Previous year MCQs

General science UPPSC 2019 GS-I
Question

What happens when some charge is placed on a soap bubble ?

Answer & Solution

Answer: (Detailed Solution Below)

Option A: Its radius increases

Detailed Solution:

The correct answer is “Its radius increases”.
When the charge is placed on the soap bubble, every part of the surface of the soap bubble has the same charge. So every part of the surface of the soap bubble will repel every other part of the surface which will increase the size (and hence radii) of the soap bubble.

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
Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).

Assertion (A): Sugarcane and sugar production in U.P. is more than Maharashtra but productivity is less.
Reason (R): Most of the sugar factories in Maharashtra are in cooperative sector.

Codes:
  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
Given below are two statements, one labelled as Assertion (A) and the other as Reason (R).

Assertion (A): Most of the vitamins are not synthesised in human body.
Reason (R): Human organ synthesise only essential micronutrients.

Select the correct answer form the code given below.
  1. A) Both (A) & (R) are true & (R) is correct explanation of (A)
  2. B) Both (A) & (R) are true, but (R) is not correct explanation of (A)
  3. C) (A) is true, but (R) is false.
  4. D) A) is false, but (R) is true.
With reference to the civil administration in 1905, which of the following statement is/are correct ?

1) Lord Curzon decided to rearrange the provincial boundaries.
2) A new provonce was constituted called East Bengal and Assam.
  1. A) 1 Only
  2. B) 2 Only
  3. C) Both 1 and 2
  4. D) Neither 1 nor 2
PARSEC is the unit of:
  1. A) Distance
  2. B) Time
  3. C) Light intensity
  4. D) Magnetic force
Which one of the following energy conversions takes place in carrying out the process of photosynthesis?
  1. A) light to chemical energy
  2. B) light to thermal energy
  3. C) thermal to biochemical energy
  4. D) heat to kinetic energy
Consider the following events.

1. First reptiles
2. First insects
3. Shelled animals
4. First mammals

Arrange the above events in Chronological order of their origin on the earth and select the correct answer from the codes given below:

Codes:
  1. A) 2 1 3 4
  2. B) 2 3 1 4
  3. C) 3 2 1 4
  4. D) 2 4 1 3
Which of the following particles has zero charge?
  1. A) Positron
  2. B) Neutrino
  3. C) Electron
  4. D) a-particle
The formula of baking soda is:
  1. A) KHCO3
  2. B) Na2CO3
  3. C) K2CO3
  4. D) NaHCO3
When ice melts, then the
  1. A) volume increases
  2. B) volume decreases
  3. C) mass increases
  4. D) mass decreases
The newly discovered high temperature superconductors are?
  1. A) Metal alloys
  2. B) Pure rare earth metals
  3. C) Ceramic oxides
  4. D) Inorganic polymers
With reference to Mansabdari System, which of the following statement(s) is/are correct ?

1) Mansabdari System was official nobility of state started by, Akbar.
2) A mansabdar was hereditary.
  1. A) 1 Only
  2. B) 2 Only
  3. C) Both 1 and 2
  4. D) Neither 1 nor 2