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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



Explanation:
Subject: Chemistry
Exam Prep: Bank Exams
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A bond formed by the transfer of electrons betwwen atoms of the elements is called

A) ionic bond B) covalent bond
C) co ordinate bond D) none
 
Answer & Explanation Answer: A) ionic bond

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8 5037
Q:

Formation of anions occurs by

A) loss of neutrons B) gain of protons
C) gain of electrons D) none
 
Answer & Explanation Answer: C) gain of electrons

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6 5729
Q:

Formation of cation occurs by

A) gain of electron B) loss of electron
C) gain of proton D) loss of proton
 
Answer & Explanation Answer: B) loss of electron

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14 6769
Q:

A particle which is four times in mass and two times in charge that of proton is

A) helium atom B) an alpha particle
C) deuteron D) tritium
 
Answer & Explanation Answer: B) an alpha particle

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7 4099
Q:

A Radioactive subatance emits

A) alpha particles B) beta particle
C) gamma particle D) all of the three
 
Answer & Explanation Answer: D) all of the three

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4 3598
Q:

The alpha-particles are

A) high energy electrons B) positively charged hydrogen irons
C) high energy x ray radiations D) double positively charged helium nuclei
 
Answer & Explanation Answer: D) double positively charged helium nuclei

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6 5340
Q:

The activity of rradioisotope change with

A) temperature B) pressure
C) chemical environment D) None of these
 
Answer & Explanation Answer: D) None of these

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6 5148
Q:

Natural radioactivity was discovered by

A) Rutherford B) Becquerel
C) Curie D) Schmidt
 
Answer & Explanation Answer: B) Becquerel

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14 6291