Question # 1

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

Choose an answer

Rates of reactions are slow

Loss of the product during handling

Reactions are never completed 100%

Law of conservation of mass is not true

The Number of moles of CO2 which contain 8.0 of oxygen.

Choose an answer

0.25

0.15

0.35

1.45

12.04 x 10²³atoms of nitrogen gas is equal to.

Choose an answer

1 mol

2 mol

3 mol

4 mol

Haemoglobin is a Macro molecule and consists of approximately atoms.

Choose an answer

5000

10,000

68000

15000

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

Choose an answer

Diamond

C2H6

Methane

CO2

Tin has isotopes.

Choose an answer

9

10

11

12

How many atoms are present in half mol of oxygen gas. Gas exist in diatomic state.

Choose an answer

3.01 x 10²³

6.02 x 10²³

2 x 10²³

1.003 x 10²³

Isotopes differ in.

Choose an answer

Properties which depend upon mass

Arrangement of electrons in orbitals

Chemical properties

None of these

The number of moles of CO₂which contain 8.0 g of oxygen

Choose an answer

0.25

0.50

1.0

1.50

The number of H2O molecules in 9 grams of ice is

Choose an answer

3.01 x 10²³

6.02 x 10²³

6.02 x 10⁸

12.04 x 10²³

In mass spectrometry, ions are produced by

Choose an answer

Heat at high temperature

Passing gas through high voltage plates

Throwing fast moving electrons on gas molecules

All of them

One mole of SO2 contains

Choose an answer

6.02 x 10²³atoms of oxygen

18.1 x 10²³atoms of SO2

6.02 x 10²³atoms of Sulphur

4 g atoms of SO2

Isotopes differ in

Choose an answer

Properties which depend upon mass

Arrangement of electrons in orbital

Chemical properties which depend upon weight

Atomic number

The separation of the different isotopes in the mass spectrometer is done on the basis of

Choose an answer

Different amounts of positive changes

Charge e/m value different amounts of negative changes

Different m/e value

Velocities of the ions

Which is not a molecular ion.

Choose an answer

He+

CH3+

NH3-

CO+

Cadmium has isotopes.

Choose an answer

3

4

5

9

Many element have fractional atomic masses. This is because.

Choose an answer

the mass of the atom is itself fractional

Atomic masses are average mases of Isobars

Atomic masses are average masses Isotopes

Atomic masses are average masses of Isotopes proportional to their relative abundance.

More Classes

Other Links

Chemistry Fsc Part 1 Chapter 1 Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer