Previous year MCQs

General science UPPSC 1996 GS-I
Question

Which one of the following is used in food preservation?

Answer & Solution

Answer: (Detailed Solution Below)

Option C: Benzoic Acid

Detailed Solution:

The correct answer is “Benzoic Acid”.
Sodium Benzoate (salt of Benzoic acid) is used as food preservatives.

Similar Questions:

Assertion (A): A black hole is an astronomical entity that cannot be seen by telescope.
Reason (R): The gravitational field on a black hole is so strong that it does not allow even light to escape.

Select the correct answer using the codes given below:
Codes:
  1. A) Both A and R are true and R is the correct explanation of A
  2. B) Both A and R are 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
Consider the following statements:

Assertion (A): India's nuclear policy incorporates its unpreparedness to open its nuclear plants for international inspection.
Reason (R): India will not produce any nuclear bomb.

Select your answer from the code given below:
  1. A) Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B) Both (A) and (R) are true but (R) is not the correct explanation
  3. C) (A) is true and (R) is false
  4. D) (A) is false but (R) is true
Which one of the following statements is not true for a person suffering from hypermetropia?
  1. A) The person can see far objects distinctly.
  2. B) The focal length of the lens is large.
  3. C) The image of the close objects is focussed behind the retina.
  4. D) A concave lens is used to correct this defect.
The phenomenon used in optical fibre for transmission of light energy is
  1. A) Total internal reflection
  2. B) Diffraction
  3. C) Scattering
  4. D) Refraction
At which temperature superconductivity can be of tremendous economic interest saving billions of rupees?
  1. A) At very low temperature
  2. B) At a temperature when semiconductor becomes a superconductor
  3. C) At room temperature
  4. D) At a very high temperature
Match lists-I and List-II and select the correct answer from the code given below:
List-I (Physical Quantities) - List-II (Units)

A. Acceleration - 1. Joule
B. Force - 2. Newton-second
C. Work done - 3. Newton
D. Impulse - 4. Metre/Second2

Code:
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 1 2
Which yeast is used for commercial production of ethanol?
  1. A) Candida Albicans
  2. B) Saccharomyces cerevisiae
  3. C) Candida sloofi
  4. D) Leucosporidium frigidum
Which of the following is NOT obtained from insects?
  1. A) Silk
  2. B) Honey
  3. C) Lac
  4. D) Pearl
Who described Mahatma Gandhi for the first time as the "Father of the Nation"?
  1. A) Sarojini Naidu
  2. B) Sardar Patel
  3. C) Jawahar Lal Nehru
  4. D) Subhash Chandra Bose
The unit of work is:
  1. A) Joule
  2. B) Newton
  3. C) Watt
  4. D) Dyne
The first three leading producers of sugar in India are:
  1. A) Maharashtra, U.P., Tamil Nadu
  2. B) U.P., Maharashtra, Bihar
  3. C) U.P., Maharashtra, Karnataka
  4. D) Bihar, U.P, Maharashtra
Who among the following did not approve the idea of Cooperative farming in India?
  1. A) Jawahar Lal Nehru
  2. B) Lal Bahadur Shastri
  3. C) Charan Singh
  4. D) Abul Kalam Azad