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UPSC Civil services Entrance exams General Studies test # General Science Electrostatic Potential and Capacitance Prepare / Learn

Q1. In electrolytic capacitors positive terminal is

A. either of the two terminals

B. one on which aluminium oxide film is formed

C. none of the above.

D. one on which aluminium oxide film is not formed

Answer : Option B
Explaination / Solution:

Aluminium electrolytic capacitors have the Aluminium foil anode (positive terminal) which is etched and covered with a layer of Aluminium Oxide which acts as a dielectric. The whole assembly is covered using a paper separator soaked in electrolyte such as, Borax or Glycol and covered by Aluminium foil which acts as cathode ( negative electrode)

UPSC Civil services Entrance exams General Studies test # General Science Some Basic Concepts of Chemistry Prepare / Learn

Q2.

Choose the most appropriate option to complete the statement -

" Whenever there is a rearrangement of atoms which makes or breaks chemical bonds ------------------------ "

A. catalysts are produced.

B. products appear,

C. reactants disappear

D. a chemical reaction takes place

Answer : Option D
Explaination / Solution:

The occurance of a chemical reaction is always associated with breaking & formation of bonds of the reactant and products along with rearrangement of their atoms , hence the statement at option 1 is most appropriate. ie. " Whenever there is a rearrangement of atoms which makes or breaks chemical bonds a chemical reaction takes place."

UPSC Civil services Entrance exams General Studies test # General Science Physical World Prepare / Learn

Q3. Strong Nuclear Force

A. is responsible for holding the nucleus of an atom together

B. is a long range force

C. is responsible for holding the nucleus of an atom and the electrons

D. is responsible for holding the electrons of an atom together

Answer : Option A
Explaination / Solution:

The strong nuclear force is the nuclear binding force, the force that provides the attraction.it might also be responsible for holding particles together within the nucleus of atoms.

UPSC Civil services Entrance exams General Studies test # General Science Consumers Equilibrium and Demand Prepare / Learn

Q4. Marginal utility curve of a given consumer is also his?

A. Supply curve

B. Indifference curve

C. Total utility curve

D. Demand curve

Answer : Option D
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science System of Particles and Rotational Motion Prepare / Learn

Q5.

The moment of inertia of a solid sphere about a diameter is 8000 gms $c m^{2}$ (mass of sphere = 50 gm, radius = 20 cm). The moment of inertia about a tangent will be

A. 8400 gm

c m^{2}

B. 280 gm

c m^{2}

C. 2.8

\times

1 0^{3}

c m^{2}

D. 2.8

\times

1 0^{3}

c m^{2}

Answer : Option D
Explaination / Solution:

I = 2/5 MR2 = 8000 gm cm2 , using parallel axis theorem the moment of Inertia about tangent to sphere is = 2/5 MR2+ MR2 = 7/5 MR2. =2.8 $\times$ $1 0^{4}$ gm cm2

$c m^{2}$

UPSC Civil services Entrance exams General Studies test # General Science Mechanical Properties of Fluids Prepare / Learn

Q6. Small droplets of liquid are usually more spherical in shape than larger drops of the same liquid because

A. force of gravity and force of surface tension act in the same direction and are equal

B. force of surface tension predominates the force of gravity

C. force of surface tension is equal and opposite to the force of gravity

D. force of gravity predominates the force of surface tension

Answer : Option B
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science Structural Organisation in Animals Prepare / Learn

Q7. Muscle forming cells are called

A. Phycoblast

B. Chromocyte

C. Myoblasts.

D. Monoblast

Answer : Option C
Explaination / Solution:

The muscle forming cells are called myoblasts cells. Myoblast is a type of embryonic progenitor cell that differentiates to give rise to muscle cells.

UPSC Civil services Entrance exams General Studies test # General Science Biological Classification Prepare / Learn

Q8. Plants complete their life cycle in two phase, saprophytic and gametophytic which occurs alternately called

A. Change in phases

B. Alternation of diploid and haploid

C. None of these

D. Alternation of generation

Answer : Option D
Explaination / Solution:

The multicellular haploid plant structure is called the gametophyte, which is formed from the spore and give rise to the haploid gametes. The fluctuation between these diploid and haploid stages that occurs in plants is called the alternation of generations.

UPSC Civil services Entrance exams General Studies test # General Science Hydrocarbons Prepare / Learn

Q9. Ozonolysis of an organic compound 'A' produces an equimolar mixture of acetone and propionaldehyde . Identify the organic compound 'A' .

A. 2 - Methyl - 2 - pentene

B. 2 - Pentene

C. 2 - Methyl - 1 - pentene

D. 1 - Pentene

Answer : Option A
Explaination / Solution:

2- Methyl -2 - pentene when treated with ozone forms an unstable ozonide intermediate . The ozonide when treated with $(z i n c - d u s t + H_{2} O)$ yields an aldehyde (propionaldehyde ) and a ketone ( acetone ) as the final products The conversion reactions are represented as below.