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Q:

Which of the following group is NOT Dobereiner Triads?

 

A) Li, Na, K B) N, P Au
C) Cl, Br, I D) Ca, Sr, Ba

Answer:   B) N, P Au



Explanation:
Subject: Chemistry
Exam Prep: Bank Exams
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The polar ice-caps are made of ____________ water

A) Saline B) Salt
C) Sour D) Fresh
 
Answer & Explanation Answer: D) Fresh

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Which chemical is present in the cells of cork of tree which makes them impervious to gases and water

A) Cellulose B) Suberin
C) Pectin D) Lignin
 
Answer & Explanation Answer: B) Suberin

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Q:

Atomic bomb is based on which of the following principle?

A) Nuclear fusion B) Nuclear fission
C) Natural radioactivity D) All options are correct
 
Answer & Explanation Answer: B) Nuclear fission

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Q:

Isotones have always ______

A) Same number of protons B) Same atomic number
C) Same number of neutron D) Same number of proton and same numbe of neutron
 
Answer & Explanation Answer: C) Same number of neutron

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Q:

The crop that has the highest photosynthetic activity -

A) Sugarcane B) Wheat
C) Cotton D) Rice
 
Answer & Explanation Answer: A) Sugarcane

Explanation:

Corn, sugar cane, and sorghum are C4 plants. These plants are economically important in part because of their relatively high photosynthetic efficiencies compared to many other crops.

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Q:

Steel contains

A) no carbon B) < 2% of carbon
C) > 10% of carbon D) > 29% of carbon
 
Answer & Explanation Answer: B) < 2% of carbon

Explanation:

To make steel, iron ore is first mined from the ground. It is then smelted in blast furnaces where the impurities are removed and carbon is added.

In simple, steel is iron alloyed with carbon, usually 0 - 2%.

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Q:

Which is the only gem of world made of a single element?

A) Platinum B) Diamond
C) Emerald D) Ruby
 
Answer & Explanation Answer: B) Diamond

Explanation:

The only gem of world made of a single element is Diamond.

the_only_gem_of_world_made_of_a_single_element1563602197.jpg image

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Q:

Which of the following is also known as Carbolic Acid?

A) Hydroxide B) Sulphuric Acid
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Answer & Explanation Answer: D) Phenol

Explanation:

Phenol with a molecular formula [C6H5OH] is also called as Carbolic Acid. It is a white poisonous clear compound with sweet smell. It is used in making plastics, detergents and drugs.

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