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

‘Net metering’ is sometimes seen in the news in the context of promoting the_____.

Which one of the following is the best description of ‘INS Astradharini’ in the news recently?

Concerning ‘fuel cells’ in which hydrogen-rich fuel and oxygen are used to generate electricity, consider the following statements:
$1$. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products.
$2$. Fuel cells can power buildings and not for small devices like laptops or computers.
$3$. Fuel cells produce electricity in the form of Alternating Current (AC).
Which of the statements given above is/are correct?

In which of the following activities are Indian Remote Sensing (IRS) satellites used?

1. Assessment of crop productivity

2. Locating groundwater resources

3. Mineral exploration

4. Telecommunications

5. Traffic studies

Select the correct answer using the code given below:

With reference to ‘Near Field Communication (NFC) Technology’, which of the following statements is/are correct?

1. It is a contactless communication technology that uses electromagnetic radio fields.

2. NFC is designed 'for use by devices which can be at a distance of even a metre from each other.

3. NFC can use encryption when sending sensitive information.

Select the correct answer using the codes given below:

What can be the impact of excessive/inappropriate use of nitrogenous fertilizers in agriculture?

1. The proliferation of nitrogen-fixing microorganisms in soil can occur.

2. Increase in the acidity of soil can take place.

3. Leaching of nitrate to the groundwater can occur.

Select the correct answer using the codes given below: