Questions

Q:

Earth's crust mainly contains ______.

A) bauxite B) manganese
C) silica D) iron
 
Answer & Explanation Answer: C) silica

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Filed Under: Chemistry
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Q:

The cell walls of many organisms of Fungi kingdom are made of a tough complex sugar called ______.

A) Pectin B) Suberin
C) Cellulose D) Chitin
 
Answer & Explanation Answer: D) Chitin

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Filed Under: Biology
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Q:

The exchange of materials between blood and interstitial fluid occurs only at the _____.

A) Veins B) Capillaries
C) Arteries D) Arterioles
 
Answer & Explanation Answer: B) Capillaries

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Filed Under: General Science
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Q:

Who among the following is the current Lokayuktha of Delhi?

A) Justice Manmohan Sarin B) Justice Reva Khetrapal
C) Justice Mohd. Shamim D) Justice Rajendra Nath Aggarwal
 
Answer & Explanation Answer: B) Justice Reva Khetrapal

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Filed Under: Indian Politics

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Q:

Acceleration due to gravity on a planet decreases with ______.

A) decrease in radius of the planet B) increase in mass of the planet
C) decrease in mass of the body D) increase in altitude from surface of the planet
 
Answer & Explanation Answer: D) increase in altitude from surface of the planet

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Filed Under: Physics
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Q:

A formal language used to express information or knowledge, often for use in computer system design is?

A) Command Language B) Machine Language
C) Markup Language D) Modeling language
 
Answer & Explanation Answer: D) Modeling language

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Filed Under: Computer
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Q:

Sher Khan defeated _________ at Chausa (1539) and Kanauj (1540), forcing him to flee to Iran.

A) Aurangzeb B) Humayun
C) Muhammad Azam Shah D) Bahadur Shah I
 
Answer & Explanation Answer: B) Humayun

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Filed Under: Indian History
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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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