decomposition
D. Both B & C
✅ The correct answer is option D.
7. Which of the following will give phosphoric acid one reaction with water
A. PCI5
B. P2O3
C. P2O5
D. All of the above
✅ The correct answer is option D.
8. Which one of following is not a property of pure quartz?
A. Coloured solid
B. Brittle
C. Hard
D. All of above
✅ The correct answer is option A.
9. Phosphorus is a Greek word and it means
A. Light bearing
B. Fire
C. Impure
D. Tetrahedral
✅ The correct answer is option A.
10. Which of the following does not contain phosphorus?
A. Yolk of egg
B. Bone
C. Nerves
D. Steel
✅ The correct answer is option D.