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UPSC Civil services Entrance exams General Studies test # General Science Organic compounds containing Nitrogen Prepare / Learn

Q1. Pyridine typically undergoes________ electrophilic aromatic substitution as compared to benzene,

A. same

B. same or more

C. more

D. less

Answer : Option D
Explaination / Solution:

Pyridine is less reactive than benzene towards electrophilic aromatic substitution, because nitrogen is more electronegative than carbon and acts like an electron withdrawing group.

UPSC Civil services Entrance exams General Studies test # General Science National Income and Related Aggregates Prepare / Learn

Q2. Flow is a concept which is

A. is measured at a particular period of time.

B. is measured at a particular point of time.

C. is measured after a particular point of time.

D. Cannot be measured at a particular point of time.

Answer : Option A
Explaination / Solution:
No Explaination.

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

Q3. Submarine cables act as

A. spherical capacitor

B. cylindrical capacitor with outer cylinder earthed

C. cylindrical capacitor with inner cylinder earthed.

D. parallel plate capacitor

Answer : Option B
Explaination / Solution:

A submarine cable consists of an inner conductor which carries power. This conductor is covered by an insulator, which acts as a dielectric. The dielectric material is covered by a metal coating called shield, which is connected to ground.

The cable acts as a cylindrical capacitor, with the conductor acting as the inner cylinder, and the metal shield as the outer cylinder which is connected to earth.

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

Q4. What is the mass of 1 molecule of

O_{2}

A. 7.32 x

10^{- 23}

B. 5.32 x

10^{- 23}

C. 6.32 x

10^{- 23}

D. 4.32 x

10^{- 23}

Answer : Option B
Explaination / Solution:

Since ,as per Avogadro's law ,

the mass of 6.02 x $10^{23}$ molecules of $O_{2}$

= 32 g

$∴$ mass of 1 molecule of O2

= $\frac{32}{6.022 X 10^{2} 3} g$

= 5.32 x $10^{- 23}$ g

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

Q5. In the event of your stumbling upon a discovery, which has great academic interest but is certain to have nothing but dangerous consequences for the human society. How, if at all, will you resolve your dilemma?

A. Share it with your colleagues only without publicity if there is no way to save human society from dangerous consequences. Look for ways to save the human society along with your colleagues

B. Tell every Tom Dick and Harry about it

C. Keep it to yourself.

D. Tell the media

Answer : Option A
Explaination / Solution:

If an invention that only cause harm to the society, it should be in safe hands only and the safe hands are only who discovered it. So it's better to keep the information upto you and your colleagues, so that all of them can work on it to make it useful for society.

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

Q6. Indifference curve depicts

A. None of above

B. Affordability

C. Satisfaction

D. An equal quantity curve of a consumer

Answer : Option C
Explaination / Solution:
No Explaination.

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

Q7. At 500 K, equilibrium constant,

K_{c}

, for the following reaction is 5.2.

\frac{1}{2} H_{2} (g) + \frac{1}{2} I_{2} (g) ⇌

HI (g) What would be the equilibrium constant Kc for the reaction 2HI (g)

⇌

H_{2} (g) + I_{2} (g)

A. 2.5

B. 0.04

C. 0.4

D. 25

Answer : Option B
Explaination / Solution:

The second equation can be obtained by reversing the 1st reaction and multiplying by 2. So

K c_{n e w} = {(1 / K c_{o l d})}^{2}

Here ,

K_{c o l d}

=5.2

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

Q8. A particle moves with a constant velocity parallel to the x - axis. Its angular momentum with respect to the origin

A. is zero

B. goes on increasing

C. goes on decreasing

D. remains constant

Answer : Option D
Explaination / Solution:

As angular momentum is

\vec{L} = \vec{p} \times \vec{r} = m v r s i n θ

, Now rsinθ=perpendicular distance from x axis which is constant, so angular momentum is remains constant.

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

Q9. Water rises to a height of 16.3 cm in a capillary of height 18 cm above the water level. If the tube is suddenly cut at a height of 12 cm

A. water will flow down the sides of the capillary tube

B. water will stay at a height of 12 cm in the capillary tube

C. the height of the water in the capillary will be 10.3 cm

D. water will come as a fountain from the capillary tube

Answer : Option A
Explaination / Solution:
No Explaination.

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

Q10. Which layer produces new cell by mitosis?

A. Stratum corneum

B. Stratum granulosum

C. Stratum malpighi.

D. Stratum lucidum

Answer : Option C
Explaination / Solution:

Stratum Malpighi is the basal layer of skin epidermis having basal layer and generative layer that produces new cells by mitosis.