MCQs on Olympics

1) Consider the following phenomena: 

1. Size of the sun at dusk
2. Colour of the sun at dawn
3. Moon being visible at dawn
4. Twinkle of stars in the sky
5. Polestar being visible in the sky

Which of the above are optical illusions?

1. 1, 2 and 3
2. 3, 4 and 5
3. 1, 2 and 4
4. 2, 3 and 5

   Click Here for Answer   Answer - (c) 

2) Rainbow is produced when sunlight falls on drops of rain.
Which of the following physical phenomena are responsible for this?

1. Dispersion
2. Refraction
3. Internal reflection

Select the correct answer using the codes given below.

1. 1 and 2 only
2. 2 and 3 only
3. 1 and 3 only
4. 1, 2 and 3

Click Here for Answer   Answer - (d)   

3) The known forces of nature can be divided into four classes, viz, gravity, electromagnetism, weak nuclear force and strong nuclear force. with reference to them, which one of the following statements is not correct?

1. Gravity is the strongest of the four
2. Electromagnetism act only on particles with an electric charge
3. Weak nuclear force causes radioactivity
4. Strong nuclear force holds protons and nutrons inside the nuclear of an atom.

 Click Here for Answer   Answer - (a)   

4) The efforts to detect the existence of Higgs boson particle have become frequent news in the recent past. What is /are the importance/importance of discovering this particle?

1. It will enable us to understand as to why elementary particles have mass.
2. It will enables us in the near future to develop the technology to transferring matter from one point to another without traversing the physical space between them.
3. It will enable us to create better fuels for nuclear fission.

Select the correct answer using the codes given below:

1. 1 only
2. 2 and 3 only
3. 1 and 3 only
4. 1, 2 and 3

   Click Here for Answer   Answer - (a)   

5) Consider the following animals:

1. Sea cow
2. Sea horse
3. Sea lion

Which of the above is/are mammal/mammals?

1. 1 only
2. 1 and 3 only
3. 2 and 3 only
4. 1, 2 and 3

Click Here for Answer   Answer -(b) 1 and 3 only   

6) Which of the following diseases can be transmitted from one person to another through tattooing? 

1. Chikungunya
2. Hepatitis B
3. HIV-AIDS

Select the correct answer using the codes given below

a. 1 only
b. 2 and 3 only
c. 1 and 3 only
d. 1, 2 and 3

   Click Here for Answer   Answer -(b)2 and 3 only     

7) Consider the following minerals

1. Calcium
2. Iron
3. Sodium

Which of the minerals given above is/are required by human body for the contraction of muscles?

1. 1 only
2. 2 and 3 only
3. 1 and 3 only
4. 1, 2 and 3

   Click Here for Answer   Answer - (a)only 1    

8) Which of the following statements is / are correct?

1. Viruses lack enzymes necessary for the generation of energy.
2. Viruses can be cultured in any synthetic medium.
3. Viruses are transmitted from one organism to another by biological vectors only.

Select the correct answer using the codes given below.

1. 1 only
2. 2 and 3 only
3. 1 and 3 only
4. 1, 2 and 3

   Click Here for Answer   Answer - (a)only 1    

9) Improper handling and storage of cereal grains and oilseeds result in the production of toxins known as aflatoxins which are not generally destroyed by normal cooking process. Aflatoxins are produced by

1. bacteria
2. protozoa
3. moulds
4. viruses

   Click Here for Answer   Answer - (c)    

10) Fruits stored in a cold chamber exhibit longer storage life because

1. exposure to sunlight is prevented
2. concentration dioxide in the is increased of carbon environment
3. rate of respiration is decreased
4. there is an increase in humidity

   Click Here for Answer   Answer - (c)    

11) Many transplanted seedlings do not grow because

1. the new soil does not contain favorable minerals
2. most of the root hairs grip the new soil too hard
3. most of the root hairs are lost during transplantation
4. leaves get damaged during transplantation

   Click Here for Answer   Answer - (c)    

12) Which of the following leaf modifications occurs/occur in desert areas to inhibit water loss?

1. Hard and waxy leaves
2. Tiny leaves or no leaves
3. Thorns instead of leaves

Select the correct answer using the codes given below.

1. 1 and 2 only
2. 2 only
3. 1 and 3 only
4. 1, 2 and 3

   Click Here for Answer   Answer - (d)    

13) Ball bearings are used in bicycles, cars, etc., because

1. The actual area of contact between the wheel and axle is increased
2. The effective area of contact between the wheel and axle is increased
3. The effective area of contact between the wheel and axle is reduced
4. None of the statements is correct

   Click Here for Answer   Answer - (d)