Q:

Name the bird that migrates from the north pole to the south pole and back?

A) Arctic tern	B) Swallow
C) Crane	D) Penguin

Answer & Explanation Answer: A) Arctic tern

Explanation:

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Filed Under: Animals and Birds

186 16559

Q:

A periscope works by the principle of

A) Total internal reflection	B) Refraction
C) Diffraction	D) Reflection & Refraction

Answer & Explanation Answer: A) Total internal reflection

Explanation:

A periscope is an optical instrument that uses a system of prisms, lenses, or mirrors to reflect images through a tube.

per11526634345.jpg image

Light from a distant object strikes the top mirror and is then reflected at an angle of 90 degrees down the periscope tube. At the bottom of the periscope, the light strikes another mirror and is then reflected into the viewer’s eye.

Hence, A periscope works by the principle of Total internal reflection.

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Filed Under: Physics
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38 16544

Q:

The reduction potential of hydrogen half-cell will be negative if :
(1) $P (H_{2})$ = 2 atm and [H+] = 2.0 M
(2) $P (H_{2})$ = 1 atm and [H+] = 2.0 M
(3) $P (H_{2})$ = 1 atm and [H+] = 1.0 M
(4) $P (H_{2})$ = 2 atm and [H+] = 1.0 M

A) Option 1	B) Option 2
C) Option 3	D) Option 4

Answer & Explanation Answer: D) Option 4

Explanation:

$H^{+} - e^{-} \to \frac{1}{2} H_{2}$

Apply Nernst equation

$E = 0 - \frac{0.059}{1} \log (\frac{P H_{2}^{\frac{1}{2}}}{[H^{+}]})$

$E = - \frac{0.059}{1} \log (\frac{2^{\frac{1}{2}}}{1})$

Therefore E is Negative

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Filed Under: Chemistry
Exam Prep: AIEEE

26 16543

Q:

Who among the following persons is called ' Desert Fox '

A) Walter Scott	B) Erwin Rommel
C) Eisenhower	D) Bismarck

Answer & Explanation Answer: B) Erwin Rommel

Explanation:

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Filed Under: Famous Personalities

57 16540

Q:

Who certifies a bill to be a Money bill in india?

A) Finance Minister	B) President
C) Speaker of the Lok Sabha	D) Prime Minister

Answer & Explanation Answer: C) Speaker of the Lok Sabha

Explanation:

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Filed Under: Indian Politics

25 16467

Q:

What goes in the water black and comes out red

Answer

A Lobster is one which goes black in water and comes out red.

lobster1585556605.jpg image

Workspace

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45 16465

Q:

Wild goats and snow leopards are found in

A) Peninsular region	B) Gir forests
C) Himalayan region	D) All the above

Answer & Explanation Answer: C) Himalayan region

Explanation:

Wild goats and snow leopards are found in Himalayan region.

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Filed Under: Animals and Birds
Exam Prep: Bank Exams

12 16457

Q:

Missing letters puzzle

Answer

Answer: V

Explanation: Starting at the top left, and moving anti-clockwise around the figure, letters advance through the alphabet 5 letters at a time.

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