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

Q1. Lichen can be used as industrial pollution indicators because

A. All of these.

B. They show dark colour in polluted area

C. They will not grow in polluted area

D. They will grow well in polluted area

Answer : Option C
Explaination / Solution:

The hardy lichens are useful bioindicators for air pollution, espeially sulfur dioxide pollution, since they derive their water and essential nutrients mainly from the atmosphere rather than from the soil. It also helps that they are able to react to air pollutants all year round. Lichens are symbiotic association between algae and fungi.

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

Q2. What will be the minimum pressure required to compress 500

d m^{3}

of air at 1 bar to 200

d m^{3}

3 0^{\circ} C ?

A. 2.5 bar

B. 3.5 bar

C. 2.0 bar

D. 1.5 bar

Answer : Option A
Explaination / Solution:

Using ideal gas equation, PV=nRT,

since T is constant, we have

$\begin{array}{l} P_{1} V_{1} = P_{2} V_{2} i . e . \\ 500 d m^{3} \times 1 b a r = 200 d m^{3} \times P_{2} \\ w h i c h g i v e s P_{2} = 2.5 b a r \end{array}$

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

Q3. Which of the following is not a general characteristic of equilibria involving physical processes?

A. All measurable properties of the system remain constant.

B. The opposing processes occur at the same rate and there is dynamic but stable condition

C. Equilibrium is possible only in a closed system at a given temperature.

D. All the physical processes stop at equilibrium.

Answer : Option D
Explaination / Solution:

All the physical processes stop at equilibrium.

UPSC Civil services Entrance exams General Studies test # General Science Anatomy of Flowering Plants Prepare / Learn

Q5. Which of the following do not undergo any secondary growth?

A. Monocotyledonous stem

B. Monocotyledonous root

C. Dicotyledonous stem

D. Dicotyledonous root

Answer : Option B
Explaination / Solution:

Secondary growth in monocotyledonous roots is not observed as cambium is absent between xylem and phloem in a vascular bundle.

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

Q6. Suppose you are given a chance to repeat the alpha-particle scattering experiment using a thin sheet of solid hydrogen in place of the gold foil. (Hydrogen is a solid at temperatures below 14 K.) What results do you expect?

A. there would be no large-angle scattering

there would be no scattering

there would be scattering at 90

^{\circ}

^{\circ}

D. there would be scattering at all angles

Answer : Option A
Explaination / Solution:
No Explaination.

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

Q7. In taxonomic hierarchy, the various categories are arranged in

A. Descending order

B. Ascending order

C. None of the above

D. Horizontal order

Answer : Option A
Explaination / Solution:

Kingdom -> Phylum/Division -> Class -> Order -> Family -> Genus -> Species. Hence, the correct option is Descending order.

UPSC Civil services Entrance exams General Studies test # General Science Plant Growth and Development Prepare / Learn

Q8. Which hormone is responsible for dormancy?

A. ABA

B. Auxin

C. Cytokinin

D. Gibberellin

Answer : Option A
Explaination / Solution:

Abscistic acid encourages fruit to drop and leaves to fall. When the plant is low on water abscistic acid closes the stomata, pores in the leaves. It encourages both seeds and plants to go dormant.The hormone induces seeds to produce proteins to store when the seeds are dormant.

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

Q9. The type of intermolecular interaction present in n-Hexane and n-Octane is

A. Ion-dipole interaction

B. Dipole-dipole interaction

C. Vander wall forces of interaction

D. Hydrogen bonding

Answer : Option C
Explaination / Solution:

Both are Non Polar.

UPSC Civil services Entrance exams General Studies test # General Science Indian Economy 1950 to 1990 Prepare / Learn

Q10. Inclusive growth can be achieved by

A. Reducing inequalities

B. Removing poverty

C. Providing social justice

D. All of these

Answer : Option D
Explaination / Solution:

Inlusive growth refers to advancing equitable opportunities with an objective to reduce inequality and poverty.