Question # 1

Oxidation state of fluorine is:

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+1

+2

-1

-2

The strongest hydrogen bond is in

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HF

HCl

HBr

Hl

Hydrogen bond is the strongest between the molecules of

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HF

HCl

HBr

HI

Second most element in the universe is

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He

Ne

Ar

Kr

Noble gases are placed in group

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Group IV-A

Group V-A

Group VI-A

Group VII-A

The strongest acid is

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HF

HCl

HBr

HI

Half life period of astatine is

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8.1 hrs

8.2 Hrs

8.3 hrs

8.4 hrs

Gaseous HF exists in the form of

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Monomers

Cyclic hexames

As single entity

Both (a) and (b)

Molecule of halogens exist as

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Monatomic

Diatomic

Triatomi

Polyatomic

Which of the following hydrogen halide is the weakest acid in solution?

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HF

HBr

Hl

HCl

Which halogen has Iustrous shining?

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F₂

Cl₂

Br₂

I₂

Which has the least oxidizing power?

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F₂

Cl₂

Br₂

I₂

Astatine belongs to group

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I-A

II-A

III-A

VII-A

Which is used in bacterial lamps

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He

Ne

Ar

Kr

Perchloric acid can be stored in solution form

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47%

57%

67%

77%

The only non-metal in liquid form is

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S

Cl

Br

P

Nobel gases are placed group:

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Group IV-A

Group V-A

Group VI-A

Group VII-A

Which is used in arc welding and cutting?

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He

Ne

Ar

Kr

Noble gases in the atmosphere are

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4%

3%

2%

1%

Which is present as a result of radioactive decay on earth?

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He

Ne

Ar

Kr

Non sticking coating in cooking utensils is done by

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Iron

Cooper

Plastic

Teflon

Colour of Iodine is

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Pale yellow

Greenish yellow

Red brown

Greyish black

Which halogen occurs naturally in a positive oxidation state?

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Fluorine

Chlorine

Bromine

Iodine

An element that has a high ionization energy and tends to be chemically inactive would most likely to be:

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an alkali metal

a transition element

a noble gas

a halogen

Which halogen has maximum Van-der Waal's forces?

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F₂

Cl₂

Br₂

I₂

Bleaching powder is prepared by the reaction of Cl₂with.

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Lime stone

Lime water

slaked lime

Lime

Colour of chlorine is

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Pale yellow

Greenish yellow

Red brown

Greyish black

Which of the following hydrogen halide is the weakest acid in solution

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HF

HBr

HI

HCl

A property which differs fluorine from the other halogens?

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Direct combination with inert gases

Uninegative

Diatomic

ns² , np⁵

Which is the strongest acid?

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HClO

HClO₂

HClO₃

HClO₄

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