Previous year MCQs

General science UPPSC 2001 GS-I
Question

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:

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”.
The answer is (1) Both A and R are true and R is the correct explanation of A.

Similar Questions:

Urea is:
  1. A) A nitrogen-containing organic compound
  2. B) A nitrogen-containing inorganic compound
  3. C) A plant hormone
  4. D) An Endergonic compound
Which one of the following states of India is the least densely populated?
  1. A) Arunachal Pradesh
  2. B) Sikkim
  3. C) Jharkhand
  4. D) Chhattisgarh
Normal temperature of human body is 98.4°F. Its equivalent temperature in °C is:
  1. A) 40.16
  2. B) 36.89
  3. C) 35.72
  4. D) 32.36
'Big-bang theory' explains the origin of
  1. A) Mammals
  2. B) Ice age
  3. C) Universe
  4. D) Ocean
The World Chess Championship 2000 was won by:
  1. A) Alexei Shirov
  2. B) Vishwanathan Anand
  3. C) Alexander Khalifman
  4. D) Kasparov
A person meets with an accident and needs blood - transfusion but there is no time to check his blood group. Which of the following blood groups could be given to him?
  1. A) O+
  2. B) O–
  3. C) AB+
  4. D) AB–
Arrange the following states in descending order of per capita income of the year 1998-99 and select the correct answer from the codes given below:

A. Maharashtra
B. Gujarat
C. Uttar Pradesh
D. Punjab

Codes:
  1. A) DBAC
  2. B) DACB
  3. C) BDAC
  4. D) ADBC
Match List-I with List-II and select the correct answer using the codes given below the lists:
List-I List-II
(Naturally occurring substance) - (Elements present)

A. Diamond - 1. Calcium
B. Marble - 2. Silicon
C. Sand - 3. Aluminum
D. Ruby 4. Carbon

Codes:
A B C D
  1. A) 3 1 2 4
  2. B) 4 2 1 3
  3. C) 2 1 3 4
  4. D) 4 1 2 3
The number of images of an object placed between two parallel mirrors is:
  1. A) Two
  2. B) One
  3. C) Six
  4. D) Infinite
Neutron was discovered by:
  1. A) Chadwick
  2. B) Rutherford
  3. C) Bohr
  4. D) Newton
Which of the following statements is not true as per 1991 Census?
  1. A) Maharashtra had largest concentration of urban population in India.
  2. B) Goa was the most urbanised state of the country
  3. C) Class IV towns had the highest number of urban centres
  4. D) Class I cities has the highest concentration of the country's urban population
Fruits stored in a cold chamber exhibit longer storage life because:
  1. A) exposure to sunlight is prevented
  2. B) concentration of carbon dioxide in the environment is increased
  3. C) rate of respiration is decreased
  4. D) there is an increase in humidity