Previous year MCQs

General science UPPSC 2005 GS-I
Question

Wilhelm Rontgen invented

Answer & Solution

Answer: (Detailed Solution Below)

Option B: X-Ray Machine

Detailed Solution:

The correct answer is “X-Ray Machine”.
Wilhelm Röntgen invented the X-ray machine.

Similar Questions:

Which of the following contains carbon?
  1. A) Lignite
  2. B) Tin
  3. C) Silver
  4. D) Iron
Methane is present in the atmosphere of
  1. A) Moon
  2. B) Sun
  3. C) Jupiter
  4. D) Mars
Consider the following statements and select the correct answer from the code given below:

1. Presence of calcium sulphate makes water hard and unfit for use.
2. Diamond is harder than copper and iron.
3. The main component of air is oxygen.
4. Nitrogen is used in the preparation of vegetable ghee.

Code:
  1. A) 1 and 2
  2. B) 3 and 4
  3. C) 1 and 3
  4. D) 2 and 4
Tapa cloth is obtained from the plants of which one of the following family?
  1. A) Asclepiadaceae
  2. B) Moraceae
  3. C) Graminae
  4. D) Malvaceae
When water is filled in a bottle and allowed to freeze, the bottle breaks because:
  1. A) Water expands on freezing
  2. B) Bottle contracts at freezing point
  3. C) Temperature outside the bottle is more than inside
  4. D) Water expands on heating
Double-helical structure of DNA was given by whom ?
  1. A) Jacob and Monod
  2. B) Watson and Crick
  3. C) H.G. Khorana
  4. D) None of the above
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
When a glass rod is placed in steam, its length increases but its width:
  1. A) remains unchanged
  2. B) decreases
  3. C) increases
  4. D) becomes irregular
The famous "Bubble Baby Disease" is so called because:
  1. A) It is caused by water dubbles
  2. B) The suffering baby makes bubbles of saliva
  3. C) The suffering baby is treated in a germ-free plastic bubble
  4. D) It is cured only water bubble
Which of the following material is bio-degradable ?
  1. A) Glass bottle
  2. B) Plastic cups
  3. C) Aluminium foil
  4. D) Wool
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