Q103. In the context of proposals to the use of hydrogen-enriched CNG (H-CNG) as fuel for buses in public transport, consider the following statements: 1. The main advantage of the use of H-CNG is the elimination of carbon monoxide emissions. 2. H-CNG as fuel reduces carbon dioxide and hydrocarbon emissions. 3. Hydrogen up to one-fifth by volume can be blended with CNG as fuel for buses. 4. H-CNG makes the fuel less expensive than CNG. Which of the statements given above is/are correct?

With reference to green hydrogen, consider the following statements: 1. It can be used directly as a fuel for internal combustion. 2. It can be blended with nat

Biomass gasification is considered to be one of the sustainable solutions to the power crisis in India. In this context, which of the following statements is/ar

With reference to ‘fuel cells’ in which hydrogen-rich fuel and oxygen are used to generate electricity, consider the following statements: 1. If pure hydrogen i

In the Union Budget 2011-12, a full exemption from the basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this mat

Consider the following: 1. Carbon monoxide 2. Methane 3. Ozone 4. Sulphur dioxide Which of the above are released into the atmosphere due to the burning of crop

In the context of solving pollution problems, what is/are the advantage/advantages of bioremediation techniques? 1. It is a technique for cleaning up pollution

Microbial fuel cells are considered a source of sustainable energy. Why? 1. They use living organisms as catalysts to generate electricity from certain substrat

Consider the following statements: 1. Agricultural soils release nitrogen oxides into the environment. 2. Cattle release ammonia into the environment. 3. Poultr

Consider the following statements: 1. The Oil Pool Account of Government of India was dismantled with effect from 1-4-2002 2. Subsidies on PDS kerosene and dome

Consider the following statements: At the present level of technology available in India, solar energy can be conveniently used to: 1. Supply hot water to resid

When reference to carbon nanotubes, consider the following statements: 1. They can be used as carriers of drugs and antigens in the human body. 2. They can be m

Consider the following features of newer models of motor cars: 1. Radial tyres 2. Streamlined body 3. Multipoint fuel injection 4. Catalytic converter with exha

With reference to furnace oil, consider the following statements: 1. It is a product of oil refineries. 2. Some industries use it to generate power. 3. Its use

In which of the following are hydrogels used? 1. Controlled drug delivery in patients 2. Mobile air-conditioning systems 3. Preparation of industrial lubricants

Graphene has been frequently in the news recently. What is its importance? 1. It is a two-dimensional material and has good electrical conductivity. 2. It is on

Consider the following statements: 1. Coal ash contains arsenic, lead and mercury. 2. Coal-fired power plants release sulphur dioxide and oxides of nitrogen int

What are the significances of a practical approach to sugarcane production known as ‘Sustainable Sugarcane Initiative’? 1. Seed cost is very low in this compare

Lead, ingested or inhaled, is a health hazard. After the addition of lead to petrol has been banned, what still are the sources of lead poisoning? 1. Smelting u

What is/are the advantage/ advantages of zero tillage in agriculture? 1. Sowing of wheat is possible without burning the residue of the previous crop. 2. Withou

With reference to ‘fly ash’ produced by the power plants using coal as fuel, which of the following statements is/are correct? 1. Fly ash can be used in the pro

Why is there a concern about copper smelting plants? 1. They may release lethal quantities of carbon monoxide into the environment. 2. The copper slag can cause

With reference to chemical fertilisers in India, consider the following statements: 1. At present, the retail price of chemical fertilisers is market-driven and

Consider the following statements: Statement-I: Carbon markets are likely to be one of the most widespread tools in the fight against climate change.

Consider the following statements: 1. "The Climate Group" is an international non-profit organization that drives climate action by building large net

"Climate Action Tracker" which monitors the emission reduction pledges of different countries is a: (a) Database created by coalition of research orga

With reference to the ‘New York Declaration on Forests’, which of the following statements are correct? 1. It was first endorsed at the United Nations

In the context of which of the following do some scientists suggest the use of cirrus cloud thinning technique and the injection of sulphate aerosol i

In the context of mitigating the impending global warming due to anthropogenic emissions of carbon dioxide, which of the following can be potential si

Which of the following best describe/ describes the aim of the ‘Green India Mission’ of the Government of India? 1. Incorporating environmental benefi

The term ‘Intended Nationally Determined Contributions’ is sometimes seen in the news in the context of (a) pledges made by the European countries to