UNIT -1 FUNDAMENTAL OF CHEMISTRY

  

Objective Part

Choose the right option.                               10×1=10

 

A

B

C

D

1

How many no of moles are equivalent to 8 grams of CO2

0.15

0.18

0.21

0.24

2

Qualitative and quantitative analysis are carried in:

Environmental Chemistry

Analytical Chemistry

Organic Chemistry

Nuclear Chemistry

3

The molar mass of H2SO4 is:

98g

98amu

9.8g

9.8amu

4

The fixed ratio of hydrogen and oxygen by mass is:

2:1

8:1

1:8

1:2

5

NH4+ and H30+ are the examples of:

Anion

Cation

Radical

Ion

6

Valency of chlorine is:

4

3

2

1

7

The number of protons present in the nucleus of its atom is known as:

Atomic number

Atomic mass

Atomic unit

Formula unit

8

A piece of matter in pure form is termed as:

Element

Mixture

Substance

Matter

9

A molecule containing same type of atoms is called:

Homoatomic molecule

Heteroatomic molecule

Both a and b

None of these

10

_______ are atoms or group of atoms possessing an odd (unpaired) electron.

Molecules

Free radicals

Ions

Molecular ions

 

 

Subjective

 

Answer the short questions.                                           10×2=20

1.      How does homogenous mixture differ from heterogenous mixture?

2.      Differentiate between molecular mass and formula mass?

3    Define industrial chemistry and analytical chemistry?

4.      What is empirical formula of acetic acid (CH3COOH)? Find out its molecular mass?

5.      Find out the mass of 3 moles of oxygen atoms?

6.      Define relative atomic mass.

7.      Differentiate between physical and chemical properties.

8.      How many times is 1 mole of oxygen atom heavier than 1 mole of hydrogen atom?

9.      Differentiate between ions and free radicals.

10.  Write down the relationship between mole and mass.

 

Long questions 5×1=5

1.      (a) List five characteristics by which compound can be distinguished from mixture.      3

(b) How many total atoms are required to prepare 60g of HNO3?                  2