General Knowledge

Science & Technology

Medium

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Diamond is used for cutting glass.

Reason (R) : Diamond has a high refractive Index.

In the light of the above statements, choose the most appropriate answer from the options given below :

(A) is correct but (R) is not correct

(A) is not correct but (R) is correct

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

✅ Correct Option: 4

Diamond is indeed used for cutting glass (A is correct). Diamond does have a high refractive index of about 2.42 (R is correct). However, the reason diamond cuts glass is its extreme hardness (hardest natural material), not its refractive index. Therefore R is not the correct explanation of A.

2026: 24 May Shift 1

Choose the correct sequence with the year of launching of Indian satellites in a chronological order starting with the launching of first satellite :

(A) Mangalyaan

(B) INSAT 1A

(D) Aryabhatta

Choose the correct answer from the options given below:

2023: 28 May Shift 1

Bohr model is __________.

2025: 23 May Shift 1

Match List-I with List-II

List-I	List-II
SI Unit	Electrical Parameters
(A) Volt	(I) Electric Charge
(B) Coulomb	(II) Resistance/Resistivity
(C) Ohm	(III) Electric Current
(D) Ampere	(IV) Electric Potential Difference

Choose the correct answer from the options given below:

2023: 28 May Shift 1

A solution with a pH value of more than 7 is called __________.

2023: 1 June Shift 1

1 kilo Watt-hour (kWh) is equals to

2022: 23 Aug Shift 1

The speed of light is:

Solution

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