Question # 1

Films are coated by special chemical known as ____________ detectors.

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Photographic

Image

Nil

Both

The practical unit of concentration is

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%v/v

%v/m

%m/m

M

The no. of periods in modern periodic table are

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7

11

18

23

Considering the electronic configuration of atoms which atom with the given atomic number will be the most stable one?

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6

8

10

12

The valency of nitrogen is

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1

2

3

4

Br2 + H2S __ 2HBr + S, which one is oxidizing agent:

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H2S

Br2

S

2HBr

When an electronegative element combines electropositive element the type of bonding is

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covalent

ionic

polar covalent

coordinate covalent

Which is an acceptor molecule/ion?

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N₂

O₂

H⁺

CH₄

The equation of relationship between atomic number (Z) and mass number (A) is

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A = Z + N

A = Z - n

A = Z

A =2Z + n

............. are sonorous.

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Metals

Solids

Metals

Force

____________ of copper is done by electrolysis.

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Production

Refining

Both

Nil

The smallest under of an ionic compound is

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Atom

Formula unit

Ion

Molecule

How many numbers of moles are equivalent to 8 grams of CO₂?

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0.15

0.18

0.21

0.24

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