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

Q1. Saturated solution of

K N O_{3}

is used to make 'salt bridge' because

A. Saturated solution of

K N O_{3}

is used to make 'salt bridge' because

B. velocity of

K^{+}

is greater than that of

N O^{3 -}

C. velocity of both K⁺ and NO^3- are nearly th same

K N O_{3}

is highly soluble in water

Answer : Option C
Explaination / Solution:

Saturated solution of

K N O_{3}

is used in salt bridge because of same mobility o f

K^{+}

and

N O^{3 -}

UPSC Civil services Entrance exams General Studies test # General Science Inflation: Problem and Policies Prepare / Learn

Q2. Stagflation occurs when the

A. Price level and real GDP increase at the same time.

B. Price level decreases and real GDP increases.

C. Price level and real GDP decrease at the same time.

D. Price level increases and real GDP decreases

Answer : Option D
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science Motion in A Straight Line Prepare / Learn

Q3.

A stone thrown from the top of a building is given an initial velocity of 20.0 m/s straight upward. Determine the maximum height it travels in meters. g =9.8 m / $s e c^{2}$

A. 30.4

B. 15.4

C. 20.4

D. 25.4

Answer : Option C
Explaination / Solution:

Initial velocity u = 20.0 m/s

At maximum height stone ll be stopped,

So final velocity v = 0 m/s

Acceleration due to gravity a = g =

-9.8 m/s2 (-ve Because it is in opposite direction of motion)

Let maximum height = s

We know,

$v^{2} - u^{2} = 2 a s$

=> $0^{2} - (20)^{2} = 2 \times (- 9.8) s$

$=> - 400 = - 19.6 s$

$=> s = \frac{- 400}{- 19.6} = 20.4 m$

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

Q4. The volume of gas is reduced to half from its original volume. The specific heat will be

A. be doubled

B. reduce to half

C. remain constant

D. increase four times

Answer : Option C
Explaination / Solution:

Specific heat will remain constant.

UPSC Civil services Entrance exams General Studies test # General Science Botany-Principles of Inheritance and Variation Prepare / Learn

Q6. In human beings, if ovum fertilizes with a sperm carrying X-chromosome the zygote develops into

A. Male

B. Female

C. No fertilization

D. Sterile

Answer : Option B
Explaination / Solution:

Male produce two kinds of sperms, half carrying X and half carrying Y sex chromosome besides 22 autosomes. If ovum is fertilized by sperm carrying X chromosome the sex of child developed is female.

UPSC Civil services Entrance exams General Studies test # General Science Forms of Market and Price Determination Prepare / Learn

Q7. ____________ is an ideal market?

A. Monopoly

B. Oligopoly

C. Perfect competition

D. Monopolistic competition

Answer : Option C
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science Microbes in Human Welfare Prepare / Learn

Q8. A symbiotic relationship/interaction in which 'one species benefits and the other species is not affected' is called

A. Ectomycorrhizae

B. Commensalisms

C. Endomycorrhizae

D. Helotism

Answer : Option B
Explaination / Solution:

Commensalism is a relationship between two organisms where one receives a benefit or benefits from the other and the other is not affected by it. In other words, one is benefited and the other is neither benefited nor harmed.

Example:

Orchids - Some orchids grow on trees and that does not harm the tree.
Pilot fish - Pilot fish live around sharks, sea turtles and rays and eat the parasites that live on them as well as leftover food they do not eat. Young pilot fish gather around jellyfish and seaweeds.

UPSC Civil services Entrance exams General Studies test # General Science Chemical Bonding and Molecular Structure Prepare / Learn

Q9. In

{PO}_{4}^{3 -}

ion the formal charge on the oxygen atom of P–O bond is

A. + 0.75

B. – 0.75

C. + 1

D. – 1

Answer : Option D
Explaination / Solution:

Formal charge on the oxygen atom of P–O bond is – 1

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

Q10.

An ac generator consists of 8 turns of wire, each of area A=0.0900m² , and the total resistance of the wire is 12.0Ω. The loop rotates in a 0.500-T magnetic field at a constant frequency of 60.0 Hz. Maximum induced emf is

A. 136 V

B. 126 V

C. 106 V

D. 116 V