Question # 1

What amount of NaOH is required to prepare 500 g of 0.5 molal solution.

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10 g

20 g

30 g

40 g

Which of the following will have the same number of molecule at STP.

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280 cm3 CO2 and 280 cm3 of N2O

11.2 dm3 of O2 and 32 g of O2

44 g of CO2 and 11.2 dm3 of CO

28 g of N2 and 5.6 dm3 of oxygen

In silver oxide battery, anode is made of.

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Zinc

Copper

Lead

Graphite

Half -Life for a given reaction is doubled if initial concentration is doubled. The order of reaction is.

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0

1

2

3

18 g glucose is dissolved in 90 g of water. The relative lowering of vapour pressure is equal to.

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1/5

5.1

1/51

6

The element nickel has isotopes.

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3

2

5

7

the number of Al³⁺ ion sin AlCl₃is 2.007 x 10²³. The number of Cl- ions are.

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6.02 x 10²³

3.01 x 10²³

1.5 x 10²³

In a group of periodic table, ionization energy.

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Decreases

Increases

Remains same

First increases than increases

Which substance have delta E = Delta H and no pressure - volume work.

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Liquids only

Solids only

Gases only

Liquids and solids

In electrolysis of aqueous NaCl, Cl-ions are.

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Oxidized at anode

Oxidized at cathode

Reduced at cathode

Neither oxidized nor reduced

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dm⁺⁶mole^-2

mole²dm^-6

Mole dm^-3

Having no units

Existence of an element in more than one crystalline form is known as.

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Anisotropy

Allotropy

Isomorphism

Unit cell

If 2 mol of an ideal gas at 546 K occupy a volume of 44.8 dm3, the pressure must be.

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1 atm

2 atm

3 atm

4 atm

In which one of the following pairs do the molecule have similar shape.

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BF3 and AlCl3

CO2 and H2O

CH4 and PH3

NH3 and BCl3

The number of molecules in one dm³of water is close to

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The molar volume of CO₂is maximum at

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STP (0°C and 1 atm)

127° C and 1 atm

0°C and 2 atm

273°C and 2 atm

A cell in which electric current is produced as a result of spontaneous redox reaction is called.

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Electrolytic cell

Galvanic cell

Half cell reaction

Down's cell

The total kinetic energy of one mole of an ideal gas is given by

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3/2 RT

1/2 KT

1/2 RT

3/2 KT

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