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 Chemistry Questions

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Q:

Metals are generally ______.

I. Ductile

II. Malleable

III. Poor conductors of heat

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: A) Only I and II

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1 32429
Q:

Which species is a conjugate acid of OH- ?

 

A) H+ B) O2- 
C) OH D) H2O
 
Answer & Explanation Answer: D) H2O

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4 32005
Q:

The vast amount of sea weeds present in oceans may produce an endless source of

 

A) Methane B) Ocean thermal energy
C) Sea wave energy D) Nuclear energy
 
Answer & Explanation Answer: A) Methane

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1 31962
Q:

Find the similarity in the following :

 

Carbon, Silicon, Boron, Arsenic

 

A) All of them are gases B) All of them are non-metals
C) All of them are metals D) No similarity
 
Answer & Explanation Answer: B) All of them are non-metals

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0 31902
Q:

An electron loses potential energy when it

 

A) shifts to a more electronegative atom. B) increases its kinetic energy.
C) shifts to a less electronegative atom. D) increases its activity as an oxidizing agent.
 
Answer & Explanation Answer: A) shifts to a more electronegative atom.

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1 31825
Q:

Group 8A of the periodic table contains the

 

A) least reactive metals B) most reactive nonmetals
C) most reactive metals D) least reactive nonmetals
 
Answer & Explanation Answer: D) least reactive nonmetals

Explanation:

Helium (He), Neon(Ne), Argon(Ar), Krypton (Kr), Xenon (Xe), Radon (Rn) and Ununoctium (Uuo) are present group 8A.

 

They have fully filled orbitals and hence are most stable amongst all the elements in the periodic table and are considered as least reactive least reactive non-metals.

 

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1 31809
Q:

____ are atoms/molecules/ions containing the same number of electrons.

 

A) Isotones B) Isotopes
C) Isoelectronic D) Valence Isoelectronic  
 
Answer & Explanation Answer: C) Isoelectronic

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1 31646
Q:

Valency of an element depends on which of the following?

I. Number of losing electron

II. Number of gaining electron

III. Number of sharing electron

 

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: D) All I, II and III

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