Consider the following:

1. Battery storage
2. Biomass generators
3. Fuel cells
4. Rooftop solar photovoltaic units

How many of the above are considered "Distributed Energy Resources"?

[UPSC CSE 2024] #Science

Consider the following statements :

[UPSC CSE 2025] #Science

Statement I :
Studies indicate that carbon dioxide emissions from cement industry account for more than 5% of global carbon emissions.

Statement II :
Silica-bearing clay is mixed with limestone while manufacturing cement.

Statement III :
Limestone is converted into lime during clinker production for cement manufacturing.

Which one of the following is correct in respect of the above statements?

Consider the following types of vehicles:

[UPSC CSE 2025] #Science #Tech

I. Full battery electric vehicles
II. Hydrogen fuel cell vehicles
III. Fuel cell-electric hybrid vehicles

How many of the above are considered as alternative powertrain vehicles?

With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements:

[UPSC CSE 2025] #Science #Tech

I. All types of UAVs can do vertical landing.
II. All types of UAVs can do automated hovering.
III. All types of UAVs can use battery only as a source of power supply.

How many of the statements given above are correct?

In the context of electric vehicle batteries, consider the following elements:

[UPSC CSE 2025] #Science #Tech

I. Cobalt
II. Graphite
III. Lithium
IV. Nickel

How many of the above usually make up battery cathodes?

Consider the following substances:

[UPSC CSE 2025] #Science #Tech

I. Ethanol
II. Nitroglycerine
III. Urea

Coal gasification technology can be used in the production of how many of them?

Consider the following statements:

[UPSC CSE 2025] #Science #Tech

I. It is expected that Majorana 1 chip will enable quantum computing.

II. Majorana 1 chip has been introduced by Amazon Web Services (AWS).

III. Deep learning is a subset of machine learning.

Which of the statements given above are correct?

With reference to monoclonal antibodies, often mentioned in news, consider the following statements:

[UPSC CSE 2025] #Science #Tech

I. They are man-made proteins.

II. They stimulate immunological function due to their ability to bind to specific antigens.

III. They are used in treating viral infections like that of Nipah virus.

Which of the statements given above are correct?

Consider the following statements:

[UPSC CSE 2025] #Science #Tech

I. No virus can survive in ocean waters.
II. No virus can infect bacteria.
III. No virus can change the cellular transcriptional activity in host cells.

Which of the statements given above is/are correct?

Consider the following statements:

[UPSC CSE 2025] #Science #Tech

Statement I:
Activated carbon is a good and an attractive tool to remove pollutants from effluent streams and to remediate contaminants from various industries.

Statement II:
Activated carbon exhibits a large surface area and a strong potential for adsorbing heavy metals.

Statement III:
Activated carbon can be easily synthesized from environmental wastes with high carbon content.

Which one of the following is correct in respect of the above statements?

Consider the following space missions:

[UPSC CSE 2025] #C_A #Science

I. Axiom-4
II. SpaDex
III. Gaganyaan

How many of the space missions given above encourage and support micro-gravity research?

Consider the following statements:

[UKPCS 2025] #Science

Statement I: Light travels faster in air than in water.

Statement II: Refractive index of air is greater than that of water.