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Q:

Which of the following is a Decomposition Reaction?

A) 2HgO ----> 2Hg + O2 B) 6NaNO3 ----> 6NaNO2 + 3O2
C) ZnCO3 ----> ZnO + CO2 D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

All the given reactions are Decomposition reactions.

Decomposition reaction is a reaction in which only one reactant is splitted into two or more products.

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Filed Under: Chemistry
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Q:

Which of the following year is considered as the first year of the Muslim calender ? 

A) AD 622 B) AD 671
C) AD 571 D) AD 651
 
Answer & Explanation Answer: A) AD 622

Explanation:

Muhammad had to leave Mecca his birth place where he started preaching and take refuse in Medina, where he was given a warm welcome. This event took place in AD 622 and is known as the year of the Hijira, or migration, which became the first year of the Muslim Calendar.

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Filed Under: World History

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Q:

Thermoplastic materials are those materials which

A) Do not become hard with the application of heat and pressure and no chemical change occurs B) Are flexible and can withstand considerable wear under suitable conditions
C) Are formed into shape under heat and pressure and results in a permanently hard product D) Are used as a friction lining for clutches and brakes
 
Answer & Explanation Answer: A) Do not become hard with the application of heat and pressure and no chemical change occurs

Explanation:

Thermoplastic materials is a type of plastic material that can be cooled and heated several times without any change in their chemistry or mechanical properties.

 

Examples of Thermoplastic ::

 

  • polyethylene,
  • polypropylene,
  • polyvinyl chloride,
  • polystyrene,
  • polybenzimidazole,
  • acrylic,
  • nylon and
  • teflon
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Filed Under: Physics
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Q:

Which country's Parliament became first in the world to run fully on solar energy  ?

A) Japan B) Pakistan
C) China D) Myanmar
 
Answer & Explanation Answer: B) Pakistan

Explanation:
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Filed Under: General Awareness
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Q:

An Oxe-bow lake is a ______

A) lake formed behind an off-shore bar B) lake occupying a volcanic crater
C) lake formed due to cut off meander D) lake occupying a hollow scooped by a glaqcier
 
Answer & Explanation Answer: C) lake formed due to cut off meander

Explanation:
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Filed Under: World Geography

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Q:

The only couple to win the Nobel Prize were the

A) Ruther Fords B) Curies
C) Davies D) Millikans
 
Answer & Explanation Answer: B) Curies

Explanation:
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Filed Under: Honours and Awards

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Q:

Between which one of the following pairs of Islands in DuncanPassage located?

A) South Andaman and Little Andaman B) Little Andaman and Car Nicobar Island
C) Car Nicobar Island and Little Nicobar Island D) Little Nicobar Island and Great Nicobar Island
 
Answer & Explanation Answer: A) South Andaman and Little Andaman

Explanation:
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Filed Under: Indian Geography

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Q:

Shock resisting steels should have

A) toughness B) low wear resistance
C) low tensile strength D) low hardness
 
Answer & Explanation Answer: A) toughness

Explanation:

Shock resisting steels should have toughness.

S-5 is a silico-manganese shock resisting steel that offers good ductility.

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Filed Under: Chemistry
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