Chapter 1 : Some Basic Concepts of Chemistry

Question 1

Name two life saving drugs effective in Cancer therapy -

Answer 1

Cisplatin and taxol

Question 2

___underscore is used for helping AIDS victims

Answer 2

AZT (Azidothymidine)

Question 3

_____have definite volume but not definite shape

Answer 3

Liquid

Question 4

Properties of a compound are different from its constituent elements. T/F

Answer 4

True

Question 5

Physical properties can be measured or absorbed without changing the identity or composition of the substance.T/F

Answer 5

True

Question 6

Name the 7 SI base unit.

Answer 6

m, kg, sec, ampere, Kelvin, Mole, candela

Question 7

Prefix used for 10 to the power minus 15 is

Answer 7

Femto

Question 8

Prefix used for 10 to the power minus 12 is

Answer 8

Pico

Question 9

Prefix used for 10 to the power minus 9 is

Answer 9

Nano

Question 10

Prefix used for 10 to the power minus 6 is

Answer 10

Micro

Question 11

SI unit of mass is gram.T/F

Answer 11

False

Question 12

Right relation between degree Fahrenheit and degree Celsius scale

Answer 12

Degree fahrenheit equals to 9 by 5 degree Celsius + 32

Question 13

Accuracy / Precision refers to the closeness of various measurements for the same quantity

Answer 13

Precision

Question 14

What is accuracy

Answer 14

Accuracy is the agreement of a particular value to the true value of the result

Question 15

All non zero digits are significant.T/F

Answer 15

True

Question 16

Zeros between two non zero digits are not significant.T/F

Answer 16

False

Question 17

Zeros at the end or right of a number are significant, provide they are the right side of the decimal point.T/F

Answer 17

True

Question 18

Significant figures in e (Euler number) is

Answer 18

Infinite

Question 19

According to significant number, 2.5 X 2.50 is equal to

Answer 19

6.2

Question 20

According to significant figures 1.5 x 70 is equal to

Answer 20

1.0 x 100

Question 21

Law of multiple proportions given by

Answer 21

Antoine lavoisier

Question 22

Zeros preceding the first non zero digit are significant.T/F

Answer 22

False

Question 23

Law of Definite proportions are given by

Answer 23

Joseph proust

Question 24

Law of multiple proportions given by

Answer 24

Delton

Question 25

Equal volumes of all gases at the same temperature and pressure should contain an equal molecules this statement was given by

Answer 25

Avogadro

Question 26

1 AMU equals to_____kg

Answer 26

1.66 multiply 10 to the power minus 24 kg

Question 27

Define mole

Answer 27

One mole is the amount of substance that contain as many particles or entities as their are atoms in exactly 12 gram of carbon 12 isotope

Question 28

Mass percent equals to

Answer 28

Mass of solute divided by mass of solution multiplied by 100

Question 29

Mole fraction equals to

Answer 29

Number of moles of solute divided by number of solute + moles of solvent

Question 30

Molarity equals to

Answer 30

Number of moles of solute divided by volume of the solution in litres

Question 31

Molality equals to

Answer 31

Number of the moles of solute divided by mass of solvent in kg

Question 32

Molarity changes with change in temperature.T/F

Answer 32

True