1
UPSC Civil Service Prelims Paper I 2025 (General Studies)
MCQ (Single Correct Answer)
+2
-0.66

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

I. Cobalt

II. Graphite

III. Lithium

IV. Nickel

How many of the above usually make up battery cathodes?

A

Only one

B

Only two

C

Only three

D

All the four

2
UPSC Civil Service Prelims Paper I 2025 (General Studies)
MCQ (Single Correct Answer)
+2
-0.66

Consider the following:

I. Cigarette butts

II. Eyeglass lenses

III. Car tyres

How many of them contain plastic?

A

Only one

B

Only two

C

All the three

D

None

3
UPSC Civil Service Prelims Paper I 2025 (General Studies)
MCQ (Single Correct Answer)
+2
-0.66

Consider the following substances:

I. Ethanol

II. Nitroglycerine

III. Urea

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

A

Only one

B

Only two

C

All the three

D

None

4
UPSC Civil Service Prelims Paper I 2025 (General Studies)
MCQ (Single Correct Answer)
+2
-0.66

What is the common characteristic of the chemical substances generally known as CL-20, HMX and LLM105, which are sometimes talked about in media?

A

These are alternatives to hydro- fluorocarbon refrigerants

B

These are explosives in military weapons

C

These are high-energy fuels for cruise missiles

D

These are fuels for rocket propulsion