Previous year MCQs

General science UPPSC 2023 GS-I
Question

Which of the following is known as laughing gas?

Answer & Solution

Answer: (Detailed Solution Below)

Option B: Nitrous Oxide

Detailed Solution:

The correct answer is “Nitrous Oxide”.
Nitrous Oxide (N₂O) is commonly known as laughing gas because it has anesthetic properties and can cause feelings of euphoria or laughter when inhaled. It is often used in dentistry and as a mild anesthetic.

Similar Questions:

When a glass rod is placed in steam, its length increases but its width:
  1. A) remains unchanged
  2. B) decreases
  3. C) increases
  4. D) becomes irregular
Which of the following particles has zero charge?
  1. A) Positron
  2. B) Neutrino
  3. C) Electron
  4. D) a-particle
It is difficult to walk on ice than on road because:
  1. A) Ice is harder than road
  2. B) Road is harder than ice
  3. C) Ice does not offer any reaction when we push it with our foot
  4. D) Ice has a lesser friction than road
With reference to the Captain Hawkins, which of the following statements is correct?

(1) He came to India in 1611 as an envoy of James - I.
(2) He was very well versed in Turkish language.
  1. A) Only 1
  2. B) Only 2
  3. C) Both 1 and 2
  4. D) Neither 1 nor 2
When doctor tells a person that he/she has been affected with tetraplegia, it means that he/she is suffering from paralysis of:
  1. A) right hand only
  2. B) left hand only
  3. C) his both legs only
  4. D) both hands and both legs
I.C. chips for computers are usually made of:
  1. A) leaf
  2. B) chromium
  3. C) silicon
  4. D) gold
With reference to the Human Development Report, 2021-22, which of the following statement is/are correct?

(1) India's rank on the Human Development Index has upgraded from 130 in 2020 to 132 in 2022.
(2) India's rank on the Human Development Index has stripped from 130 in 2020 to 132 in 2022.

Select the correct answer using the code given below—
Code-
  1. A) Only 1
  2. B) Only 2
  3. C) Both 1 and 2
  4. D) Neither 1 nor 2
PARSEC is the unit of:
  1. A) Distance
  2. B) Time
  3. C) Light intensity
  4. D) Magnetic force
Which one of the following (Passes - States/U.T.) is correctly matched?
  1. A) Aghil — Arunachal Pradesh
  2. B) Diphu — Ladakh
  3. C) Niti — Uttarakhand
  4. D) Mana — Himachal Pradesh
Cryogenic engines are used in
  1. A) Rockets
  2. B) Atomic reactors
  3. C) Defrost refrigerators
  4. D) Doing research connected with superconductivity
Which one of the following is the main objective of Janani Suraksha Yojana?
  1. A) Reduction in maternal mortality rate only
  2. B) Reduction in neo-natal mortality rate only.
  3. C) Reduction in infant mortality rate only
  4. D) Reduction in maternal and neo-natal mortality rate
Which of the following is NOT correctly matched ?
  1. A) Acid present in vinegar - Acetic acid
  2. B) Compound present in bones - Calcium phosphate
  3. C) Souring of milk - Nitric acid
  4. D) Acid present in gastric juice - Hydrochloric acid