INSIGHT UPSC QUIZ

The presence of certain minerals is essential in water, however, if found in excess they can be harmful to our body. In this context, which of the following statements are correct?

1. Deficiency of fluoride in drinking water causes diseases such as tooth decay.

2. Excessive sulphate in drinking water causes laxative effect.

3. Excess lead in drinking water can cause disease such as ‘blue baby’ syndrome.

Select the correct answer using the code given below.

Consider the following statements:

1. The direction of current is taken opposite to the direction of flow of electrons.

2. Resistance is a property of a conductor that generates heat in the electrical circuit.

3. The SI unit of electric current is Amperes. 

Select the correct answer using the code given below:

The immune system is a complex network of cells known as immune cells that contains lymphocytes. In this context, consider the following statements: 

1. Lymphocytes are red blood cells and one of the body's main types of immune cells. 

2. Lymphocytes are made in the bone marrow and found in the blood and lymph tissue. 

Which of the statements given above is/are correct?

The nearest and the farthest points up to which a normal human eye can see objects clearly are between: 

The ‘scattering of light’ is responsible for which of the following phenomena in nature?

1. Tyndall effect.

2. Colour of water in deep sea.

3. Blue colour of the sky.

4. Rainbow formation.

Select the correct answer using the code given below.

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?

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:

Read the following statements carefully and select the correct answer from codes given below:

1. The phenomenon of splitting of white light into its seven component colours by a prism is called dispersion.

2. While passing through a prism, the violet light bends the least while the red the most.

3. Isaac Newton was the first to use a glass prism to obtain the spectrum of sunlight.

Which of the statements given above is/are correct?

Consider the following statements: 

1. A person with myopia can see nearby objects clearly but cannot see distant objects distinctly.

2. In a myopic eye, the image of a distant object is formed behind the retina and not at the retina itself.

3. The defect of myopia can be corrected by using a concave lens of suitable power.

Which of the statements given above is/are correct?

 Consider the following statements:

1. Anti-viral medicines are harder to make as viruses have biochemical mechanisms of their own. 

2. Anti-bacterial medicines target both bacteria and fungi.

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