Chemical… | NUST Entrance Test Chemistry

When two hydrogen atoms approach each other

Difficulty: Easy

A:

Forces of attraction operate

B:

Force of repulsion operate

C:

Forces of attraction and repulsion operate simultaneously

D:

Nothing happens

The bond length between atoms of hydrogen in the hydrogen molecules is:

Difficulty: Easy

A:

7.54 nm

B:

0.0754 nm

C:

0.754 nm

D:

0.00754 nm

Which of the following has smaller size:

Difficulty: Easy

A:

Fe^{+3}

B:

Fe^{+2}

C:

Fe^{+1}

D:

Fe

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