51. Which of the following has maximum calorific value?

A. Hydrogen

B. Natural Gas

C. Gasoline

D. Charcoal

Click for Answer/Explanation

Correct Answer is A

52. Oxygen and Ozone are –

A. Allotropes

B. Isotopes

C. Isobars

D. Isomers

Click for Answer/Explanation

Correct Answer is A

53. Which of the following is not a mixture?

A. Toilet Soap

B. Baking Soda

C. Vinegar

D. Toothpaste

Click for Answer/Explanation

Correct Answer is B

Read More ? States of Matter Objective Questions

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