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UPSC Civil services Entrance exams General Studies test # General Science Dual Nature of Radiation and Matter Prepare / Learn

Q1. If h is Planck’s constant, the momentum of a photon of wavelength 0.01

\overset{0}{A}

1 0^{2}

1 0^{2}

1 0^{12}

D. h

Answer : Option A
Explaination / Solution:
No Explaination.

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

Q2.

There are two types of ozone

i. Good ozone and bad ozone.

ii. Good ozone is present in stratosphere while bad ozone is present in troposphere.

A. Both the statements are correct.

B. both the statements are correct Statement i) is correct but ii) is wrong

C. Statement ii) is correct but i) is wrong

D. Statement ii) is correct but i) is wrongBoth the statements are wrong

Answer : Option A
Explaination / Solution:

There are two types of ozone, bad ozone and good ozone. Bad ozone is present in troposphere, it is bad because it is a type of pollution. Ozone and other compounds in car exhaust form smog. Good ozone is present in stratosphere, it is good because it protect us from harmful UV radiations from the Sun.

UPSC Civil services Entrance exams General Studies test # General Science Haloalkanes and Haloarenes Prepare / Learn

Q3. The following compound is ,as per the IUPAC system

A. 2,2,3 – triethyl pent – 4 – ene

B. None of the above

C. 3,4,4 – triethyl pent – 2 – ene

D. 2diethyl, 3 – ethyl pentene

Answer : Option C
Explaination / Solution:

Longest chain contains double bond.

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

Q5. A body of mass m is taken from earth surface to the height h equal to radius of earth, the increase in potential energy will be

A. 14mgR

B. 12mgh

C. 2mgR

D. mgR

Answer : Option B
Explaination / Solution:

Work done=mgh1+hRIf h=R then,⇒Work done=mgh1+RR=12mgh

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

Q6. Choose the correct trend of the melting and boiling points in the alkali metal halides, MF, MCl, MI, MBr.

A. MCl > MBr > MI

B. MF > MCl > MBr > MI

C. MI

D. MBr > MI

Answer : Option B
Explaination / Solution:

Smaller is the size of anion less is the polarizing power of anion so greater is the ionic character hence greater will be melting point.

UPSC Civil services Entrance exams General Studies test # General Science Organic Chemistry Some Basic Principles and Techniques Prepare / Learn

Q7. A covalent bond when cleaved heterolytically yields:

A. free radicals

B. carbanions

C. a sextet electronic structured atom with a negative charge

D. carbonium ion

Answer : Option D
Explaination / Solution:

heterolytic cleavage produces carbonium ion and carbanion.

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

Q8. Repeater is used for

A. increasing the signal fidelity

B. extending communication range

C. changing the language of communication

D. limit the frequencies in communication

Answer : Option B
Explaination / Solution:

In telecommunications, a repeater is an electronic device that receives a signal and retransmits it.Repeaters are used to extend transmissions so that the signal can cover longer distances or be received on the other side of an obstruction.