CHEMISTRY

Question 1

Dipole moment (μ)

Answer 1

μ ∝ ∆E.N

Question 2

Ionic Bond

Answer 2

Non-directional

Non-rigid

Question 3

Bond Angles

Answer 3

CH4         109.5°   
NH3          107.5°
H20          104°
NF3          102°
H2S          92°

Question 4

Bond Energy Order

Answer 4

C≡O > N≡N > C≡N > C≡C

Question 5

H2O AND H30+ HYBRIDIZATION

Answer 5

BOTH SP3

+ sign coordinate covalent bond not of loss of electron

Question 6

FAJAN’S RULE

Answer 6

size ↓
polarizing power ↑
covalent character ↑
charge density ↑
BERYLLIUM

Question 7

% of s and p character

Answer 7

Bond length ∝ 1/s ∝ p

Bond energy ∝ s ∝ 1/p

Question 8

pi-bond and sigma bond

Answer 8

Bond energy or Overlapping ∝ pi ∝ 1/sigma

Bond length ∝ sigma ∝ 1/pi

Question 9

∆E.N = 1.7 units

Answer 9

50% covalent

50% ionic

Question 10

Always remember when group VIIA is given

Answer 10

Cl has max electron affinity

bond energy

Question 11

ORDER OF EXTENT OF HEAD-TO-HEAD OVERLAPING

BOND ENERGY

Answer 11

p-p > p-s > s-s

Question 12

Oxygen is surrounded by how many hydrogens in crystal lattice of ice

Answer 12

4

Question 13

What temp would be required to change 6dm3 of gas at 1atm pressure and 27 to 10dm3 at 0.8atm pressure

Answer 13

400k

PV/T(kelvin)=PV/T

Question 14

imp

Answer 14

B.P ∝ ∆E.N ∝ IMF ∝ Size ∝ 1/Evaporation ∝ 1/vapour pressure

Question 15

14.7 PSI = ?

Answer 15

1 atm

Question 16

rate ∝ temp ∝ 1/activation energy

Answer 16

Ea not as such depend (catalyst ↦ rate↑ ↦ Ea↓)

rate constant ∝ temp ONLY

Question 17

no. of moles of CO2 which contain 8g of oxygen

CO

Answer 17

CO2                                     CO
(oxygen=32g)                      (oxygen=16g)
8/32  =  1/4moles                8/16  =  1/2moles

Question 18

Enthalpy of combustion of C and CO are -393.5 and -283kJ/mol. The enthalpy of formation of CO per mole is

Answer 18

C+O2→CO2  -393.5   MAIN
C+1/2O2→CO  ?
CO+1/2O2→CO2  -283 
∆H=H1+H2
-393.5=H1-283 
-393.5+283=H1
-110kJ/mol=H1

Question 19

Phenol on litmus test

Answer 19

No effect
Not change from blue to red
Weak acid

Question 20

Wurtz synthesis

Answer 20

Aka coupling reaction
Catalyst dry ethyl ether
2R-X + 2Na alkane
Unsymmetrical  mixture of alkane
Symmetrical even no of C

Question 21

CCl4

Answer 21

Organic compound

Form from alkane

Question 22

Alc.KOH

Answer 22

1-chlorobutane. 1-butene

2-chlorobutane. 1-butene(minor) 2-butene(major)

Question 23

Elimination rxn only order

Answer 23

3°＞ 2°＞ 1°

Question 24

Melting point order in group-II

Answer 24

Be ＞ Ca ＞ Sr ＞ Ba ＞ Mg

Question 25

Al and Mg oxidize

Answer 25

Form its oxides and nitrites only

Question 26

Regain Acetylene from copper/silver acetylene

Answer 26

React strong acid HCl or H2SO4

Question 27

Binding energy depends upon

Answer 27

Depend Valance e's | Max Vanadium 5

Question 28

Leaving group

Answer 28

∝ 1/bond energy ∝ bond length ∝ size

Question 29

Ca(OH)2

Answer 29

Saturated solution lime water test CO2 | Suspension milk of lime white wash

Question 30

Fehling cupric tartarate

Answer 30

Benetict cupric citrate

Question 31

Nitriles

Answer 31

Reduce LiAlH4 amines H2O carboxylic acid Grignard reagent ketone

Question 32

Ester

Answer 32

LiAlH4 alcohol H20 carboxylic acid and alcohol acidic medium Salt of carboxylic acid alcohol basic medium saponification Grignard reagent ketone

Question 33

Amide

Answer 33

H20 carboxylic acid and NH3 | LiAlH4 amine

Question 34

Acetic anhydride

Answer 34

Alcohol ester carboxylic acid H2O carboxylic acid 2 NH3 amide carboxylic acid

Question 35

Acyl chloride

Answer 35

H2O carboxylic carboxylic acid HCl Alcohol ester HCl NH3 amide HCl Carboxylate ion anhydride

Question 36

Iodine

Answer 36

Gas nonpolar 266.6pm Solid polar 271.5pm Diff 4.9

Question 37

Nonspontaneous Water break H2O H2 + 1/2O2

Question 38

Increase in rxn when rate of rxn increase by 4 times

Answer 38

2 laps of 10K / °C 2K 10K 22K the rate constant for a chemical reaction gets doubled for every 10oC rise in temperature

Question 39

Acidified dichromate VI

Answer 39

the orange solution containing the dichromate(VI) ions is reduced to a green solution containing chromium(III) ions. Strong Oxidizing agent

Question 40

Denaturation of protein

Answer 40

pH change Temp change Add detergent oxidizing agent Add urea reducing agent

Question 41

The rate of reaction decreases as the reaction proceeds because the concentration of reactants is high at the start and with time, this concentration decreases and the reaction gets slower

Question 42

7s ＞ 6p ＞ 5d ＞ 4f

Question 43

grignard reagent

Answer 43

``` carbonation cooh formaldehyde 1alcohol acetaldehyde 2alcohol acetone 3alcohol rcn aldehyde or ketone ```