Questions

Q:

Which of the following is NOT a storage device?

A) Hard Disk B) CD ROM
C) Flash Drive D) Modem
 
Answer & Explanation Answer: D) Modem

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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 fourand indicate it by selecting the appropriate option.

Happy thoughts release hormones that work for our well-being and negative thoughts release hormones that make us ______.

A) ill B) happy
C) excited D) rejuvenated
 
Answer & Explanation Answer: A) ill

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Q:

Trinitrotoluene is

A) used to melt metals B) used to fuse two metals
C) used as an abrasive D) used as an explosive
 
Answer & Explanation Answer: D) used as an explosive

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Q:

Which method will be employed to test the hardness of water?

A) Boiling B) Distillation
C) Formation of lather with soap D) None of these
 
Answer & Explanation Answer: C) Formation of lather with soap

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Q:

____ is the most electropositive and ___ is the most electronegative element of the third period of modern periodic table.

 

A) Sodium, Potassium B) Magnesium, Aluminium
C) Sodium, Chlorine D) Aluminium, Chlorine
 
Answer & Explanation Answer: C) Sodium, Chlorine

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Q:

Prothrombin, responsible for clotting of blood is released by_____.

A) Small Intestine B) Blood Platelets
C) Large Intestine D) Heart
 
Answer & Explanation Answer: B) Blood Platelets

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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 4 * 5 % 3 = 8000 and 2 * 3 % 2 = 36, then 4 * 3 % 3 = ?

A) 432 B) 1728
C) 36 D) 144
 
Answer & Explanation Answer: B) 1728

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