Question # 1

All are noble metals except:

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Silver

Gold

Hydrogen

Platinum

Modern periodic table can be classified into ________________.

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Elements

s, p, d, f blocks

Periods

ROWS

The simplest of these has formula:

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C60

C10

V20

C30

Which molecules is donor in nature?

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H₂

NH₃

O₂

HF

The molecular mass of water is

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16 amu

14 amu

18 amu

20 amu

.................... of an atom is not fixed.

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Size

Mass

Electronegativity

Nuclear char

The smallest under of an ionic compound is

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Atom

Formula unit

Ion

Molecule

The atomic number of potassium is:

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11

15

18

19

Hydrogen is a ____________

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Metal

Non metal

Metalloids

Nil

4^th and 5^th period of the long form of periodic table are called

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short periods

Normal periods

Long periods

Very long periods

How many time liquids are denser than gases?

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100 times

1000 times

10,000 times

100,000 times

The escape of gaseous molecules one by one is called ____________.

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Diffusion

Effusion

A & b

Nil

Mixture has _________ types.

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3

2

1

No types

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