Question # 1

The sum of mole percent of all the components of solution is always equal to.

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Unity

100

Less than one

Less than 100

As compared to pure atomic orbitals the hybrid orbitals have.

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Low energy

High energy

Same energy

None of these

Conduction of electricity through gases under reduced pressure is due to the transportation of.

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positive charge

Negative charge

Both types of charges

None of these

pH of buffer is calculated by.

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Sorenson equation

Mosley equation

Henderson equation

De broglie equation

During the electrolysis of molten NaCI, the ion which is reduce is

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In order to mention the oiling point of water at 110 ^oC, the external pressure should be.

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Between 760 torr and 1200 torr

Between 200 torr and 760 torr

765 torr

Any value of pressure

The relationship between K_pand K_cis given by

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Conductivity of metal decreases by increasing temperature because.

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Atoms are converted to ions

Atoms oscillates and hinder the movement of free electrons.

Ions are converted into atoms

Velocity of mobile electrons increases

_________ was derived by C.M Guldberg and P Waage in 1864

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Law of conservation of Mass

Law of mass action

Law of conservation of energy

Distribution law

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1

2

3

None of these

The pH of human blood is

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7.0

7.4

4.0

6.5

Which of the following will have the same number of molecules at STP

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280 cm³of CO₂and 280 cm³of N₂O

11.2 dm³of O₂and 32 g of O₂

44 g of CO₂and 11.2 dm³of CO

28 g of N₂and 5.6 dm³of oxygen

The nature of copper crystals is

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Metallic

Ionic

Covalent

Molecular

Which pair of compound are isomorphic in nature.

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NaCl and KNO3

KNO3 and MgO

MgO and NaF

CaF and CaCO3

Vapour pressure of liquid depends upon

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Amount of liquid

Surface area

Temperature

Size of container

Both CH4 and NH3 are four electron pair system the angles of CH4 and NH3 are 109.5^o and 107.5 ^o respectively. This deviation is due to.

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Hydrogen bonding in ammonia

Lone pair attraction

Lone pair occupy more space and repel to other bond pairs

Lone pair lone pair repulsion

Solubility of which substance decreases by increasing temperature.

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NaNO3

KNO2

NaCl

Ce2(SO4)3

Forces of attraction between He atoms are.

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Hydrogen bonding

London forces

Debye forces

Ion dipole forces

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