Questions

Q:

Atoms have no electric charge because they

A) have same number of electrons and neutrons B) have same number of electrons and protons
C) have same number of protons and neutrons D) have same number of protons, electrons and neutrons
 
Answer & Explanation Answer: B) have same number of electrons and protons

Explanation:

Atoms are composed of three main particles called electrons, protons and neutrons. We know that, the electrons are negatively charged particles whereas protons are positively charged and neutrons have no charge.

 

Hence, as the number of electrons and protons are equal and they are oppositely charged, the atom will have no charge as their charges cancel each other.

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Q:

Which of the following equals one atomic mass unit?

A) one-twelfth the mass of one carbon-12 atom B) the mass of one electron
C) one-sixth the mass of one helium-4 atom D) the mass of one carbon-12 atom
 
Answer & Explanation Answer: A) one-twelfth the mass of one carbon-12 atom

Explanation:

One atomic mass unit (AMU) is equal to the one-twelfth the mass of one carbon-12 atom.

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Q:

Which gas is a source of natural groundwater pollution?

A) Helium B) Krypton
C) Radon D) Argon
 
Answer & Explanation Answer: C) Radon

Explanation:

Radon gas is a source of natural groundwater pollution.

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Q:

Glycolysis is the conversion of

A) Glucose to pyruvate B) Glucose to proteins
C) Pyruvate to glucose D) All of the above
 
Answer & Explanation Answer: A) Glucose to pyruvate

Explanation:

Glycolysis is the metabolic process of converting 1 molecule of glucose to 2 molecules of pyruvate through a series of 10 enzyme catalyzed reactions.

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Q:

What is wide-mouth frog?

Answer

Wide-mouth frog is the simplest known key distribution center (KDC) authentication protocol

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Subject: Networking
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Q:

What was the city of Timbuktu best known for?

A) Trade B) Gold
C) Diamonds D) Tea
 
Answer & Explanation Answer: A) Trade

Explanation:

The great Sahara Desert created an opportunity for wealth by trading to peoples who live in and around the region. The city of Timbuktu was built as a result of this trade.

 

Hundreds of years ago, salt was a very valuable commodity. It was valued for its taste as well as its ability to preserve food. One of the most productive areas for producing salt was the Sahara Desert, and the city of Timbuktu was built to capitalize upon this trade.

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Q:

The first attempt in printing was made in England by

A) James Watt B) Isaac Newton
C) William Caxton D) James Arkwright
 
Answer & Explanation Answer: C) William Caxton

Explanation:

The first attempt in printing was made in England by William Caxton.

 

The_first_attempt_in_printing_was_made_in_England_by1552110131.jpg image

 

William Caxton was an English merchant, diplomat, and writer. He is thought to be the first person to introduce a printing press into England, in 1476, and as a printer was the first English retailer of printed books.

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Q:

What was the unique about the way in which these three Indian states slipped into British hands - Satara in 1848, Jhansi in 1853 and Nagpur in 1854?

Answer

Because of the Doctrine of Lapse; if Hindu rulers did not have direct natural heirs, the British would impose their rule.

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Subject: World History

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