1 ) Atomic radii . . . . . . . . . . . . . . . of periodic table .
A ) increases from left to right and decreases from top to down ,
B ) decreases from left to right and increases from top to down ,
C ) increases from left to right and increases from top to down ,
D ) None of these ,
Correct Answer : - B ) decreases from left to right and increases from top to down ,
2 ) Total . . . . . . . . . groups in modern periodic table .
A ) 14 , B ) 18 ,
C ) 16 D ) None of these ,
Correct Answer : - B ) 18 ,
3 ) Difference in density is the basis of gravity separation .
4 ) The no. of electrons in valence shell of element reflects . . . . . . . . . . . ,
A ) period number , B ) group number ,
C ) both of these , D ) None of these ,
Correct Answer : - B ) group number ,
5 ) In 5th period , there are . . . . . . . . . elements .
A ) 12 , B ) 18 ,
C ) 16 , D ) None of these ,
Correct Answer : - B ) 18 ,
6 ) Ionization energy . . . . . . . . . . . . . of periodic table .
A ) increases from left to right and decreases from top to down ,
B ) decreases from left to right and increases from top to down ,
C ) increases from left to right and increases from top to down ,
D ) None of these ,
Correct Answer : - A ) increases from left to right and decreases from top to down ,
Ionization energy : - The energy required to reduce / remove an electron from valence shell of an atom .
7 ) Electronegativity . . . . . . . . . . . . . . . periodic table .
A ) increases from left to right and decreases from top to down ,
B ) decreases from left to right and increases from top to down ,
C ) increases from left to right and increases from top to down ,
D ) None of these ,
Correct Answer : - A ) increases from left to right and decreases from top to down ,
Electronegativity : - The force that attracts electron towards itself .
8 ) " 4F " electronic sub - shell in Lanthanides is incompletely filled .
9 ) Number of elements in 4th period is . . . . . . . . . . . . ,
A ) 14 , B ) 18 ,
C ) 16 D ) None of these ,
Correct Answer : - B ) 18 ,
10 ) Metallic character . . . . . . . . . . . down the group .
A ) increases , B ) decreases ,
C ) no change , D ) None of these ,
Correct Answer : - A ) increases ,
Now go to online quiz section and Chemistry Quiz 6 is uploaded related to these mcqs , so check your preparation by this link : -
 increases from left to right and decreases from top to down , B ) decreases from left to right and increases from top to down , C ) increases from left to right and increases from top to down , D ) None of these ,){kind=link}
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