Questions

Q:

Ghoomar is the popular folk dance of

A) Punjab B) Himachal Pradesh
C) Rajasthan D) Jammu and Kashmir
 
Answer & Explanation Answer: C) Rajasthan

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Q:

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select ‘No Error’.

The more obvious feature (1)/ of the modern world is the enormous (2)/ development of Science and Technology. (3)/ No error (4)

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: A) 1

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Q:

What is nature of pH of Milk?

A) Slightly Acidic B) Slightly Basic
C) Highly Acidic D) Highly Basic
 
Answer & Explanation Answer: A) Slightly Acidic

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Q:

Which   one   of   the   following   is   not   a semiconductor?

A) Silicon B) Germanium
C) Quartz D) Gallium arsenide
 
Answer & Explanation Answer: C) Quartz

Explanation:

Semiconductors are the basic materials used in the present solid state electronic devices like diode, transistor, ICs, etc. 2. Lattice structure and the atomic structure of constituent elements decide whether a particular material will be insulator, metal or semiconductor. Semiconductors are elemental (Si, Ge) as well as compound (GaAs, CdS, etc.). Silicon, Germanium, Gallium Arsenide are semiconductors, but Quartz is an insulator.

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Q:

In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.

The fun ____________ reduced significantly when mom decided to tag along.

A) mark B) sign
C) quotient D) moment
 
Answer & Explanation Answer: C) quotient

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Q:

What is the value of [sec θ/(sec θ – 1)] + [sec θ/(sec θ + 1)]

A) 2 sin2 θ B) 2(1 + tan2θ)
C) 2 cosec2 θ D) sin2θ
 
Answer & Explanation Answer: C) 2 cosec2 θ

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Q:

A solid sphere of radius 6 cm is melted and re-casted into a hollow cylinder of uniform thickness. If the external radius of the base of the cylinder is 5 cm and its height is 32 cm, find the uniform thickness of the cylinder ?

A) 3 cm B) 1.5 cm
C) 1 cm D) 2.5 cm
 
Answer & Explanation Answer: C) 1 cm

Explanation:

Let, inner radius of cylinder be ‘x’ cm.
4/3 π(6)3 = π × 32 (52 − x2)

or, (4 × 6 × 6 × 6) / (3 × 32) = 25 − x2 or, x2 = 25 − 9
or, x = 4 cm
Hence, thickness = 5 – 4 = 1 cm.

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Q:

If two successive discounts of 50% and 10% are offered, then what is the net discount (in %)?

A) 50 B) 55
C) 60 D) 65
 
Answer & Explanation Answer: B) 55

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