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UPSC Civil services Entrance exams General Studies test # General Science Ray Optics and Optical Instruments Prepare / Learn

Q1. In a Young’s double-slit experiment, if the slits are of unequal width

A. distance between two consecutive bright fringes will not be equal to

B. bright fringe will not be formed at the centre of the screen

C. the positions of minimum intensity will not be completely dark

D. fringes will not be formed

Answer : Option C
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science Human Health and Disease Prepare / Learn

Q2. Suddenly any person gets rid of Alcohol or drug then which kind of deficiency occurs in that person?

A. Drowns syndrome

B. Mendal Syndrome

C. Turner syndrome

D. Cry-du-chat syndrome

Answer : Option D
Explaination / Solution:

When a person suddenly stops taking alcohol or drug than he may develop deficiency syndrome called visual syndrome in person accommodating power decrease suddenly. Cry-du-chat syndrome is a genetic disease.

UPSC Civil services Entrance exams General Studies test # General Science Introduction to Economics Prepare / Learn

Q3. Increasing MOC mean

A. Concave PPC

B. Straight PPC

C. Convex PPC

D. Inverted PPC

Answer : Option A
Explaination / Solution:

It reflects that as the output of good X is increased,the output of goodY is decreasing. Therefore the shape of ppc becomes concave to the origin. The slope of ppc shows increasing moc which tends to rise when resources are shifted from the production of one good to another .

UPSC Civil services Entrance exams General Studies test # General Science Neural Control and Coordination Prepare / Learn

Q4. Reticular activating system (RAC) of brain :

i. it works as a bridge to connect the lower brain to the upper brain.
ii. it helps usto focus on the important things and evade the useless things.

A. Statement i) is wrong and ii) is correct.

B. both are wrong

C. Statement i) is correct and ii) is wrong.

D. both are correct

Answer : Option D
Explaination / Solution:

Reticular activating system (RAC) of brain works as a bridge to connect the lower brain to the upper brain. It helps to focus on the important things and evade useless things.

UPSC Civil services Entrance exams General Studies test # General Science Structure of Atom Prepare / Learn

Q6. One of the orbitals is non-directional

A. p- orbital

B. d- orbital

C. f- orbital

D. s- orbital

Answer : Option D
Explaination / Solution:

Orbitals with subshell quantum number l = 0 are called s orbitals. All s orbitals are spherical in shape and have spherical symmetry. This means that the wave function will depend only on the distance from the nucleus and not on the direction.

UPSC Civil services Entrance exams General Studies test # General Science Thermal Properties of Matter Prepare / Learn

Q7.

A steel tape 1m long is correctly calibrated for a temperature of 27.0 $^{\circ}$ C. The length of a steel rod measured by this tape is found to be 63.0 cm on a hot day when the temperature is 45.0 $^{\circ}$ C. What is the actual length of the steel rod on that day? Coefficient of linear expansion of steel = 1.20 $\times$ $1 0^{- 5}$ $K^{- 1}$

K^{- 1}

A. 63.0126 cm

B. 63.0136 cm

C. 63.0146 cm

D. 63.0116 cm

Answer : Option B
Explaination / Solution:

$Δ l = α l Δ T = 1.20 \times 10^{- 5} \times 63 \times 18 = 0.0136 c m$

final length =63.0136cm

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

Q8. The greenhouse effect is where:

A. Solar panels are attached to the roofs of houses

B. You take gardening too seriously

C. Too many buildings are built from glass

D. Heat energy is trapped by the atmosphere

Answer : Option D
Explaination / Solution:

The greenhouse effect is where heat energy is trapped by the atmosphere

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

Q10. Degree of Correlation Between + 0.25 and + 0.75 is

A. High

B. Moderate

C. Perfect

D. Low

Answer : Option B
Explaination / Solution:

If value of r is close to 0, correlation is said to be low, while the values of r close to ±1 represent high correlation. Degree of correlation between +0.25 and +0.75 will therefore be moderate.