Questions

Q:

In case of a standard hydrogen electrode

A) absolute electrode potential is not zero B) absolute electrode potential is zero
C) both absolute and standard electrode potential values are zero D) electrode potential is zero only at 25 deg C
 
Answer & Explanation Answer: A) absolute electrode potential is not zero

Explanation:

The Standard hydrogen electrode (abbreviated SHE), is a redox electrode which forms the basis of the thermodynamic scale of oxidation-reduction potentials. Its absolute electrode potential is estimated to be 4.44 ± 0.02 V at 25 °C, but to form a basis for comparison with all other electrode reactions, hydrogen's standard electrode potential (E0) is declared to be zero volts only at 298.

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Q:

Centrifugal force increases with

A) Temperature B) Pressure
C) Acceleration D) Humidity
 
Answer & Explanation Answer: C) Acceleration

Explanation:

Centrifugal force is the fictitious force that pulls out from the center on the body we feel while moving in the circular path. It increases with the rate of rotation of the axis i.e, acceleration of the body.

 

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Q:

Speed of light is maximum in _____.

A) vacuum B) solids
C) liquids D) gases
 
Answer & Explanation Answer: A) vacuum

Explanation:
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Q:

Upward force on a floating body is called _______.

A) jerk B) buoyancy
C) Archimedal force D) Anti-gravity
 
Answer & Explanation Answer: B) buoyancy

Explanation:
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Q:

Which statement best characterizes animism?

A) It's the basis of social status within a tribe. B) It combines natural, human, and spiritual forces.
C) It's a religion that maintains the futility of human existence. D) It's composed of irrational superstitions that arise in underdeveloped rural communities.
 
Answer & Explanation Answer: B) It combines natural, human, and spiritual forces.

Explanation:
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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.

The first working steam­ powered vehicle was designed and most likely built by Ferdinand Verbies, a Flemish member of a Jesuit mission in China around 1672. It was a 65 cm long scale­ model toy for the Chinese Emperor, that was unable to carry a driver or a passenger. It is not known if Verbiest's model was ever built. Nicolas- Joseph Cugnot is widely credited with building the first full­ scale, self ­propelled mechanical vehicle or automobile in about 1769; he also created a steam­ powered tricycle. He constructed two steam tractors for the French Army, one of which is preserved in the French National Conservatory of Arts and Crafts. His inventions were however handicapped by problems of water supply and maintaining steam pressure. In 1801, Richard Trevithick built and demonstrated his Puffing Devil road locomotive, believed by many to be the first demonstration of a steam ­powered road vehicle. It was unable to maintain sufficient steam pressure for long periods. Sentiment against steam ­powered road vehicles led to the Locomotive Acts of 1865. In 1807 Nicephore Niepce and his brother Claude probably created the world's first internal combustion engine which they called Pyreolophore.

Cugnot built steam tractors for:

A) The Chinese Emperor B) The French Army
C) The Jesuit mission D) The French Conservatory
 
Answer & Explanation Answer: B) The French Army

Explanation:
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Q:

In the following question, out of the four alternatives, select the word opposite in meaning to the word given.
Phlegmatic

A) Ardent B) Indifferent
C) Prohibit D) Merciless
 
Answer & Explanation Answer: A) Ardent

Explanation:
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Q:

In the following question, a sentence has been given in Direct/Indirect speech. Out of the four alternatives suggested, select the one which best expresses the same sentence in Indirect/Direct speech.

 

The driver said, "I have been waiting here at the airport since two hours for my master."

A) The driver said that he had been waiting there at the airport since two hours for his master. B) The driver said that he had been waiting here at the airport since two hours for his master.
C) The driver said that he has been waiting there at the airport since two hours for his master. D) The driver said that he has been waiting here at the airport since two hours for his master.
 
Answer & Explanation Answer: A) The driver said that he had been waiting there at the airport since two hours for his master.

Explanation:
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