Question # 1

Following are elements of 2nd period.Which atom is bigger in size?

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Li

Be

B

C

The empirical formula of glucose is

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CHO

CH2O

C2HO

CHO2

Which one metal can be cut with a knife?

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Na

Mg

AI

Ca

Neutrons have _________ charge.

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+

_

No

Nil

A _________ is a pure substance is made up of two or more elements.

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Mixture

Elements

Solution

Compound

............... periodic table consist of group & periods.

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Bohr

Rutherford

Mendeleev's

Nil

Which is kept constant in the Charle's law:

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Pressure

Temperature

Volume

Mass

A heterogeneous mixture of different substance are called:

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Solution

Suspension

Colloids

Nil

One amu (atomic mass unit) is equivalent to:

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1.66x10^-24 mg

1.66x 10^-24g

1.66x10 g

1.66x10^-23mg

Which molecule has single covalent bond?

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O₂

N₂

CI₂

CO₂

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 mass of one molecule of water is:

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18 amu

18g

18mg

18kg

For ________________ "like dissolves like".

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Metals

Bonds

Solubility

Nil

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