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UPSC Civil services Entrance exams General Studies test # General Science Determination of Income and Employment Prepare / Learn

Q1. The level of equilibrium income is determined by

A. AD and AS

B. AD and Consumption

C. AD and Investment

D. AD and national income

Answer : Option A
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science Indian Economy on the Eve of Independence Prepare / Learn

Q2. Life expectancy during colonial period was

A. 65

B. 32

C. 63

D. 30

Answer : Option B
Explaination / Solution:

Life expectancy in India was 32 years at the time of independence in 1947.

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

Q3. The chemical reaction in which reactants require high amount of activation energy are generally

A. Slow

B. Fast

C. Instantaneous

D. Spontaneous

Answer : Option A
Explaination / Solution:

If activation energy is high rate of reaction will decrease and reaction will be slow.

UPSC Civil services Entrance exams General Studies test # General Science Presentation of Data Prepare / Learn

Q4. Frequency curve

A. Passes through the origin

B. Begins at the horizontal line.

C. Begins and ends at the base line.

D. Begins at the origin

Answer : Option C
Explaination / Solution:

Data in the form of grouped frequency distributions are generally represented by frequency diagrams like histogram, frequency polygon, frequency curve and ogive.

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

Q6. Torque τ is defined in terms of position vector r and the force acting F as

A. τ=r.r×F

B. τ=F×r

C. τ=r×F.r

D. τ=r×F

Answer : Option D
Explaination / Solution:

Torque = Force x Perpendicular distance of the line of action of the force from the axis of rotation. It is also called moment of force.

torque is defined as the cross product of the vector by which the force's application point is offset relative to the fixed suspension point (distance vector) and the force vector, which tends to produce rotational motion.

$\vec{τ} = \vec{r} \times \vec{F}$

UPSC Civil services Entrance exams General Studies test # General Science Cell Cycle and Cell Division Prepare / Learn

Q7. The stage of inactivation of cell cycle due to non-availability of mitogens and energy rich compounds is called

A. S-phase

B. Quiescent phase

C. Interphase

D. M-phase

Answer : Option B
Explaination / Solution:

It is the stage of cell cycle during which the cells remain metabolically active and do not divide due to absence of mitogens and energy producing compounds.

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

Q8. A unit vector is a vector

A. having a magnitude of 1 and points in z-direction

B. having a magnitude of 1 and points in x-direction

C. having a magnitude of 1 and points in y-direction

D. having a magnitude of 1 and points in any chosen direction

Answer : Option D
Explaination / Solution:

A unit vector in a normed vector space is a vector (often a spatial vector) of length 1. A unit vector is often denoted by a lowercase letter with a circumflex, or "hat": $\hat{i}$ (pronounced "i-hat"). The term direction vector is used to describe a unit vector being used to represent spatial direction.

$\hat{i} =$ a unit vector directed along the positive x axis

$\hat{j}$ = a unit vector directed along the positive y axis

$\hat{k}$ = a unit vector directed along the positive z axis