Question

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1)Which of the following orbital is not possible?

a.4f
b.2d
c.2p
d.3s

2)Which of the following bond is most polar?

a.Cl - F
b.Br - F
c.I - F
d.F - F

3)The elements with atomic numbers 35, 53 and 85 are all

a. halogens
b.noble gas
c.heavy metals
d.light metals

4)The oxidation number of an element in a compound is evaluated on the bases of certain rules. Which of the following is incorrect in this respect?

a.The algebraic sum of all the oxidation numbers in a compound is zero
b.An element in free state has oxidation number zero
c.In all it's compounds, the oxidation number of Fluorine is -1
d.The oxidation number of hydrogen is always +1

5)Elements of which of the following groups of the periodic table do not form hydride?

a.Groups - 15, 16, 17
b.Groups - 7, 8, 9
c.Groups - 1 and 2
d.Groups - 13 and 14

6)The property of absorption of hydrogen gas by a metal is called ____________.

7)The angle corresponding to sp^2 hybridization is _____________.

8)The oxidation number of fluorine in NaF is ____________.

9)___________ series of hydrogen spectrum lies in the visible region.

10)_______________ is the only element of group 6 that forms hydride.
​

Answer 1

1. 2p

2. CL–F

3. noble gases

4. a the algebraic sum of all the oxidation numbers in a compound is zero

5. c Groups- 7,8,9

6. occlusion

7. 120 degree

8. 1

9. Lyman

10. Chromium

I hope it is helpful

by bro Sunny