Question # 1

Which one of the following substances is not used as drying agent in desiccators.

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Calcium chloride

Phosphorus pentoxide

Silica gel

50% NaCl

The number of moles of CO₂which contain 8.0 g of oxygen

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0.25

0.50

1.0

1.50

Which is not a molecular ion.

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He+

CH3+

NH3-

CO+

In a electrolytic cell the electrons flow from

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Cathode to anode

Anode to cathode

From cathode to anode or opposite, depending upon the nature of electrolyte

All of the above

the nature of the positive rays depend on

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The nature of the electrrode

The nature of the discharge tube

The nature of the residual gas

All of the above

Which one of the following salts dissolved in water to form a solution with a pH greater than 7

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NaCl

CuSO4

Na2CO3

NH4Cl

Energy and wavelength of a photon are related as.

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Direct

In direct

No correlation

Inverse under root

Rate of diffusion of CO and N₂are same at room temperature due to the reason, that

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Both are diatomic molecules

Both have same multiple bond in them

Both have lone pairs in them

Both have same molar masses

The mass of alpha particle is equal to.

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Four times the mass of one proton

That of one hydrogen atom

That of one electron

That of one proton

When water freezes at 0°C, its density decreases due to

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Cubic structure of ice

Empty spaces present in the structure of ice

Change of bond lengths

Change of bond angles

Tin has isotopes.

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9

10

11

12

That cell in which electrical energy is converted into chemical energy is called

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Galvanic cell

Electrolytic cell

Fuel cell

Daniel cell

Which of the following particles would on losing an electron has its outermost p-orbital as half filled

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Nitrogen atom

O⁺ion

P^-1ion

S⁺¹ion

In BeCl2, the covalent bond is formed due to overlap of

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sp -s

sp -p

sp2 -p

sp3 -p

The iodine present in water can be separated by which one of the following techniques

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Sublimation

Chromatography

Filtration

Solvent extraction

In zero order reaction the rate is independent of.

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Temperature of reaction

Concentration of reactants

Concentration of products

None of these

In zero order reaction, the rate is independent of

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Temperature of reaction

Concentration of reactants

Concentration of products

None of these

_________ 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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