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MDCAT > CHEMISTRY > Flashcards

CHEMISTRY Flashcards

1
Q

Dipole moment (μ)

A

μ ∝ ∆E.N

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2
Q

Ionic Bond

A

Non-directional

Non-rigid

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3
Q

Bond Angles

A 
CH4         109.5°   
NH3          107.5°
H20          104°
NF3          102°
H2S          92°
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4
Q

Bond Energy Order

A

C≡O > N≡N > C≡N > C≡C

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5
Q

H2O AND H30+ HYBRIDIZATION

A

BOTH SP3

+ sign coordinate covalent bond not of loss of electron

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6
Q

FAJAN’S RULE

A 
size ↓
polarizing power ↑
covalent character ↑
charge density ↑
BERYLLIUM
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7
Q

% of s and p character

A

Bond length ∝ 1/s ∝ p

Bond energy ∝ s ∝ 1/p

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8
Q

pi-bond and sigma bond

A

Bond energy or Overlapping ∝ pi ∝ 1/sigma

Bond length ∝ sigma ∝ 1/pi

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9
Q

∆E.N = 1.7 units

A

50% covalent

50% ionic

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10
Q

Always remember when group VIIA is given

A

Cl has max electron affinity

bond energy

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11
Q

ORDER OF EXTENT OF HEAD-TO-HEAD OVERLAPING

BOND ENERGY

A

p-p > p-s > s-s

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12
Q

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

A

4

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13
Q

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

A

400k

PV/T(kelvin)=PV/T

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14
Q

imp

A

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

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15
Q

14.7 PSI = ?

A

1 atm

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16
Q

rate ∝ temp ∝ 1/activation energy

A

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

rate constant ∝ temp ONLY

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17
Q

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

CO

A 
CO2                                     CO
(oxygen=32g)                      (oxygen=16g)
8/32  =  1/4moles                8/16  =  1/2moles
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18
Q

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

A 
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
19
Q

Phenol on litmus test

A

No effect
Not change from blue to red
Weak acid

20
Q

Wurtz synthesis

A 
Aka coupling reaction
Catalyst dry ethyl ether
2R-X + 2Na alkane
Unsymmetrical  mixture of alkane
Symmetrical even no of C
21
Q

CCl4

A

Organic compound

Form from alkane

22
Q

Alc.KOH

A

1-chlorobutane. 1-butene

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

23
Q

Elimination rxn only order

A

3°＞ 2°＞ 1°

24
Q

Melting point order in group-II

A

Be ＞ Ca ＞ Sr ＞ Ba ＞ Mg

25
Q

Al and Mg oxidize

A

Form its oxides and nitrites only

26
Q

Regain Acetylene from copper/silver acetylene

A

React strong acid HCl or H2SO4

27
Q

Binding energy depends upon

A

Depend Valance e’s

Max Vanadium 5

28
Q

Leaving group

A

∝ 1/bond energy ∝ bond length ∝ size

29
Q

Ca(OH)2

A

Saturated solution lime water test CO2

Suspension milk of lime white wash

30
Q

Fehling cupric tartarate

A

Benetict cupric citrate

31
Q

Nitriles

A

Reduce LiAlH4 amines
H2O carboxylic acid
Grignard reagent ketone

32
Q

Ester

A

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

33
Q

Amide

A

H20 carboxylic acid and NH3

LiAlH4 amine

34
Q

Acetic anhydride

A

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

35
Q

Acyl chloride

A

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

36
Q

Iodine

A

Gas nonpolar 266.6pm
Solid polar 271.5pm
Diff 4.9

37
Q

Nonspontaneous
Water break
H2O H2 + 1/2O2

A
38
Q

Increase in rxn when rate of rxn increase by 4 times

A

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

39
Q

Acidified dichromate VI

A

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

40
Q

Denaturation of protein

A

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

41
Q

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

A
42
Q

7s ＞ 6p ＞ 5d ＞ 4f

A
43
Q

grignard reagent

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

MDCAT (4 decks)

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