set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Milk is homogenized by

a) Removing its fat

b) Breaking down fat particles to the microscopic size with the help of centrifuge

c) Adding a little sodium carbonate

d) Boiling only

Question : 2

Why does the Government of India promote the use of ‘Neem-coated Urea’ in agriculture?

a) Nitrous oxide, which is a greenhouse gas, is not at all released into atmosphere by crop fields

b) Release of Neem oil in the soil increases nitrogen fixation by the soil micro-organisms

c) Neem coating slows down the rate of dissolution of urea in the soil

d) It is a combination of a weedicide and a fertilizer for particular crops

Question : 3

Which one of the following acids, is formed during the change of milk into curd?

a) Ascorbic acid

b) Citric acid

c) Acetic acid

d) Lactic acid

Question : 4

Which one of the following has the highest fuel value?

a) Natural gas

b) Hydrogen

c) Charcoal

d) Gasoline

Question : 5

Consider the following statements.

1. Coal, petroleum and natural gas are fossil fuels.
2. Gasohol is mixture of benzene and alcohol.
3. Geothermal energy is nonconventional energy source.
4. Gobar gas contains mainly methane.

a) Only 1, 2 and 3 are correct

b) Only 1 and 2 are correct

c) Only 2 and 3 are correct

d) 1, 3 and 4 are correct

Question : 6

Which of these is not a colloid?

a) Blood

b) Ice cream

c) Milk

d) Honey