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Q:

Hydrogen bomb is based on the principle of  

A) nuclear fission B) nuclear fusion
C) natural radioactivity D) artificial radioactivity

Answer:   B) nuclear fusion



Explanation:

Hydrogen Bomb is based on the principle of Nuclear Fusion.

Hydrogen_bomb_is_based_on_the_principle_of1552385714.jpg image

 

  • Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles.

 

  • The difference in mass between the reactants and products is manifested as either the release or absorption of energy.
Subject: Chemistry
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Q:

Rayon is chemically

A) Glucose B) Amylase
C) Cellulose D) Pectin
 
Answer & Explanation Answer: C) Cellulose

Explanation:

Rayon is a versatile fiber. Rayon is chemically Cellulose. It is widely claimed to have the same comfort properties as natural fibers, although the drape and slipperiness of rayon textiles are often more like nylon. It can imitate the feel and texture of silk, wool, cotton and linen. The fibers are easily dyed in a wide range of colors.

Rayon_is_chemically1561456278.jpg image

 

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0 17
Q:

Which among the following minerals is also known as Horn Silver?

A) Silver Chroride B) Zinc Phosphate
C) Silver Iodide D) Silver Sulphide
 
Answer & Explanation Answer: A) Silver Chroride

Explanation:

Silver chloride is a chemical compound with the chemical formula AgCl is also called as Horn Silver. It is also called as cerargyrite. It is a gray, very heavy halide mineral and an ore of silver.

Which_among_the_following_minerals_is_also_known_as_Horn_Silver1560942904.jpg image

 

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0 91
Q:

Which of the following is not a type of chemical weathering?

A) Corrosion B) Solution
C) Oxidation D) Carbonation
 
Answer & Explanation Answer: A) Corrosion

Explanation:

Chemical weathering is the process of altering rocks chemically when they are broken down. It includes hydrolysis, oxidation, acid rain, etc...

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1 110
Q:

The hazardous component in most antifreeze is

A) Ethane alcohol B) Ethylene Glycol
C) Ehtylene D) Ethene
 
Answer & Explanation Answer: B) Ethylene Glycol

Explanation:

Ethylene Glycol is an antifreeze is an additive which lowers the freezing point of a water-based liquid and increases its boiling point. 

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0 92
Q:

Choose the pure substance from the list below.

 

A) Sugar B) Lemonade
C) Air D) Sea water
 
Answer & Explanation Answer: A) Sugar

Explanation:
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1 41
Q:

Dry distillation of calcium formate gives

A) HCOOH B) CH3COOH
C) HCHO D) CH3CHO
 
Answer & Explanation Answer: C) HCHO

Explanation:

Dry distillation of calcium acetate and calcium formate leads to the formation of aldehydes and ketones.

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0 103
Q:

Which of these rules are applicable for naming covalent compounds?

A) nonmetal name + nonmetal name + suffix –ide B) nonmetal name + nonmetal name + suffix –ite
C) metal name + nonmetal name + suffix –ide D) metal name + nonmetal name + suffix –ite
 
Answer & Explanation Answer: C) metal name + nonmetal name + suffix –ide

Explanation:

Simple covalent compounds are generally named by using prefixes metal name + nonmetal name + suffix –ide to indicate how many atoms of each element are shown in the formula. Also, the ending of the last (most negative) element is changed to -ide. The prefixes used are mono-, di-, tri-, tetra-, penta-, hexa-, and so forth.

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0 110
Q:

Energy transfer by convection is primarily restricted to

A) fluids B) solids
C) liquids D) gases
 
Answer & Explanation Answer: A) fluids

Explanation:

Convection is the mode of heat transfer which involves bulk motion of a fluid to transfer heat. Energy transfer by convection is primarily restricted to fluids. Fluids can be both liquids and gases.

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