Questions

Q:

Which one of the following is the correct relation between the Kelvin temperature (T) and the Celsius temperature (fc)?

A) These are two independent temperature scales B) T = tc
C) T = tc - 273.15  D) T = tc + 273.15 
 
Answer & Explanation Answer: D) T = tc + 273.15 

Explanation:

Lord Kelvin, working in Scotland, developed the Kelvin scale in 1848. His scale uses molecular energy to define the extremes of hot and cold. Absolute zero, or 0 K, corresponds to the point at which molecular energy is at a minimum. The Kelvin scale is preferred in scientific work, although the Celsius scale is also commonly used. Temperatures measured on the Kelvin scale are reported simply as K, not °K.

T (in °C) + 273.15 = T (in K)

T (in K) − 273.15 = T (in °C)

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Filed Under: Chemistry
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0 1851
Q:

In which of the following animals is can breathe through their skin?

A) Frog B) Shark
C) Whale D) Cockroach
 
Answer & Explanation Answer: A) Frog

Explanation:
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Filed Under: General Science
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4 1851
Q:

Which among the following is a vector quantity?

A) Heat B) Angular momentum
C) Work D) Time
 
Answer & Explanation Answer: B) Angular momentum

Explanation:
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Filed Under: Physics
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0 1851
Q:

Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.

We set out for the gallows. Two warders marched on either side of the prisoner, with their rifles at the slope; two others marched close against him, gripping him by his arm and shoulder, as though, at once pushing and supporting him. The rest of us, magistrates and the like, followed behind. Suddenly, when we had gone ten yards, the procession stopped short without any order or warning. A dreadful thing had happened ­ a dog, come goodness knows whence, had appeared in the yard. It came bounding among us with a loud volley of barks, and leapt round us wagging its whole body, wild with glee at finding so many human beings together. It was a large woolly dog, half Airedale, half Pariah. For a moment, it pranced round us, and then, before anyone could stop it, it had made a dash for the prisoner, and jumping up tried to lick his face. Everyone stood aghast, too taken aback even to grab at the dog.

What was surprising about the actions of the dog?

A) It ran up and down the path B) It bit the guards
C) It barked at the magistrates D) It licked the prisoner's face
 
Answer & Explanation Answer: D) It licked the prisoner's face

Explanation:
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Filed Under: English
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0 1851
Q:

Improve the bracketed part of the sentence.
Would it be impolite (to be asked) why they are leaving?

A) to ask B) for asking
C) for being asked D) no improvement
 
Answer & Explanation Answer: A) to ask

Explanation:
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Filed Under: English
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Q:

In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.

A person who talks too much of himself.

A) Egoist B) Elite
C) Emetic D) Egotist
 
Answer & Explanation Answer: D) Egotist

Explanation:
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Filed Under: English

0 1850
Q:

Which of the following is present in a prokaryotic cell?

A) chloroplast B) nucleoid
C) mitochondrion D) nuclear envelope
 
Answer & Explanation Answer: B) nucleoid

Explanation:
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Filed Under: Biology
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3 1850
Q:

A  photon  of  X-ray  has  energy  of  1  keV.  A photon of visible radiation has energy of 3 eV.  In  this  context,  which  one  of  the following statements is not correct?

A) The wavelength of X-ray photon is less than the wavelength of visible radiation photon. B) Both    the    photons    have    different energies.
C) The  speeds  of  both  the  photons  in vacuum are different D) The   frequency   of   X-ray   photon   is higher  than  the  frequency  of  visible radiation photon.
 
Answer & Explanation Answer: C) The  speeds  of  both  the  photons  in vacuum are different

Explanation:

The speed of all the electromagnetic radiation are always   same   and   equal   to   the numerical value 3 x 10^8m/sec.

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Filed Under: Physics
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0 1850