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Chemistry Class 12 Chapter 1
Periodic Classification of Elements and Periodicity
Test 10
1.
Less electronegative elements such as Be,Ga,Al etc form?
Covalent halides
Ionic halides
All
Polymeric halides
2.
Metallic character of alkali metals?
No regular trend
Decreases down the group
Remain same
Increases down the group
3.
High value of electron affinity means?
Atom may form die-positive ion
Atom will lose electron easily
The reason is un-known
Atom will gain electron easily
4.
Which possess the maximum hydration power?
Magnesium ion
Potassium ion
Calcium ion
Sodium ion
5.
Metallic character of 7A group down the group?
Increases
No regular trend
Decreases
Remain constant
6.
Shielding effect across the period?
Increases
Decreases
All
Can not be predicted
7.
Addition of 2nd electron to the uninegative ion is?
Endothermic
Exothermic
All
Both
8.
Halides in which atoms act as a bridge between two atoms of the other elements are called?
Polymeric halides
Covalent halides
None of the above
Electronegative halides
9.
Which of the following always increases while going from top to bottom?
Reducing behavior
Electronegativity
Oxidation behavior
Metallic character
10.
Oxidation state of an atom represents?
No. of electrons gained
None of the above
No. of electrons lost
No. of electrons gained or lost
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