Previous year MCQs

General science UPPSC 1995 GS-I
Question

When water is filled in a bottle and allowed to freeze, the bottle breaks because:

Answer & Solution

Answer: (Detailed Solution Below)

Option A: Water expands on freezing

Detailed Solution:

The correct answer is “Water expands on freezing”.
When water freezes, it expands and occupies a larger volume. This increased pressure on the bottle's walls eventually causes it to break.

Similar Questions:

Assertion (A): Lighting a candle in space does not produce a flame.
Reason (R): A flame exists due to the pull of gravity.

In the context of the above, which one of the following is correct?
  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.
A powerful eye irritant in the smoke is:
  1. A) Ozone
  2. B) Sulphur dioxide
  3. C) Carbon dioxide
  4. D) Peroxyacetyle nitrate
Dinosaurs were:
  1. A) Cenozoic reptiles
  2. B) Mesozoic birds
  3. C) Palaeozoic amphibia
  4. D) Mesozoic reptiles
What is the function of the thermostat in a refrigerator?
  1. A) To lower the temperature
  2. B) To increase the freezing point
  3. C) To maintain constant temperature
  4. D) To decrease the melting point
Which one of the following organs will not feel any pain on being pricked by a needle?
  1. A) Skin
  2. B) Brain
  3. C) Eye
  4. D) Heart
The only vein that carries oxygenated blood is:
  1. A) Pulmonary vein
  2. B) Cystic vein
  3. C) Cardiac vein
  4. D) Hepatic Portal vein
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
Consider the following statements about haemoglobin:

1) It carries oxygen in the blood.
2) It is iron containing compound.
3) It provides immunity against certain disease.
4) It imparts red colour to the blood.

The correct statements out of these are:
  1. A) 1,2 and 3
  2. B) 2, 3 and 4
  3. C) 1, 3 and 4
  4. D) 1, 2 and 4
Photovoltaic cells are:
  1. A) Solar cells
  2. B) Thermal cells
  3. C) Sulphur cells
  4. D) Molar cells
Which one of the following minerals is necessary to control heart beat?
  1. A) Sodium
  2. B) Sulphur
  3. C) Potassium
  4. D) Iron
Which of the following material is bio-degradable ?
  1. A) Glass bottle
  2. B) Plastic cups
  3. C) Aluminium foil
  4. D) Wool
Which of the following is NOT obtained from insects?
  1. A) Silk
  2. B) Honey
  3. C) Lac
  4. D) Pearl