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

Q1. Monochromatic light of wavelength 589 nm is incident from air on a water surface. What is the wavelength and speed of reflected light?

A. 589 nm, 3

\times 1 0^{8}

m/s

B. 590 nm, 3

\times 1 0^{8}

m/s

C. 582 nm,

\times 1 0^{8}

m/s

D. 599 nm,

3 \times 1 0^{8}

m/s

Answer : Option A
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science Magnetism and Matter Prepare / Learn

Q2. A short bar magnet placed with its axis at

30

with a uniform external magnetic field of 0.25 T experiences a torque of magnitude equal to

4.5 \times 1 0^{- 2}

J. What is the magnitude of magnetic moment of the magnet?

A. 0.30 J/T

B. 0.36 J/T

C. 0.33 J/T

D. 0.26 J/T

Answer : Option B
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science Biodiversity and Conservation Prepare / Learn

Q3. CES stands for:

A. Centre for Ecological sciences

B. Centre for Ecosystem services

C. Centre for Environmental sciences

D. Centre for Ecotype services

Answer : Option A
Explaination / Solution:

CES The Centre for Ecological Sciences, founded in 1983 with the support of the Ministry of Environment and Forests offers exciting opportunities for research in a variety of areas in ecology.

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

Q4. Which among the following will not show geometrical isomerism?

{[C o {(e n)}_{3}]}^{3 +}

[C o {(e n)}_{2} C l_{2}] C l

[C o {(e n)}_{2} C l_{2}] C l

[C r {(N H_{3})}_{4} C l_{2}] C l

Answer : Option A
Explaination / Solution:

{[C o {(e n)}_{3}]}^{3 +}

all ligands are same its symmetrical so doesnot exists as geometrical isomers.

UPSC Civil services Entrance exams General Studies test # General Science Chemical Coordination and Integration Prepare / Learn

Q5. Glucose will be lost in the urine of patients suffering from :

A. both diabetes mellitus and diabetes insipidus

B. low blood pressure

C. diabetes mellitus

D. diabetes insipidus

Answer : Option C
Explaination / Solution:

Glucose will be lost in the urine of patients suffering from diabetes mellitus. It a chronic lifelong condition that affects our body ability to use the energy found in blood.

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

Q6. Which among the following is monoecious?

A. Only leeches

B. Only Nereis

C. Only Earthworm

D. Earthworm and leeches

Answer : Option D
Explaination / Solution:

Earthworms and leeches are monoecious,contain both male and female reproductive organs in same individual.

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

Q7. For the reaction,

2 Cl (g) \to C l_{2} (g)

, what are the signs of

Δ H

and

Δ S

A. ΔH > 0, ΔS>0

B. ΔH < 0, ΔS<0

C. ΔH > 0, ΔS<0

D. ΔH < 0, ΔS>0

Answer : Option B
Explaination / Solution:

As in this cas e bond formation between two Cl atom is taking place so energy will be released so ΔH<0 and since 2 atoms are combining to form 1 molecule randomness decreases so ΔS<0.

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

Q8. Three electrolytic cells A,B,C containing solutions of ZnSO4, AgNO3 and CuSO4, respectively are connected in series. A steady current of 1.5 amperes was passed through them until 1.45 g of silver deposited at the cathode of cell. How long did the current flow? What mass of copper and zinc were deposited?

A. 13.10 min, Copper 0.403g, Zinc 0.437 g

B. 16.20 min, Copper 0.487g, Zinc 0.437 g

C. 14.40 min, Copper 0.427g, Zinc 0.437 g

D. 15.10 min, Copper 0.452g, Zinc 0.437 g

Answer : Option C
Explaination / Solution:

And mass of Zn and Cu deposited will be in ratio of their equivalent mass.

UPSC Civil services Entrance exams General Studies test # General Science Money and Banking Prepare / Learn

Q9. The narrow definition of money is not based on

A. Store of value function

B. Medium of payment function

C. Both A & B

D. Cant’ say

Answer : Option A
Explaination / Solution:
No Explaination.

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

Q10. For forward biasing a P-N junction the positive terminal of the battery is connected to

A. N – type crystal

B. Neither P – type nor N – type crystal

C. P – type crystal

D. Either P –type or N – type crystal

Answer : Option C
Explaination / Solution:

Biasing is the application of a voltage across a p–n junction.

When we connect p-type region of a junction with the positive terminal of a voltage source and n-type region with the negative terminal of the voltage source, then the junction is said to be forward biased.

At this condition, due to the attraction of positive terminal of source, electrons which participated in covalent bond creations in p-type material, will be attracted towards the terminal.