Previous year MCQs

General science UPPSC 1999 GS-I
Question

Assertion 'A' and Reason 'R' are given below. Study them and choose the correct answer from the codes given below:

Assertion (A): Lightning conductors prevent buildings from damages.
Reason (R): It passes the charge to the earth.

Codes:

Answer & Solution

Answer: (Detailed Solution Below)

Option A: Both A and R are true and R is the correct explanation of A

Detailed Solution:

The correct answer is “Both A and R are true and R is the correct explanation of A”.
Lightning conductors do indeed prevent buildings from damage.

They achieve this by providing a safe path for the electrical charge from a lightning strike to flow into the ground, rather than passing through the building and causing damage.

Similar Questions:

Match List-I with List-II and select the correct answer from the codes given below the lists:
List-I - List-II

A. Stethoscope - 1. To measure intensity of light
B. Sphygnomanometer - 2. to check purity of gold
C. Caratometer - 3. to hear heart sound
D. Lux meter - 4. to measure blood pressure

Code:
A B C D
  1. A) 1 2 3 4
  2. B) 4 3 2 1
  3. C) 3 4 2 1
  4. D) 2 1 4 3
The difference between nuclear reactor and atom bomb is that:
  1. A) There is no chain reaction in nuclear reactor where as this happens in atom bomb
  2. B) The chain reaction in nuclear reactor is controlled
  3. C) The chain reaction in nuclear reactor is not controlled
  4. D) Atom bomb is based on nuclear fusion whereas in nuclear reactor, nuclear fission occurs
Consider the following statements:

Assertion (A): LPG is a pollution free vehicular fuel.
Reason (R): Plying of CNG fuelled buses is recommended for metropolitan cities of India.

Select the correct answer using the code given below:
Code:
  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
Which of these is not a colloid:
  1. A) Milk
  2. B) Blood
  3. C) Ice-cream
  4. D) Honey
The Minamata disease of Japan in 1953 was caused by eating fish contaminated by:
  1. A) Nickel
  2. B) Lead
  3. C) Mercury
  4. D) Cadmium
A powerful eye irritant in the smoke is:
  1. A) Ozone
  2. B) Sulphur dioxide
  3. C) Carbon dioxide
  4. D) Peroxyacetyle nitrate
Given below are two statements:

Assertion [Al: Human body is incapable of digesting cellulose.
Reason [R]: Starch degrading enzyme, diastase, is found in the human body.

Choose the answer from the code given below:
Codes:
  1. A) Both [A] and [R] are true and [R] is the correct explanation of [A]
  2. B) Both [Al and [R] are true but [RI is not the correct explanation of [A]
  3. C) [A] is true but [R] is false
  4. D) Both [A] and [R] are false
The bacteria responsible for fixing nitrogen in Soyabean is:
  1. A) Rhizobium Leguminoserum
  2. B) Rhizobium japonicum
  3. C) Rhizobium phaseoli
  4. D) Rhizobium trifolii
The epigraphical evidence reveals that under the instructions of a Nanda king, a canal was dug in:
  1. A) Anga
  2. B) Vanga
  3. C) Kalinga
  4. D) Magadha
Laser is a device for producing
  1. A) spontaneous radiation
  2. B) dispersed radiation
  3. C) scattered radiation
  4. D) stimulated radiation
Given:

1. Blood cells
2. Bone cells
3. Hair strands
4. Saliva

Samples taken for DNA testing in criminal investigation can be
  1. A) 1, 2 and 3 only
  2. B) 1 and 4 only
  3. C) 2 and 3 only
  4. D) 1, 2, 3 and 4
Among the following greenhouse gases, which does not cause ozone pollution in troposphere?
  1. A) Methane
  2. B) Carbon mono-oxide
  3. C) Nitrogen oxides (NOX)
  4. D) Water vapours