Questions

Q:

Rank these compounds by boiling point- Pentane, Propane and Hexane.

A) Pentane > Propane > Hexane B) Propane > Pentane > Hexane
C) Hexane > Pentane > Propane D) Propane > Hexane > Pentane
 
Answer & Explanation Answer: C) Hexane > Pentane > Propane

Explanation:

The boiling point of the compounds depend on the number of carbons in them. Hexane has 6, Pentane has 5 and Propane has 3 carbons. As Hexane is with 6 carbons it has highest boiling point and next Pentane with 5 and lowest Propane with 3. 

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Q:

The atoms of the elements having same atomic number but different mass number are called

A) Isobar B) Isotopes
C) Iso electronic D) Isotones
 
Answer & Explanation Answer: B) Isotopes

Explanation:
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Q:

By volume of water, what is the largest lake in Scotland?

Answer

Loch Ness

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Subject: World Geography

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Q:

Iron rusting, chemical or physical change

A) Chemical B) Physical
C) Both A & B D) None of the above
 
Answer & Explanation Answer: A) Chemical

Explanation:

In rusting the Iron ore make a chemical reaction with the oxygen in the presence of water and environmental or atmospheric moisture to produce an Iron oxide. Iron oxide is otherwise called as rust.


The rusting of iron is a chemical change because it is two substances reacting together to make a new substance.

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Q:

Which middle Eastern city founded by Greek settlers in 333 BC was known as 'New Rome' duing the reign of Constantine , the Great?

Answer

Byzantium / Cons-tantinople/ Istanbul

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Q:

Basophils increase in number when parasitic invasion occurs.

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

Explanation:

FALSE. Basophils number will not be increased when parasitic invasion occurs.


 


Basophils are a type of white blood cell. Although they're produced in the bone marrow, they're found in many tissues throughout your body. They're part of your immune system and play a role in its proper function.


 


Basophils appear in many specific kinds of inflammatory reactions, particularly those that cause allergic symptoms. If your basophil level is low, it may be due to a severe allergic reaction.


 


Basophils contain anticoagulant heparin, which prevents blood from clotting too quickly. They also contain the vasodilator histamine, which promotes blood flow to tissues.


 

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Subject: Biology
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Q:

Solely means

A) exclude B) include
C) only D) rival
 
Answer & Explanation Answer: C) only

Explanation:

Solely means only, simply or merely.

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Filed Under: English
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Q:

When is the earth day celebrated

A) 1st January B) 30th April
C) 22nd April D) None of the above
 
Answer & Explanation Answer: C) 22nd April

Explanation:
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