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UPSC Civil services Entrance exams General Studies test # General Science The p-Block Elements Prepare / Learn

Q1. Which among the following does not exhibit positive oxidation state?

A. Oxygen

B. Nitrogen

C. Chlorine

D. Fluorine

Answer : Option D
Explaination / Solution:

Fluorine is most electronegative element, it shows only -1 oxidation state.

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

Q2. An indifference curve indicates, ceteris paribus?

A. Combinations of goods which yield to a consumer equal degrees of satisfaction

B. A consumer’s preference for any two goods

C. Combinations of goods which yield to a consumer different levels of satisfaction

D. Combinations of goods which yield to a producer different levels of satisfaction

Answer : Option A
Explaination / Solution:
No Explaination.

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

Q3. A solid sphere of mass M and radius R spins about an axis passing through its centre making 600 rpm. Its kinetic energy of rotation is

A. 2/5π2MR

B. 80π2MR2

C. 80πMR

D. 2/5πM2R2

Answer : Option B
Explaination / Solution:

Kinetic energy of rotation

K = $\frac{1}{2} I ω^{2}$

$n = \frac{600}{60} = 10$ revolution per second

angular velocity $ω = 2 π n = 2 π \times 10 = 20 π$ rad/sec

moment of inertia about an axis passing through centre of solid sphere

$I = \frac{2}{5} M R^{2}$

Kinetic energy of rotation

$K = \frac{1}{2} I ω^{2} = \frac{1}{2} \times \frac{2}{5} M R^{2} \times {(20 π)}^{2} = 80 π^{2} M R^{2}$

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

Q4. According to Stokes’ law if η is the coefficient of viscosity, 'R' the radius of the sphere and it is moving with a velocity v the viscous drag force F is given by

A. Fd=6πηR

B. Fd=6πηRv

C. Fd=2πηRv

D. Fd=6πRv

Answer : Option B
Explaination / Solution:

The force of viscosity on a small sphere moving through a viscous fluid is given by:
$F_{d} = 6 π η R v$

Where:

Fd is the frictional force – known as Stokes' drag – acting on the interface between the fluid and the particle
η is the dynamic viscosity
R is the radius of the spherical object
v is the flow velocity relative to the object.

In SI units, Fd is given in Newtons, η in Pa·s, R in meters, and v in m/s.

UPSC Civil services Entrance exams General Studies test # General Science Transport in Plants Prepare / Learn

Q5. Which of the following has highest water potential?

A. Distilled water

B. 1 M salt solution

C. 1 M sugar solution

D. 1 M sugar solution with 2-3 bar pressure

Answer : Option A
Explaination / Solution:

Distilled water do not contain any kind of salt in it so its water potential is 0. Addition of solute results into further decrease in water potential in negative term.

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

Q6. Spontaneity in the context of chemical thermodynamics means

A. having the potential to proceed instantaneously

B. having the potential to proceed fast

C. having the potential to proceed without the assistance of external agency

D. having the potential to proceed with the assistance of external agency

Answer : Option C
Explaination / Solution:

spontaneity means a reaction occurring on its own without any help of external agency.

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

Q7. Myelin sheath is derived from

A. Neuroglial cells

B. Nerve cells

C. None of these

D. Schwann cells.

Answer : Option D
Explaination / Solution:

The outer layer of axon of nerve cells is called myelin sheath. Myelin sheath is derived from Schwann cells.

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

Q8. A distinction between unicellular and multicellular is not possible in

A. Plantae

B. Algae

C. Protozoa

D. Animalia

Answer : Option B
Explaination / Solution:

Algae grouped together the unicellular organisms and the multicellular ones.

UPSC Civil services Entrance exams General Studies test # General Science Economic Reforms Since 1991 Prepare / Learn

Q9. Institutions that engage in mobilisation and allocation of savings

A. Financial

B. Banks only

C. Commercial

D. Educational

Answer : Option A
Explaination / Solution:

Financial Institutions by engaging in mobilisation and allocation of savings, act as a channel between the savers and borrowers of funds.

UPSC Civil services Entrance exams General Studies test # General Science Balance of Payments Prepare / Learn

Q10. Managed floating exchange rate is a system in which the

A. the Government allow the exchange rate to determined by market forces

B. None of the above

C. the central bank allow the exchange rate to determined by market forces

D. the central bank or Government allow the exchange rate to determined by market forces

Answer : Option D
Explaination / Solution:

Managed flow regeime is the current international finance environment in which exchange rates fluctuate from day to day, but central banks attempt to influence their countries' exchange rates by buying and selling currencies. It is also known as a dirty flow. In an increasingly integrated world economy, the currency rates impact any given country's economy through the trade balance. In this aspect, almost all currencies are managed since central bank or government intervene to influence the value of their currencies.