Questions

Q:

Foliated rocks are distinguished by

A) layers B) minerals
C) colors D) names
 
Answer & Explanation Answer: A) layers

Explanation:

Foliated rocks are distinguished by layers.

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Q:

Ticks and mites are actually

A) Arachnids B) Insects
C) Myriapods D) Crustaceans
 
Answer & Explanation Answer: A) Arachnids

Explanation:
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Q:

Which of the following can be a cause of fratricide?

A) Clearance of Fires Error B) Fatal Navigation Error
C) Failures in the direct fire control plan D) All of the above
 
Answer & Explanation Answer: C) Failures in the direct fire control plan

Explanation:

Fratricide means the accidental killing of one's own forces in war.

 

Failures in the direct fire control plan can lead to be a cause of fratricide.

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Q:

Which event occurs during interphase?

A) Centrioles appear B) Spindle fibers begin to form
C) The cell grows D) Centromeres divide
 
Answer & Explanation Answer: C) The cell grows

Explanation:

The cell carries out the metabolic processes and it grows during interphase.

The cell cycle has three phases that must occur before mitosis, or cell division happens. These three phases are collectively known as interphase. They are G1, S, and G2.

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Q:

Which of the following reactions are redox reactions?

A) Ba(s)+Cl2(g)--->BaCl2(s) B) Mg(s)+Br2(l)--->MgBr2(s)
C) Al(s)+3Ag^+(aq)--->Al^3+(aq)+3Ag(s) D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

A redox reaction is a type of reaction which involves transfer of electrons among two species. This reaction is also called oxidation-reduction reaction.

In oxidation process, there is an increase in oxidation state of an atom, ion or molecule by losing the electrons.

In reduction process, there is a decrease in oxidation state of an atom, ion or molecule by accepting the electrons.

1)

image

In this reaction, Ba undergoes oxidation and Cl undergoes reduction.
This reaction is redox reaction.
In this reaction, oxidation number of Ba increases from 0 to +2 . So, Ba undergoes oxidation. The oxidation number of Cl decreases from 0 to -1. So, Cl undergoes reduction.

 

2) 

 

image

From this above reaction, it is clear that Aluminum undergoes oxidation and silver undergoes reduction.
Due to this, this reaction is redox reaction.

In this reaction, oxidation number of Aluminum increases from 0 to +1. So, aluminum undergoes oxidation. The oxidation number of silver decreases from +1 to 0. So, silver undergoes reduction.

 

3)


image

In this reaction, Mg undergoes oxidation and Br undergoes reduction.
This reaction is redox reaction.
The reactions 1, 3 and 4 are redox reactions.
In this reaction, oxidation number of Mg increases from 0 to +2 . So, Mg undergoes oxidation. The oxidation number of Br decreases from 0 to -1 . So, Br undergoes reduction.

 

Hence all the above reactions are redox reactions.

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Q:

Who was the revolutionary leader who ended his days as a Swami of Ramakrishna Mission ?

A) Ajit Singh B) Aurobindo Ghosh
C) Jatindranath Bandopadhyay D) Hemachandra Kanungo
 
Answer & Explanation Answer: C) Jatindranath Bandopadhyay

Explanation:
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Q:

How do we now Know the company founded as the Battlecreek Toasted Cornflake Company in 1906?

Answer

Kellogg's

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Q:

The right ventricle transports oxygenated blood to the lungs.

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

The right ventricle transports deoxygenated blood to the lungs, where the oxygenation takes place.


Hence, the given statement is FALSE.

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