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?

Read the following statements carefully: 

1. Motion of the moon around the earth.

2. Tides in open seas.

3. Rotation of earth.

4. Motion of planets around the Sun.

Which of the events given above are result of force of ‘Gravitation’?

According to Archimedes’ principle - When a body is immersed fully or partially in a fluid, it experiences an upward force that is equal to the weight of the fluid displaced by it. Which among the following are based on the application of this principle?

1. Ships

2. Lactometer

3. Thermometer

Select the correct answer using the code given below:

With reference to ‘blood’ present in the human body, consider the following statements:

1. It carries oxygen and food to all the cells in human body. 

2. It collects wastes from the cells for disposal. 

3. It is a type of connective tissue. 

Which of the statements given above is/are correct?

 In the context of nature of light, read the following statements carefully: 

1. Light does not travel in the same direction in all mediums. 

2. Light propagates with different speeds in different mediums. 

3. Light travels fastest in air with speed of 3×10⁸ m/s. 

4. Speed of light reduces considerably in glass or water.

Which of the statements given above is/are correct?

 Which among the following method(s) is/are used by pests to attack crops sown in the field?

1. They attack the root of the plant.

2. They bore into stem and fruits of the plant. 

3. They suck water from various parts of the plant.

Select the correct answer using the code given below:

When light enter the human eye, it passes through the different parts of the eye. In this context arrange the following in the correct sequence:

Consider the following statements about Carbon dioxide (CO₂):

1. Volcanic eruptions are a natural source of Carbon dioxide in the atmosphere.

2. Carbon dioxide is confined only to the tropospheric layer of the atmosphere. 

3. Excess of Carbon dioxide in the air is removed by green plants by respiration.

Which of the statements given above is/are correct?

In the Animal Kingdom, which of the following groups of organisms shows the highest level of cellular organisation?

1. Annelids 

2. Sponges

3. Coelenterates

Choose the correct answer by using the codes given below:

A lemon kept in water in a glass tumbler appears to be bigger than its actual size, when viewed from the sides. This is because of which of the following reasons: