Questions

Q:

Metals are good conductors of electricity because

A) The atoms are lightly packed B) They contain free electrons
C) They have high melting point D) All the above
 
Answer & Explanation Answer: B) They contain free electrons

Explanation:

Metal particles are held together by strong metallic bonds, which is why they have high melting and boiling points. The free electrons in metals can move through the metal, allowing metals to conduct electricity.

Because the electrons in the atom's higher energy levels can separate from the atoms easily, they can be pulled out with very little energy. Because the molecular structure of the metal is such that 'free electrons' are free to move, thus being categorized as electrically conductive.

 

For example, copper is used for electrical wiring because it is a good conductor of electricity.

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Q:

Which results in an increase in power?

A) doing more work in less time. B) doing less work in more time.
C) doing less work in less time. D) doing more work in more time.
 
Answer & Explanation Answer: A) doing more work in less time.

Explanation:

Doing more work in less time, results in an increase in power to do a work.

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Q:

A 16th Century Indian Jurist has stated that 'land is the property of its owner, and kings have only the right to tax it'. His Name?

A) Yajnavalkya B) Nilakantha
C) Hemadri D) Vijnaneswara
 
Answer & Explanation Answer: B) Nilakantha

Explanation:
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Q:

Who became the first Asian women to sail around the world ?

A) Golda Meir B) Ujwala Patil
C) Cleopatra D) Sirimavo Bandaranaike
 
Answer & Explanation Answer: B) Ujwala Patil

Explanation:
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Q:

c with a line over it symbol means

A) with B) without
C) and D) or
 
Answer & Explanation Answer: A) with

Explanation:

The letter “c” with a line over it is a medical abbreviation often used by doctors, nurses, and other medical professionals. The symbol looks like this: c̄. The c is almost always lower-case.

This symbol actually has a very simple meaning. A c with a line over it just means “with”. This abbreviation is often used on patient charts and prescriptions, as well as information or notes written by medical professionals.

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Q:

Which statement about electrons and atomic orbitals is NOT true?

A) An orbital can contain a minimum of two electrons B) An electron has the same amount of energy in all orbitals
C) An atom’s lowest energy level has only two orbitals D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Yes, all the given statements are NOT true about electrons and atomic orbitals.

 

True statements are ::

 

An orbital can contain a maximum of two electrons.

An atom’s lowest energy level has only one orbital.

An electron has different amount of energies in all orbitals.

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Q:

The Simon commission visited India in the year?

A) 1933 B) 1939
C) 1921 D) 1927
 
Answer & Explanation Answer: D) 1927

Explanation:

The British government appointed a commission under the chairmanship of Sir John Simon to report on India's constitutional progress for introducing constitutional reforms as had been promised in 1927.

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Q:

What is the structural unit of compact bone?

A) Osteon B) Spongy bone
C) Lamellae D) Periosteum
 
Answer & Explanation Answer: A) Osteon

Explanation:

what_is_the_structural_unit_of_compact_bone1536568861.jpg image

 

The structural unit of compact bone is Osteons or Haverisan systems.

 

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