I have created this practice set of 50 mcqs for air force.
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Carbon : Diamond โ Diamond is a crystalline form (allotrope) of carbon.
Corundum : Ruby โ Ruby is a red gemstone variety of corundum.
โ Answer: (B) Silicon
Reason:
Therefore, Silicon is different from the other three.
โ Correct Option: (B) Silicon
Quick Exam Trick
So, Si is the odd one out.
โ Answer: (D) Chalk
Explanation:
Hence, Chalk is different from the other three.
โ Correct Option: (D) Chalk
Exam Trick:
Tea โ Cinchona โ Rubber โ Plants/Crops
Chalk โ Mineral
So, Chalk is the odd one out.