1
Q:

In modern periodic table while going from top to bottom in a group ______.

 

A) size of an atom increases B) size of an atom decreases
C) ionisation energy of an atom increases D)  size and ionisation energy of an atom increases

Answer:   D)  size and ionisation energy of an atom increases



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Subject: Chemistry
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Q:

Which of the following gases is liberated when Sodium Hydrogen Carbonate is heated?

A) Carbon Monoxide B) Carbon Dioxide
C) Oxygen D) Hydrogen
 
Answer & Explanation Answer: B) Carbon Dioxide

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1 725
Q:

Which of the following metals cannot be easily cut with a knife?

A) Sodium B) Aluminium
C) Lithium D) Potassium
 
Answer & Explanation Answer: B) Aluminium

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0 729
Q:

How are elements arranged in the Modern Periodic Table?

A) In the increasing order of their Molecular Mass B) In the increasing order of their Atomic Mass
C) In the increasing order of their Atomic Number D) In the increasing order of their Mass Number
 
Answer & Explanation Answer: B) In the increasing order of their Atomic Mass

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0 594
Q:

Name the noble gas which is placed in the third period and eighth group of the Modern Periodic table.

A) Helium B) Argon
C) Neon D) Krypton
 
Answer & Explanation Answer: B) Argon

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0 770
Q:

The chemical formula of Propane is

A) C3H8 B) C4H10
C) C2H6 D) CH4
 
Answer & Explanation Answer: A) C3H8

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1 785
Q:

What is C12H22O11 also known as

A) Sand B) Sugar
C) Salt D) Clay
 
Answer & Explanation Answer: B) Sugar

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0 655
Q:

Which of the following is the most common kidney stone-forming compound?

A) Calcium oxalate B) Magnesium oxide
C) Sodium bicarbonate D) Magnesium citrate
 
Answer & Explanation Answer: A) Calcium oxalate

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0 654
Q:

Choose the one which is different or odd from the following.

A) Aluminium B) Iron
C) Copper D) Brass
 
Answer & Explanation Answer: D) Brass

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1 791