Question : Which of the following is a semiconductor?

Option 1: Silver

Option 2: Copper

Option 3: Glass

Option 4: Silicon

Question : Which of the following is an agro-based industry?

Option 1: Aluminium

Option 2: Coal

Option 3: Iron and Steel

Option 4: Sugar

Question : Haemoglobin in the blood is a complex protein rich in:

Option 1: Iron

Option 2: Silver

Option 3: Copper

Option 4: Gold

Question : Directions: Which one of the given responses is the meaningful order of the following?
1. Brahmaputra
2. Atlantic
3. Chilka
4. Bay of Bengal

Option 1: 2, 4, 1, 3

Option 2: 2, 4, 3, 1

Option 3: 3, 1, 4, 2

Option 4: 3, 4, 2, 1

Question : Which of the following elements is used in the manufacture of fertilisers?

Option 1: Fluorine

Option 2: Potassium

Option 3: Lead

Option 4: Aluminium