Some Basic Concepts of Chemistry - 1

Question 1

Total number of atoms of all elements present in 1 mole of ammonium dichromate is ?

Accepted Answer

114 × 10²³

Answer

14

Answer

19

Answer

6 × 10²³

Question 2

If one mole of ethanol (C₂H₅OH) completely burns to carbon dioxide and water, the weight of carbon dioxide formed is about -
(C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O)

Accepted Answer

88g

Answer

22g

Answer

45g

Answer

66g

Question 3

The iron atoms in 1720 amu of ferric ferrocyanide is .....................

Accepted Answer

14

Answer

2

Answer

2

Answer

3

Question 4

Accepted Answer

10.8

Answer

10.2

Answer

11.2

Answer

10.0

Question 5

The hydrated salt Na₂SO₄.nH₂O, undergoes 55% loss in weight on heating and becomes anhydrous. The value of n will be

Accepted Answer

10

Answer

5

Answer

3

Answer

7

Question 6

Insulin contains 3.4% sulphur. What will be the minimum molecular weight of insulin ?

Accepted Answer

941.176

Answer

94.176

Answer

1884

Answer

976

Question 7

How many moles of electron weight one kilogram ?

Accepted Answer

Answer

Answer

Answer

Question 8

Accepted Answer

40,30

Answer

60,40

Answer

20,30

Answer

30,20

Question 9

Accepted Answer

1.910 M and 0.955 M

Answer

0.955 M and 1.910 M

Answer

1.90 M and 1.910 M

Answer

0.477 M and 0.477 M

Question 10

The largest number of molecules is present in

Accepted Answer

34 g of H₂O

Answer

28 g of CO₂

Answer

46 g of CH₃OH

Answer

54 g of N₂O₅

Question 11

25 g of NaOH is dissolved in 50 mL of water. The molarity of the solution is

Accepted Answer

12.5 M

Answer

12 M

Answer

24 M

Answer

25 M

Question 12

Calculate percentage change in M_avg of the mixture, if PCl₅ undergo 50% decomposition.

PCl₅ → PCl₃ + Cl₂

Accepted Answer

33.33 %

Answer

50%

Answer

66.66 %

Answer

Zero

Question 13

Accepted Answer

1

Answer

12.16

Answer

1 × 10^–3

Answer

12.16 × 10^–3

Question 14

Calculate the weight of lime (CaO) obtained by heating 200 kg of 95% pure lime stone (CaCO₃).

Accepted Answer

106.4 kg

Answer

104.4 kg

Answer

105.4 kg

Answer

212.8 kg

Question 15

Accepted Answer

4

Answer

6

Answer

3

Answer

2

Question 16

Accepted Answer

55.8

Answer

27.9

Answer

159.6

Answer

79.8

Question 17

A carbon compound containing carbon and oxygen has molar mass equal to 288. On analysis it is found to contain 50% by mass of
each element. Therefore molecular formula of the compound is -

Accepted Answer

C₁₂O₉

Answer

C4O3

Answer

C3O4

Answer

C₉O₁₂

Question 18

Four one litre flasks are separately filled with the gases hydrogen, helium, oxygen and ozone at the same room temperature and pressure.
The ratio of total number of atoms of these gases present in the different flasks would be

Accepted Answer

2 : 1 : 2 : 3

Answer

1 : 1 : 1 : 1

Answer

1 : 2 : 2 : 3

Answer

3 : 2 : 2 : 1

Question 19

Accepted Answer

A₃(BC₄)₂

Answer

A₂(BC₂)₂

Answer

A₂(BC₃)₂

Answer

A₃(BC₂)₂

Question 20

Accepted Answer

2 g H2

Answer

7 g N2

Answer

16 g NO2

Answer

16 g O2

Question 21

The mass of 2 gram atoms of calcium

Accepted Answer

80 g

Answer

2 g

Answer

0.05 g

Answer

0.5 g

Question 22

What volume of 0.4-M FeCl₃.6H₂O will contain 600 mg of Fe³⁺ ?

Accepted Answer

26.78 mL

Answer

49.85 mL

Answer

147.55 mL

Answer

87.65 mL

Question 23

Accepted Answer

Answer

Answer

Answer

Question 24

Accepted Answer

CH3O

Answer

CHO

Answer

CH4O

Answer

CH2O

Question 25

At 100ºC and 1 atm, if the density of liquid water is 1.0 g cm^–3 and that of water vapor is 0.0006 g cm^–3, then the volume occupied by water molecules in 1 litre of steam at that temperature is -

Accepted Answer

0.6 cm3

Answer

6 cm3

Answer

60 cm3

Answer

0.06 cm3

Question 26

Accepted Answer

2 N

Answer

N/2

Answer

N

Answer

4 N

Question 27

Accepted Answer

0.0093 mol

Answer

2.10 mol

Answer

0.186 mol

Answer

0.21 mol

Question 28

Accepted Answer

0.65 g

Answer

65 g

Answer

0.065 g

Answer

6.5 g

Question 29

Volume of a gas at NTP is 1.12 × 10^–7 c.c. The number of molecules in it will be -

Accepted Answer

3.01 × 10¹²

Answer

3.1 × 10²⁰

Answer

30.1 × 10²³

Answer

3.01 × 10²⁴

Question 30

Accepted Answer

2.16 g

Answer

2.48 g

Answer

2.32 g

Answer

2.64 g

Some Basic Concepts of Chemistry - 1 - Free MCQ Test with solutions

MCQ Practice Test & Solutions: Some Basic Concepts of Chemistry - 1 (30 Questions)

Total number of atoms of all elements present in 1 mole of ammonium dichromate is ?

If one mole of ethanol (C₂H₅OH) completely burns to carbon dioxide and water, the weight of carbon dioxide formed is about -
(C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O)

The iron atoms in 1720 amu of ferric ferrocyanide is .....................

The hydrated salt Na₂SO₄.nH₂O, undergoes 55% loss in weight on heating and becomes anhydrous. The value of n will be

Insulin contains 3.4% sulphur. What will be the minimum molecular weight of insulin ?

How many moles of electron weight one kilogram ?

The largest number of molecules is present in

25 g of NaOH is dissolved in 50 mL of water. The molarity of the solution is

Calculate percentage change in M_avg of the mixture, if PCl₅ undergo 50% decomposition.
PCl₅ → PCl₃ + Cl₂

Calculate the weight of lime (CaO) obtained by heating 200 kg of 95% pure lime stone (CaCO₃).

A carbon compound containing carbon and oxygen has molar mass equal to 288. On analysis it is found to contain 50% by mass of
each element. Therefore molecular formula of the compound is -

Four one litre flasks are separately filled with the gases hydrogen, helium, oxygen and ozone at the same room temperature and pressure.
The ratio of total number of atoms of these gases present in the different flasks would be

The mass of 2 gram atoms of calcium

What volume of 0.4-M FeCl₃.6H₂O will contain 600 mg of Fe³⁺ ?

At 100ºC and 1 atm, if the density of liquid water is 1.0 g cm^–3 and that of water vapor is 0.0006 g cm^–3, then the volume occupied by water molecules in 1 litre of steam at that temperature is -

Volume of a gas at NTP is 1.12 × 10^–7 c.c. The number of molecules in it will be -

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Some Basic Concepts of Chemistry - 1 - Free MCQ Test with solutions

MCQ Practice Test & Solutions: Some Basic Concepts of Chemistry - 1 (30 Questions)

Total number of atoms of all elements present in 1 mole of ammonium dichromate is ?

If one mole of ethanol (C2H5OH) completely burns to carbon dioxide and water, the weight of carbon dioxide formed is about -(C2H5OH + 3O2 → 2CO2 + 3H2O)

The iron atoms in 1720 amu of ferric ferrocyanide is .....................

The hydrated salt Na2SO4.nH2O, undergoes 55% loss in weight on heating and becomes anhydrous. The value of n will be

Insulin contains 3.4% sulphur. What will be the minimum molecular weight of insulin ?

How many moles of electron weight one kilogram ?

The largest number of molecules is present in

25 g of NaOH is dissolved in 50 mL of water. The molarity of the solution is

Calculate percentage change in Mavg of the mixture, if PCl5 undergo 50% decomposition.PCl5 → PCl3 + Cl2

Calculate the weight of lime (CaO) obtained by heating 200 kg of 95% pure lime stone (CaCO3).

A carbon compound containing carbon and oxygen has molar mass equal to 288. On analysis it is found to contain 50% by mass ofeach element. Therefore molecular formula of the compound is -

Four one litre flasks are separately filled with the gases hydrogen, helium, oxygen and ozone at the same room temperature and pressure.The ratio of total number of atoms of these gases present in the different flasks would be

The mass of 2 gram atoms of calcium

What volume of 0.4-M FeCl3.6H2O will contain 600 mg of Fe3+ ?

At 100ºC and 1 atm, if the density of liquid water is 1.0 g cm–3 and that of water vapor is 0.0006 g cm–3, then the volume occupied by water molecules in 1 litre of steam at that temperature is -

Volume of a gas at NTP is 1.12 × 10–7 c.c. The number of molecules in it will be -

Chemistry for JEE Main & Advanced

Chemistry for JEE Main & Advanced

Top Courses for JEE

About this JEE Practice Test

Explore more JEE Study Resources

If one mole of ethanol (C₂H₅OH) completely burns to carbon dioxide and water, the weight of carbon dioxide formed is about -
(C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O)

The hydrated salt Na₂SO₄.nH₂O, undergoes 55% loss in weight on heating and becomes anhydrous. The value of n will be

Calculate percentage change in M_avg of the mixture, if PCl₅ undergo 50% decomposition.
PCl₅ → PCl₃ + Cl₂

Calculate the weight of lime (CaO) obtained by heating 200 kg of 95% pure lime stone (CaCO₃).

A carbon compound containing carbon and oxygen has molar mass equal to 288. On analysis it is found to contain 50% by mass of
each element. Therefore molecular formula of the compound is -

Four one litre flasks are separately filled with the gases hydrogen, helium, oxygen and ozone at the same room temperature and pressure.
The ratio of total number of atoms of these gases present in the different flasks would be

What volume of 0.4-M FeCl₃.6H₂O will contain 600 mg of Fe³⁺ ?

At 100ºC and 1 atm, if the density of liquid water is 1.0 g cm^–3 and that of water vapor is 0.0006 g cm^–3, then the volume occupied by water molecules in 1 litre of steam at that temperature is -

Volume of a gas at NTP is 1.12 × 10^–7 c.c. The number of molecules in it will be -