Previous year MCQs

General science UPPSC 2017 GS-I
Question

The stench due to leakage from the LPG cylinder is because of:

Answer & Solution

Answer: (Detailed Solution Below)

Option D: Ethyl mercaptan

Detailed Solution:

The correct answer is “Ethyl mercaptan”.
Ethyl mercaptan (also known as ethanethiol) is a sulfur-containing compound that is added to LPG (liquefied petroleum gas) to give it a distinctive odor. This is a safety measure to help detect leaks, as LPG itself is odorless.

Similar Questions:

Which bank has been established in China by BRICS countries?
  1. A) New Industrial Development Bank
  2. B) New Agricultural Development Bank
  3. C) New Development Bank
  4. D) New Commercial Bank
Which of the following is an element?
  1. A) Sand
  2. B) Diamond
  3. C) Marble
  4. D) Sugar
Which kind of light waves are used in remote control of television:
  1. A) Visible light
  2. B) Infrared
  3. C) X-rays
  4. D) J-rays
These days yellow lamps are frequently used as street light. Which one of the following is used in these lamps?
  1. A) Sodium
  2. B) Neon
  3. C) Hydrogen
  4. D) Nitrogen
What type of electromagnetic radiation is used in the remote control of a television?
  1. A) Infrared
  2. B) Ultraviolet
  3. C) Visible
  4. D) None of these
ABC Index announced by the Government of India is associated with which of the following?
  1. A) Agriculture
  2. B) Communication
  3. C) Health
  4. D) Education
Arrange the following schemes launched by Government of India in chronological order and choose the correct answer from the codes given below:
I. Sukanya Samriddhi Yojana
II. Atal Pension Yojana
III. Make in India
IV. Pradhan Mantri Jan-Dhan Yojana
  1. A) IV, III, I and II
  2. B) I, II, III and IV
  3. C) III, II, I and IV
  4. D) IV, I, Il and III
The unit of work is:
  1. A) Joule
  2. B) Newton
  3. C) Watt
  4. D) Dyne
Match List-I with List-II and select the correct answer from the codes given below the lists:
List-I List-II

A. Plague - 1. Protozoa
B. AIDS - 2. Fungus
C. Baldness - 3. Virus
D. Malaria - 4. Bacteria

A B C D
  1. A) 1 2 3 4
  2. B) 2 3 4 1
  3. C) 3 4 1 2
  4. D) 4 3 2 1
Consider the following statements regarding the performance of Mithali Raj in women's One Day International Cricket:

(A) She is the first ever to score more than 6000 runs.
(B) She scored a century on her debut.
(C) She holds the record for scoring 7 consecutive half centuries.
(D) She holds the world record for scoring the highest number of centuries.

Of the above, the correct statements are:
  1. A) A, B and C only
  2. B) B, C and D only
  3. C) A, B and D only
  4. D) C and D only
Given below are two statements, one labelled as:

Assertion (A): Human body synthesises all the vitamins required by it.
Reason (R): Vitamins are essential for proper growth of the body.

Select the correct answer from the codes give below:
  1. A) Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B) Both (A) and (R) re true but (R) is not the correct explanation of (A)
  3. C) (A) is true, but (R) is false
  4. D) (A) is false, but (R) is true
A sample of any of the following substances disappears after sometime when exposed to air like camphor, naphthalene or dry ice. This phenomenon is called:
  1. A) Sublimation
  2. B) Evaporation
  3. C) Diffusion
  4. D) Radiation