INSIGHT UPSC QUIZ

 Some countries now use alcohol as an additive in petrol. In context of this, consider the following statements: 

1. Addition of alcohol increases the burning efficiency of petrol and reduces knocking.

2. Petrol added with small quantities of alcohol becomes more stable and doesn’t become too hot in warm areas or too cold in freezing temperatures.

3. Alcohol is a cleaner fuel which gives rise to only carbon dioxide and water on burning in sufficient oxygen.

Which of the statements given above is the correct reason for using alcohol as an additive in petrol?

 With reference to ‘Magnetic Field’, consider the following statements:

1. The magnetic field produced by a current-carrying wire at a given point depends directly on the current passing through it.

2. The magnetic field inside a long straight solenoid-carrying current is zero.

Which of the statement(s) given above is/are correct?

If we study a cell under a microscope, we will come across which among the following bodies inside it?

 Water vapour present in the atmosphere is formed due to which of the following factors?

1. Heating of water bodies.

2. Activities of living organisms.

3. Weathering of rocks.

4. Photosynthesis.

Select the correct answer using the code given below:

Consider the following statements: 

1. The ‘danger’ signal lights are red in colour as the red is least scattered by fog or smoke.

2. The sky appears dark to passengers flying at very high altitudes because of scattering of light. 

Which of the statements given above is/are correct?

Consider the following statements: 

1. The aperture of the pupil of a human eye can be changed with the help of the ciliary muscles. 

2. The curvature of human eye cannot be changed, because the lens of a human eye is fixed. 

Which of the statements given above is/are correct?

In the context of ‘immunity’ in human body, which of the following statements is/are correct? 

1. Skin on our body is an example of innate immunity.

2. Acquired immunity is characterised by memory. 

3. Injecting the microbes deliberately during immunisation induce passive immunity. 

Select the correct answer using the code given below.

Consider the following statements about pesticide residue in our food chain:

1. It is introduced in the food chain by aquatic plants and animals.

2. These chemicals get accumulated progressively at each trophic level. 

3. Human body accumulates minimum concentration of these chemicals.

Select the correct answer using the code given below:

Consider the following statements:

1. The e-Gopala App is a comprehensive breed improvement marketplace and information portal, directly used by farmers. 

2. Web version of e-GOPALA has been developed by the Union Ministry of Fisheries, Animal Husbandry and Dairying.

Which of the statement(s) given above is/are correct?

Consider the following statements about ‘Biochemical Oxygen Demand’ (BOD):

1. It is the amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water.

2. Highly polluted water have BOD value of less than 5 ppm. 

Which of the statements given above is/are correct?