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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



Explanation:
Subject: Chemistry
Exam Prep: Bank Exams
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Answer & Explanation Answer: D) reactions with oxygen

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In which of the following solution the concentration of H+ ion is the maximum?

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Answer & Explanation Answer: A) 12 gm

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Which of the following is NOT correctly matched?

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Answer & Explanation Answer: A) Sandstone - conglomerate  

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All phosphorus atoms have the same

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Answer & Explanation Answer: C) Atomic number

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Baking soda is used ______.

 

I. for making baking powder

II. in soda-acid fire extinguishers

III. to neutralize excess acid in the stomach

 

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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Which of the following is NOT a nucleon?

A) Proton B) Electron
C) Neutron D) No option is correct
 
Answer & Explanation Answer: B) Electron

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Q:

Which of the following represents an ion?

A) a particle having 9 protons, 9 neutrons, and 10 electrons B) a particle having 19 protons, 21 neutrons, and 19 electrons
C) a particle having 14 protons, 14 neutrons, and 14 electrons D) a particle having 1 proton, 3 neutrons, and 1 electron
 
Answer & Explanation Answer: A) a particle having 9 protons, 9 neutrons, and 10 electrons

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