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Introduction Flashcards

1
Q

hydrogen is similar as well as dissimilar to

A

alkali metals and halogens

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2
Q

ionisation energy of H is near to

A

halogens

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3
Q

isotopes have similar ____ and dissimilar ______

A 
chemical properties (same electronic configuration)
physical properties (different mass)
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4
Q

isotope of hydrogen

A

protium
dueterium
tritium

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5
Q

metal + acid =

A

salt + hydrogen

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6
Q

Zn + NaOH =

A

Na2ZnO2 + H2

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7
Q

Al + NaOH =

A

NaAlO2 + H2

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8
Q

in electrolysis of acidified H2O, ___ rods are used

A

Pt

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9
Q

purest form of H2 is obtained from

A

electrolysis of Ba(OH)2 with Ni electrodes

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10
Q

Bosch’s process

A

C + H2O = CO + H2

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11
Q

catalyst of water gas shift

A

Fe2(CrO4)3

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12
Q

CO2 is absorbed by

A

Basic Salt
NaAsO2
sodium aresnite

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13
Q

CO is absorbed by

A

.ammoniacal cupurous chloride

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14
Q

Lane’s process

A

Fe + H2O = Fe2O4 + H2

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15
Q

preparation of dihydrogen

A
  1. laboratory
    i. metal + acid
    ii. amphoteric metal + base
  2. commercial
    i. electrolysis of H2O
    ii. hydrocarbon
    iii. electrolysis of Ba(OH)2
    iv. electolysis of brime
    v. lane’s process
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16
Q

bond dissassociation energy of H2 is

A

maximum among single bonded homo atoms

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17
Q

chemical reactions

A
  1. X
  2. O
  3. N
  4. Alkali metal
  5. as reducing agent
  6. unsturated H-C
  7. oxo-process
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18
Q

oxo-process

A

alkene + water gas in presence of Co = aldehyde

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19
Q

CO + H2 in presence of Co

A

CH3OH

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20
Q

types of hydride

A
  1. ionic
  2. covalent
  3. metallic
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21
Q

s-block metals forming covalent hydrides

A

LiH, BeH2, MgH2

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22
Q

______ hydrides exist in polymeric form

A

BeH2
MgH2
3 centered two electron bond
banana bond

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23
Q

hydrolith

A

CaH2

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24
Q

LiH + H2O =

A

no reaction due to covalent charachter

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25
types of covalent hydrides
1. electron deficient 2. electron precise 3. electron rich
26
bond energy of halides down the group
decreases
27
acidic strength of hydride down the group
increases
28
which d and f blocks element do not form metallic hydrides
group 7, 8, 9 | and group 6, only Cr forms hydride
29
oxidation state of M and H in metallic hydride is
0
30
hydrogen in metallic hydride exist in
in different lattice
31
_____ law is not followed by metallic hydride
law of constant composition
32
metallic hydrides conduct electricity
less effectively as compared to pure metal
33
______ elements can absorb lot of hydrogen thus used in its storage
Pd, Pt
34
NH3, HF, H2O, H2O2 (compare BP)
NH3 < HF < H2O < H2O2
35
H2O have high
``` dielectric constant heat capacity heat of fusion heat of vaporisation surface tension MP and BP ```
36
bond angle of H2O
104.5 degree
37
ice is a thermal
insulator | existence of aquatic life
38
densest water
4 degree C
39
ice has a _____ structure
hexagonal
40
2H2O = H3O+ + OH-
self-protolysis self-ionisation of water
41
heavy hydrogen
duterium
42
heavy water
D2O
43
H2O is trapped in the lattice of
BaCl2
44
all properties of D2O is greater than H2O but ______ property of D2O is less than of that of H2O
dielectric constant
45
hard water contains
bicarbonate / chloride / sulphate / nitrate salts of Mg and Ca
46
temperory hardness of water is due to
bicarbonate salts of Mg2+ and Ca2+
47
temperory hardness can be removed by
1. boiling | 2. clark's method
48
reagant used in clark's method
Ca(OH)2
49
percipitate formed in clark's method
CaCO3 , Mg(OH)2
50
ways to remove permanent hardness
1. keep on adding soap 2. using washing soda 3. calgon method 4. ion exchange method 5. synthetic resin method
51
reaction involved in washing soda way to remove permanent hardness
MSO4 + Na2CO3 = MCO3 + Na2SO4 MCl2 + Na2CO3 = MCO3 + NaCl M = Mg2+ or Ca2+
52
reagant for calgon method
sodium hexametaphosphate
53
sodium hexametaphosphate
Na6P6O18 | Na2[Na4(PO3)6]
54
commercial name of sodium hexametaphosphate
calgon
55
zeolite
Na Al Si O4 | sodium aluminiumsilicate
56
permulite another name
zeolite
57
synthetic resin method
hard water > cation exchange(acid resin) > acidic soft water > anion exchange > basic resin > demineralised neutral water
58
open book structure
H2O2
59
BaO2.8H2O + H2SO4
BaSO4 + H2O2
60
electrolysis of HSO4-
HO3S-O-O-SO3H > hydrolysis > H2O2 + H2SO4
61
structure of 2-ethylanthraquinol
C16H12O2
62
structure of 2-ethylanthraquinone
C16H12O2
63
industrial preparation of H2O2
auto-oxidation of 2-ethylanthraquinol
64
preparation of D2O2
K2S2O8 + D2O = KDSO4 + D2O2
65
H2O2 can act as
oxidising as well as reducing agent
66
H2O2 as reducing agent
converts into O2
67
H2O2 as a oxidising agent converts into
H2O
68
addition of ______ stabilizes H2O2
Urea, H3PO4, Glycerol, Acetanilide
69
D2O is formed by
exhaustive electrolysis of H2O | repetitive distillation and condensation
70
D2O is used ion nuclear reactor as
moderator
71
special forms of H2
1. atomic 2. nascent 3. adsorbed 4. nuclear isomer
72
types of nuclear isomer
ortho (same) para (opposite) difference in spin
73
more abundent nuclear hydrogen
ortho (75%) | 100% at 0K
74
most stable nuclear hydrogen
para
75
magnetic moment of para
zero
76
magnetic moment of ortho
twice that of proton
77
Fenton's Reagent
FeSO4 + H2O2

Hydrogen (1 decks)

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