Question : Identify a hydrocarbon pair that is not part of the homologous series.

Option 1: CH₄ and C₂H₆

Option 2: C₂H₆ and C₃H₉

Option 3: C₂H₆ and C₃H₈

Option 4: C₄H₈ and C₅H₁₀

Question : Heavy water is made by ______.

Option 1: dissolving salt of heavy metals in distilled water

Option 2: repeated distillation and condensation of water

Option 3: burning Deuterium in oxygen

Option 4: by burning the heavier isotope of Oxygen and Hydrogen

Question : Directions: There are five houses A, B, C, D, and O in a row. A is on the right of B and left of C. O is on the right of A. B is on the right of D. Which house is in the middle?

Option 1: O

Option 2: A

Option 3: B

Option 4: D

Question : Which vitamin deficiency causes the disease, Pernicious anaemia?

Option 1: Vitamin B₅

Option 2: Vitamin B₁₂

Option 3: Vitamin B₆

Option 4: Vitamin C

Question : What was the theme of World Water Day 2020?

Option 1: Clean Water Reservoirs

Option 2: Water and Climate Change

Option 3: Clean Drinking Water

Option 4: Change Drainage Systems