3
Q:

Which of the following group is NOT Dobereiner Triads?

 

A) Li, Na, K B) N, P Au
C) Cl, Br, I D) Ca, Sr, Ba

Answer:   B) N, P Au



Explanation:
Subject: Chemistry
Exam Prep: Bank Exams
Q:

The atoms of the elements which have same number of neutrons are called

A) Isobars B) Isotopes
C) Isotones D) None
 
Answer & Explanation Answer: C) Isotones

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4 2767
Q:

Species containing same number of electrons are called

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

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24 8694
Q:

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

A) Isotopes B) Isobars
C) Isotones D) Isomers
 
Answer & Explanation Answer: B) Isobars

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6 4301
Q:

Which one is not the isotopes of hydrogen

A) Protium B) Deuter
C) Tritium D) All
 
Answer & Explanation Answer: C) Tritium

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2 2815
Q:

In isotopes the number of neutrons are

A) same B) different
C) both D) none
 
Answer & Explanation Answer: B) different

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3 3862
Q:

Which one of the following elements is essential for construction is nuclear reactors

A) Cobalt B) Nickel
C) Zirconium D) Tungsten
 
Answer & Explanation Answer: C) Zirconium

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59 15482
Q:

Which one of the following is not radioactive

A) Astanine B) Francium
C) Tritium D) Zirconium
 
Answer & Explanation Answer: D) Zirconium

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13 7014
Q:

A radioactive substance has a half life of four months, three-fourth of the substance would decay in

A) 3 months B) 4 months
C) 8 months D) 12 months
 
Answer & Explanation Answer: C) 8 months

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80 14174