Previous year MCQs

General science UPPSC 2006 GS-I
Question

The most commonly used substance in fluorescent tubes are

Answer & Solution

Answer: (Detailed Solution Below)

Option C: mercury vapour and argon

Detailed Solution:

The correct answer is “mercury vapour and argon”.

The most commonly used substance in fluorescent tubes is mercury vapor and argon.

Similar Questions:

Which one of the following pairs is not correctly matched?
  1. A) Dry ice:solid carbon dioxide
  2. B) Mustard gas:poisonous liquid used in chemical warfare
  3. C) Teflon:polymer containing fluorine
  4. D) Fullerene:organic compounds containing fluorine
Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R)

Assertion (A) : Relative humidity decreases with increasing air temperature.
Reason (R) : Absolute humidity increases with increasing evaporation.

Select the correct answer from the codes given below:
  1. A) Both(A) and (R) are true, but (R) is not the correct explanation of(A).
  2. B) (A) is false, but (R) is true
  3. C) Both (A) and (R) are true and (R) is the correct explanation of (A)
  4. D) (A) is true, but (R)is false.
Which of the following is not correctly matched ?
  1. A) Vitramin B6 - Rice Bran
  2. B) Vitamin B2 - Cod-liver oil
  3. C) Vitamin E - Wheat Germ Oil
  4. D) Vitamin K - Alfalafa
Consider the following statements and give the answer with the help of codes given below:

Assertion (A): Only one side of the moon's surface is visible from the earth.
Reason (R): The period of rotation of the moon on its axis is equal to the period of its revolution round the earth.

Code:
  1. A) Both A and R are correct and R is the correct explanation of A.
  2. B) Both A and R are correct but R is not the correct explanation of A.
  3. C) A is correct but R is wrong.
  4. D) A is wrong but R is correct.
The essential element in all organic compounds is:
  1. A) Nitrogen
  2. B) Oxygen
  3. C) Carbon
  4. D) Sulphur
How many times Financial Emergency has been declared in India so far?
  1. A) 5 times
  2. B) 4 times
  3. C) Once
  4. D) Never
Match List-I with List-II and select the correct answer using the codes given below the lists.
List-I List-II
(Disease) (Cause)

A. Marasmus - 1. Prolonged Starvation
B. Kwashiorkor - 2. Protein Deficiency
C. T.B. - 3. Bacterial Infection
D. Hepatitis B - 4. Viral Infection
  1. A) 1 2 3 4
  2. B) 2 1 3 4
  3. C) 4 2 3 1
  4. D) 2 4 1 3
Consider the following statements about Uttar Pradesh

1. Literacy percentage as per 2001 2011 census is 56.3.
2. The, density of population is 690 per square km.
3. The most populous district is Kanpur Nagar.
4. The largest population of scheduled castes is in district Sitapur.

Select the correct answer from the code given below:
Code: (1) (2) (3) (4) all the four
  1. A) 1 and 2 only
  2. B) 2 Only
  3. C) 4 Only
  4. D) 2 and 3 only
Which of the following types of glass can cut off ultraviolet rays?
  1. A) Soda glass
  2. B) Pyrex glass
  3. C) Jena glass
  4. D) Crookes glass
Which hormone is injected to cows and buffaloes to make the milk descend to the udders?
  1. A) Somatotropin
  2. B) Oxytocin
  3. C) Interferon
  4. D) Insulin
Where was the first Madarsa set up by the British in India?
  1. A) Madras
  2. B) Bombay
  3. C) Aligarh
  4. D) Calcutta
Which one of the following Noble Gases is not present in air?
  1. A) Helium
  2. B) Argon
  3. C) Radon
  4. D) Neon