General Science | General Studies test | UPSC Civil services Entrance exams Online Objective Test

# UPSC Civil services Entrance exams # General Studies test # General Science # TN 11th Zoology Prepare / Learn

Q1. Doctors use stethoscope to hear the sound; produced during each cardiac cycle. The second sound is heard when:

A. AV node receives signal from SA node

B. AV valves

C. Ventricular wall vibrate due to gushing of blood from atria

D. Semilunar valves close down after the blood flows into vessels from Ventricles

Answer : Option D
Explaination / Solution:
No Explaination.

# UPSC Civil services Entrance exams # General Studies test # General Science # CBSE 12th Physics Prepare / Learn

Q2. Two cells of 1.25 V and 0.75 V are connected in series with anode of one connected to cathode of the other . The effective voltage will be

A. 0.50 V

B. 2.0 V

C. 1.25 V

D. 0.75 V

Answer : Option B
Explaination / Solution:

The cells support each other.

E_{e q} = E_{1} + E_{2} = 1.25 + 0.75 = 2.0 V

# UPSC Civil services Entrance exams # General Studies test # General Science # CBSE 11TH PHYSICS Prepare / Learn

Q3. The pendulum of a wall clock executes

A. an oscillatory motion

B. a translatory motion

C. a rotary motion

D. a circular motion

Answer : Option A
Explaination / Solution:

It executes simple harmonic motion because in this motion restoring force is directly proportional to the displacement towards the mean position at any time.

# UPSC Civil services Entrance exams # General Studies test # General Science # CBSE 12th Biology Prepare / Learn

Q4. Flow of energy in our ecosystem takes place

A. only in one direction

B. may occur in multiple directions

C. in three dimensions

D. possible in two directions

Answer : Option A
Explaination / Solution:

In ecosystem, flow of energy takes place in only one direction. The flow of energy takes place from producers to final consumers. Energy present in one trophic levels nevers return back to producer.

# UPSC Civil services Entrance exams # General Studies test # General Science # CBSE 12TH CHEMISTRY Prepare / Learn

Q5. Which among the following is an ambidentate ligand?

A. Carbonyl

B. Acetate

C. Oxalate

D. Nitro

Answer : Option D
Explaination / Solution:

O N O^{-}

and

N {O_{2}}^{-}

# UPSC Civil services Entrance exams # General Studies test # General Science # CBSE 12TH PHYSICS Prepare / Learn

Q7. Is light a particle or a wave?

A. Both particle and wave approaches help us understand different phenomenon

B. Light is schizophrenic i.e. sometimes it behaves like a particle and other times like a wave.

C. Light is a set of particles

D. Light is a set of waves

Answer : Option A
Explaination / Solution:

Light is an electro magnetic wave, it has dual nature and behave as both particle and wave

# UPSC Civil services Entrance exams # General Studies test # General Science # CBSE 11TH CHEMISTRY Prepare / Learn

Q8. Hydrogen has the simplest atomic structure among all the elements around us in Nature. Its electronic configuration is

1 s^{2}

2 s^{1}

B. 2s1

C. 1s1

D. 1s12s1

Answer : Option C
Explaination / Solution:

As Hydrogen has 1 electron which fills in orbital of s subshell of First Shell.

# UPSC Civil services Entrance exams # General Studies test # General Science # CBSE 12th Biology Prepare / Learn

Q9. Best method to increase crop yield is

A. Using more fertilizers

B. Eradication of weeds

C. Using tractors

D. Sowing seeds of improved varieties

Answer : Option D
Explaination / Solution:

Crop production can be increased by adopting a number of methods like using seeds of improved varieties, using modern method of agriculture, using fertilizers and pesticides. An improved seed variety is most important for better yield.

# UPSC Civil services Entrance exams # General Studies test # General Science # TN 11th Chemistry Prepare / Learn

Q10. What would be the IUPAC name for an element with atomic number 222?

A. bibibiium

B. bididium

C. didibium

D. bibibium

Answer : Option D
Explaination / Solution:
No Explaination.