Basic Concepts-Mole

Question 1

Role of intermolecular forces

Answer 1

Keep constituent particles together (force of attraction)

IMF more = less intermolecular distance

Maximum in solids

Question 2

Role of thermal energy

Answer 2

Keep constituent particles apart (due to motion of particles)

Max in gases

Question 3

In what state of matter IMF&raquo_space;> thermal energy

Answer 3

Solid

Question 4

Which state of matter capable of vibrational and translational but not rotational motion

Answer 4

Liquids

Question 5

What is matter

Answer 5

Anything that has mass and occupies space/volume

Question 6

What is atomicity

Answer 6

No. Of atoms

Question 7

All compounds are molecules. True or false

Answer 7

True

Question 8

Oxygen is a molecule and compound. True or false

Answer 8

False

Question 9

Absolute mass of proton and neutron

Answer 9

1.67 into 10^-27 kg

Question 10

Absolute mass of electron

Answer 10

9.1 into 10^-31 kg

Question 11

Charge on proton and neutron without sign

Answer 11

1.6 into 10^-19 C

Question 12

Relative mass of electron

Answer 12

1/1837 amu or almost 0 atomic mass unit

Question 13

Isotopes have same number of ——— and different number of———

Answer 13

Same proton and atomic number but different netron and atomic mass

Question 14

Isotones have same number of

Answer 14

Neutrons

Question 15

Isosteres have same

Answer 15

Number of electrons and atomicity

Question 16

Isodiaphers have

Answer 16

Same difference between neutrons and protons (not equal to 0)

Or have same neutron excess

Question 17

Value of avogadro constant or 1 mole

Answer 17

6.022 into 10^23

Question 18

Molar mass of iron or Fe

Answer 18

56 gm

1 atom 56u or 56 proton

Question 19

1/avogadro constant equals

Answer 19

1 amu or 1.6 into 10^-27 kg
Or mass of 1 proton or neutron

Question 20

Formula for number of moles

Answer 20

Question 21

What is molar volume at STP

Answer 21

22.4 l or 22400 ml/cm^3/ cc

New STP is 22.7 l

Question 22

No. of electrons = No. of protons = Mass number (A) in uncharged or neutral atom. True or false

Answer 22

True

Question 23

Law of conservation of mass given by and is not applicable for what kind of reaction

Answer 23

Lavoisier, Nuclear

Question 24

Law of definite or constant proportions is given by and not valid for what kind of molecules

Answer 24

Proust, Isotopes

Question 25

Law of multiple proportions given by

Answer 25

Dalton

Question 26

Formula for minimum molecular mass

Answer 26

Question 27

Relationship between molecular and empirical formula

Answer 27

MF = n into EF

Question 28

Answer 28

Question 29

2 equations for ideal gas

Answer 29

Question 30

1 atm of pressure in torr, mm Hg, bar and pascal

Answer 30

Question 31

Universal gas constant in J, litre atm and cal

Answer 31

Question 32

What is vapour density and its formula

Answer 32

V.D of gas = molar mass of gas/2

Question 33

What ideal gas law at constant volume

Answer 33

Gay lussac , called isochore

Question 34

If g or gram used as prefix then it represent mole. True or false

Answer 34

True

Question 35

Formula for habers process

Answer 35

Question 36

Formula of purity percentage

Answer 36

Question 37

Actual yield is more than theoretical yield. T or F

Answer 37

False, theiretical is more

Question 38

Formula for yield percentage or efficiency

Answer 38

Question 39

What is limiting reagent

Answer 39

Which reacts completely in reaction to

Answer 40

Which reacts completely in reaction

Question 41

How to find limiting reagent when you’re given with reaction equation with coefficients and number of moles of each

Answer 41