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Q:

Oxidation Number of 'S' in H2SO4?

A) +6 B) +2
C) -6 D) -2
 
Answer & Explanation Answer: A) +6

Explanation:

In H2SO4,

Hydrogen has a charge of +2, with each hydrogen has +1.

Oxygen has  a charge of -8, with each oxugen has -2.

Total charge = (2 - 8) = -6

Therefore, the Oxidation number of Sulphur S is '+6' because to make the compound stable.

 

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Filed Under: Chemistry
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Q:

The Capital of Tanzania is 

A) Nairobi B) Lusaka
C) Kampala D) Dar- es- Salaam
 
Answer & Explanation Answer: D) Dar- es- Salaam

Explanation:
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Filed Under: Country Capitals

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Q:

What is dual-mode operation?

Answer

In order to protect the operating systems and the system programs from the malfunctioning programs the two mode operations were evolved


System mode


User mode

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Subject: Operating Systems

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Q:

Which city is located on the banks of the river Mula-Mutha?

A) Pune B) Nagpur
C) Ahmedabad D) Surat
 
Answer & Explanation Answer: A) Pune

Explanation:

The Mula-Mutha is a river in India, formed by the confluence of the Mula and Mutha rivers in the city of Pune, which later meets the Bhima River, which itself later meets the Krishna River and finally emptying to the Bay of Bengal.

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Filed Under: Indian Geography
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Q:

The movement of water molecules through the plasma membrane is called ______.

 

A) Osmosis B) Sedimentation
C) Precipitation D) Transpiration
 
Answer & Explanation Answer: A) Osmosis

Explanation:
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Filed Under: Chemistry
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Q:

What is seismic zone extending at an angle of about 45 degrees from the base of an ocean trench, down through lithosphere to the asthenosphere known as

A) Appleton layer B) Benioff zone
C) Conard discontinuity D) Convergence zone
 
Answer & Explanation Answer: B) Benioff zone

Explanation:
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Filed Under: World Geography

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Q:

Rate of doing work is called

A) Capacity B) Energy
C) Power D) Current
 
Answer & Explanation Answer: C) Power

Explanation:

The Rate of doing work or rate of transfer of energy is called Power.

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Filed Under: Physics
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Q:

Which of the following is true of a scientific theory?

A) It is only accepted after the person who came up with it has died. B) It is a method or device that applies scientific knowledge for some specific purpose.
C) It generates testable hypotheses, is supported by a large body of evidence, and is broad in scope. D) It must demonstrate the effect of one variable by testing control groups and experimental groups.
 
Answer & Explanation Answer: C) It generates testable hypotheses, is supported by a large body of evidence, and is broad in scope.

Explanation:

A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world. Scientific theories are not ever proved in the sense of being proved to be 100% correct.

 

Examples of some scientific theories are ::

Evolution, gravity, atomic theory, the germ theory of disease, relativity, quantum theory, electromagnetic theory, layered Earth theory, etc...

 

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Filed Under: General Science
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