Question : Yellow spots on citrus leaves is due to deficiency of:

Option 1: Zinc

Option 2: Magnesium

Option 3: Boron

Option 4: Iron

Question : Commercially valued cork is obtained from:

Option 1: Quercus suber

Option 2: Cedrus deodara

Option 3: Ficus

Option 4: Cycas

Question : Directions: What is the best way to order the progression in hardware?
1. Silicon chips
2. Transistors
3. Vacuum tube
4. Integrated circuits

Option 1: 4, 2, 3, 1

Option 2: 3, 4, 1, 2

Option 3: 3, 2, 4, 1

Option 4: 4, 1, 3, 2

Question : Which of the following colloids is an example of foam?

Option 1: Sponge

Option 2: Butter

Option 3: Cheese

Option 4: Mist

Question : The ratio of the volume of the two cones is 2 : 3, and the ratio of the radii of their bases is 1 : 2. The ratio of their heights is:

Option 1: 3 : 8

Option 2: 8 : 3

Option 3: 4 : 3

Option 4: 3 : 4