Previous year MCQs

General science UPPSC 1994 GS-I
Question

When a glass rod is placed in steam, its length increases but its width:

Answer & Solution

Answer: (Detailed Solution Below)

Option D: becomes irregular

Detailed Solution:

The correct answer is “becomes irregular”.

This heat energy causes the glass rod to expand in length due to thermal expansion. However, the expansion in width is not uniform because the glass rod is not a perfect conductor of heat.

Similar Questions:

Relative humidity of atmosphere is measured by:
  1. A) Hydrometer
  2. B) Hygrometer
  3. C) Potentiometer
  4. D) Lactometer
Which acid is used in photography:
  1. A) Formic acid
  2. B) Oxalic acid
  3. C) Citric acid
  4. D) Acetic acid
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
According to J.V. Narlikar which of the following has so far NOT been considered as a science?
  1. A) Astrology
  2. B) Astronomy
  3. C) Cosmology
  4. D) Nanotechnology
Which of the following hormones is secreted by the Beta cell of Islet of Langerhans of Pancreas?
  1. A) Glucagan
  2. B) Adrenalin
  3. C) Insulin
  4. D) Aldosterone
Two Home Rule Leagues were started in 1915-16 under the leadership of:
  1. A) Tilak and Annie Besant
  2. B) Tilak and Aurobindo Ghosh
  3. C) Tilak and Lala Lajpat Rai
  4. D) Tilak and Vipin Chandra Pal
Nitrogen is NOT an essential constituent of:
  1. A) Chlorophyll
  2. B) RNA
  3. C) DNA
  4. D) Carbohydrate
Which one of the following pairs is not correctly matched?
  1. A) Discovery of Meson – Hideki Yukawa
  2. B) Discovery of positron – C.D. Anderson & U.F. Hess
  3. C) Theory of energy production – H.A. Bethe in the sun and stars
  4. D) Synthesis of transuranic elements – Enrico Fermi
Tetraethyl lead (TEL) is added to petrol:
  1. A) To prevent its freezing
  2. B) To increase its flash point
  3. C) To increase anti-knocking rating
  4. D) To increase its boiling point
Which one of the following forms an irreversible complex with haemoglobin of the blood?
  1. A) Carbon dioxide
  2. B) Pure Nitrogen gas
  3. C) Carbon monoxide
  4. D) A mixture of carbon dioxide and helium
The important metal used with iron to produce stainless steel, is:
  1. A) Aluminium
  2. B) Chromium
  3. C) Tin
  4. D) Carbon
Match List - I with List - II and select the correct answer using the codes given below the lists:
List - I (Substance) - List - II (Use)

A. Blue Vitriol - 1. Artificial rain
B. Eosin - 2. Fungicide
C. Silver iodide - 3. Red ink
D. Zinc phosphide - 4. Rodenticide
  1. A) 2 3 4 1
  2. B) 2 1 3 4
  3. C) 2 3 1 4
  4. D) 2 4 1 3