Question # 1

How many moles of AgCI are produced by combination of 1.0 mole of AgNO₃and 2.0 mole of NaCI

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1.0

2.0

3.0

4.0

Actual yield is mostly less than the theoretical yield due to the reason that

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Rates of reactions are slow

Loss of the product during handling

Reactions are never completed 100%

Law of conservation of mass is not true

When one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide.

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Diamond

C2H6

Methane

CO2

The ration of number of molecules of 2 g H2 g to number of molecules of 64 g gaseous oxygen is.

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1:1

1:2

1:32

1:4

The mass of two moles of electrons is

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1.10 mg

1.008 mg

0.184 mg

1.673 mg

Paalladium has isotopes.

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6

₇

8

9

Haemoglobin is a Macro molecule and consists of approximately atoms.

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5000

10,000

68000

15000

In Al2O3, the ratio between the ions is

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1 :2

2:1

2:3

3:2

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

Cadmium has isotopes.

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3

4

5

9

A limiting reactant is one.

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Which is present in least amount

Which produces minimum number of moles of product

Which produces maximum number of moles product

Does not effect the amount of product.

The largest number of molecule are present.

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3.6 g of H2O

4.6 g of C2H5OH

2.8 g of CO

5.4 g of N2O5

What has a mass equal to that of one mole of water.

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22.4 dm3 of water

One mole of steam

One molecule of water

Two moles of hydrogen molecules and one mole of oxygen molecules.

Isotopes differ in

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Properties which depend upon mass

Arrangement of electrons in orbital

Chemical properties which depend upon weight

Atomic number

One mole of CH₃OH and one mole of C₂H₅OH have

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Equal number of atoms

Equal number of molecules

Equal number of electrons

Equal number of protons

12.04 x 10²³atoms of nitrogen gas is equal to.

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1 mol

2 mol

3 mol

4 mol

Bromine has isotopes

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2

4

8

6

The Avogadro constant is the number of.

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Atoms in 1 g of helium ga

Molecules in 35.5 g of chlorine gas

Atoms in 6 h graphite

Atoms in 24 g of magnesium

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