Previous year MCQs

UPPSC 2021 GS-I General science
Question

Which of the following particles has zero charge?

Answer & Solution

Answer: (Detailed Solution Below)

Option B: Neutrino

Detailed Solution:

The correct answer is “Neutrino”.
A neutrino is a subatomic particle that is very similar to an electron, but has no electrical charge and a very small mass, which might even be zero.

Neutrinos are one of the most abundant particles in the universe. Because they have very little interaction with matter, however, they are incredibly difficult to detect.

Similar Questions:

Site of gaseous exchange in lungs is:
  1. A) Tracheoles
  2. B) Bronchioles
  3. C) Pulmonary vein
  4. D) Alveoli
Stars obtain their energy from:

1. Nuclear fusion
2. Gravitational contraction
3. Chemical reaction
4. Nuclear fission

Select your answer from the codes given below:
Codes:
  1. A) 1 and 2
  2. B) 1, 2 and 3
  3. C) 1 and 4
  4. D) 2 and 4
The disease caused by deficiency of protein in children is
  1. A) Kwashiorkor
  2. B) Pellagra
  3. C) Beri beri
  4. D) Rickets
The dengue fever is caused by the bite of which of the following mosquitoes ?
  1. A) Asian tiger mosquito
  2. B) Aedes
  3. C) Culex
  4. D) Anopheles
In India the First Municipal Corporation was set up in which one among the following places ?
  1. A) Calcutta
  2. B) Madras
  3. C) Bombay
  4. D) Delhi
Gas engine was invented by:
  1. A) Diesel
  2. B) Davy
  3. C) Daimler
  4. D) Charles
Television viewers using dish antenna to receive satellite signals do not receive signals during rain because:

(A) Of the small size of the antenna.
(B) Rain droplets absorb the energy of radio waves.
(C) Rain droplets disperse the energy of radio waves from their original direction.

Which of the above statements are correct?
  1. A) Only A
  2. B) Only A and B
  3. C) Only B and C
  4. D) A, B and C
A Ball thrown outside from an artificial satellite revolving round the Earth will:
  1. A) Go on the Sun
  2. B) Go on the Moon
  3. C) Fall on the Earth
  4. D) Revolve round the Earth in the same orbit with the same time period as satellite
Match List I with List Il and select the correct answer using the code given below
List I [Product] - List II [Source]

(A) Opium - (a) Bark
(B) Hing - (b) Root
(C) Rubber - (c) Fruit
(D) Quinine - (d) Stem
  1. A) A-a, B-b, C-c, D-d
  2. B) A-c, B-b, C-d, D-a
  3. C) A-d, B-b, C-a, D-c
  4. D) A-b, B-d, C-c, D-a
What is the source of electrical energy in an artificial satellite ?
  1. A) Thermopile
  2. B) Solar cells
  3. C) Dynamo
  4. D) Small nuclear reactor
Which one of the following reflects back more sunlight as compared to the other three?
  1. A) Sand desert
  2. B) Paddy crop land
  3. C) Land covered with fresh snow
  4. D) Prairie Plain
Consider the following events.

1. First reptiles
2. First insects
3. Shelled animals
4. First mammals

Arrange the above events in Chronological order of their origin on the earth and select the correct answer from the codes given below:

Codes:
  1. A) 2 1 3 4
  2. B) 2 3 1 4
  3. C) 3 2 1 4
  4. D) 2 4 1 3