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

Q2. A country is said to be experiencing inflation when

A. Total output is falling over time.

B. Prices of most goods and services are rising over time

C. Total output is rising over time.

D. Prices of most goods and services are falling over time.

Answer : Option B
Explaination / Solution:
No Explaination.

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

Q3. A car moving at 60 km/h comes to a stop in 4.0 s. What was its deceleration?

A. -30 m/s2

B. -25 m/s2

C. 15 m/s2

D. 20 m/s2

Answer : Option C
Explaination / Solution:

initial velocity u = 60 m/s

As it stop final velocity v = 0

Time taken t = 4 s

We know,

$a = \frac{v - u}{t}$

$= \frac{0 - 60}{4} = - 15 m / s^{2}$

Negative sign shows it is declaration.

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

Q4. Two sinusoidal waves on the same string exhibit interference, adding or cancelling according to the principle of superposition. If the two are travelling in the same direction and have the same amplitude a and frequency but differ in phase by a phase constant φ, the result is a single wave with the same frequency ωω :If φ = 0 or an integral multiple of 2 π ,

A. the waves are exactly out of phase and the interference is constructive.

B. the waves are exactly in phase and the interference is constructive.

C. the waves are exactly out of phase and the interference is desstructive.

D. the waves are exactly in phase and the interference is destructive.

Answer : Option B
Explaination / Solution:
No Explaination.

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

Q6. A cross between AaBB X aaBB yields a genotypic ratio of

A. 3 AaBB : 1 aaBB

B. All AaBb

C. 1 AaBB : 3aaBB

D. 1 AaBB : 1 aaBB

Answer : Option D
Explaination / Solution:

Genotypic ratio of cross between AaBB and aaBB will be 1:1 as AaBB and aaBB in F1 generation.

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

Q7. Anaerobic respiration of yeast produces

A. Pyurvic acid

B. Citric acid

C. Malic acid

D. Ethanol

Answer : Option D
Explaination / Solution:

Anaerobic respiration in some microorganisms such as yeast produces ethanol and carbon dioxide, as opposed to lactic acid. Glucose is achieved under anaerobic conditions by sets of reactions. It can be summarised by the following equation: glucose → ethanol + carbon dioxide ( + energy released)

UPSC Civil services Entrance exams General Studies test # General Science Body Fluids and Circulation Prepare / Learn

Q8.

Read the following :

i. Blood vessels include arteries and veins. Arteries carry blood from heart to body parts and veins bring back blood from body parts to heart.
ii. The blood vessel which carry blood from heart to lungs is pulmonary artery and it carries oxygenated blood.

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

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

C. both are wrong

D. both are correct

Answer : Option A
Explaination / Solution:

Blood vessels includes arteries and veins. Arteries carry blood from heart to body parts and veins bring back blood from body parts to heart. Pulmonary artery carry deoxygenated blood.

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

Q9. A sewage treatment process in which a part of decomposer bacteria present in the wastes is recycled into the starting of the process is called

A. Activated sludge treatment

B. Cyclic treatment

C. Primary treatment

D. Tertiary treatment

Answer : Option A
Explaination / Solution:

Activated sludge treatment is a step in sewage treatment in which a part of decomposer bacteria present in wastes is recycled into the starting of treatment to maintain bacteria.

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

Q10. In NO-3 ion, the number of bond pairs and lone pairs of electrons on nitrogen atom are

A. 2, 2

B. 1, 3

C. 4,0

D. 3, 1

Answer : Option C
Explaination / Solution:

The nitrate ion is formed by the loss of the hydrogen ion, and so its structure is:

Around the central nitrogen there are 4 pairs of shared electrons, and no remaining lone pair. The original lone pair has now become a bonding pair. Two of those pairs make up a double bond. The double bond unit and the two single bonds arrange themselves as far apart as possible in a trigonal planar arrangement - exactly the same as the carbonate ion.