Question # 1

During the formation of water from hydrogen and oxygen, which of the following does not occur?

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Hydrogen has oxidized

oxygen has reduced

oxygen gains electrons

hydrogen behaves as oxidizing agent

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

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Size

Mass

Electronegativity

Nuclear char

Nelson's cells used to prepare caustic soda along with gases. Which of the following gas is produced at cathode?

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CI₂

H₂

O₃

O₂

The vapour pressure of a liquid increase with the:

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increase pressure

increase of temperature

increase of intermolecular forces

increase of polarity of molecules

The component of solution in larger amounts is ____________

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Solute

Solvent

a & b

Nil

According to Bohr, electrons can revolve only in this orbits whose angular momentum is

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h/2π

n 2h/π

n h2/2π

n h/2π

Which molecule has single covalent bond?

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O₂

N₂

CI₂

CO₂

In double covalent bond, every atom provides

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1 electrons

2 electrons

4 electrons

6 electrons

1 atm = ?

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1 pascal

760 mm of Hg

1 atm

1 Nm^-2

H° - H° has ________________ energy.

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Lower

Higher

Medium

Nil

positive ion hare formed by _________ of electrons.

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Gain

Loss

Sharing

Bonding

Potassium's atomic no. is :

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17

18

19

20

Gold can only be dissolved by:

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Acids

Bases

Aqua Regia

Nil

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