問題一覧
1
LiCO3 on heating gives?
Li2O + CO2
2
H2CO3 decomposes in?
aqueous solution , normal temperature
3
CaCO3.MgCO3 --∆--> ?
CaO + MgO + (2)CO3
4
Final products of heating of CuSO4.5H2O? (T~750°C)
CuO + SO3
5
Final products of heating of CuSO4.5H2O? (T>800°C)
CuO + SO2 + O
6
compounds of which metal changes their oxidation state on heating?
Fe, Mn
7
Nitrate of which metal forms complex on heating?
Be
8
K2SO4.Al2(SO)3.24H2O on heating gives?
K2SO4 + Al2O3 + SO3
9
CuSO4.5H2O --∆-> A.H2O --∆-> B --∆-> C + SO3. Colour of B and C?
white, black
10
FeSO4.7H2O on heating gives
Fe2O3 + SO2 + SO3
11
CaSO4.2H2O -∆-> A.(1/2)H2O -∆-> B -∆-> C + SO3.... Name of A and B
Plaster of paris, dead burn plaster
12
LiNO3 on heating gives?
Li2O + NO2 + (1/2)O2
13
Basic beryllium nitrate on heating forms a complex with formula?
[Be4O(NO3)6]
14
Yellow messicote on heating becomes?
red, litharge
15
ZnO on heating turns?
white to yellow
16
Pb2O4 --∆--> PbO + O..... Colour of Pb2O4 and PbO are?
reddish brown to red
17
Butterfly compound on heating produce A and (1/2)O2... Formula,nature and colour of A?
Cr2O3, amphoteric, green
18
HgO on heating turns
yellow to red
19
Heating what produces water, NO2, O-atom?
conc. HNO3
20
Heating what produces water, NO, O-atom
dil. HNO3
21
H2SO4 on heating gives? (T~444°)
H2O + SO3
22
H2SO4 on heating gives ? (T~800°C)
H2O + SO2 + O
23
HNO2 on heating gives?
3HNO2 --> H2O + 2NO + HNO3
24
H3PO2 on heating gives?
2H3PO2 --> H3PO4 + PH3
25
H3PO3 on heating gives?
4H3PO3 --> 3H3PO4 + PH3
26
H2SO3 on heating gives
3H2SO3 --> 2H2SO4 + S⬇️ + H2O
27
H3PO4 --∆--> A --∆--> B --∆--> C.... Name compound which forms polymer
B, metaphosphotic acid
28
H3PO4 --∆--> A --∆--> B --∆--> C.... Name of A and formula of C?
Pyrophosphoric acid, P2O5
29
H3PO4 --∆--> A --∆--> B --∆--> C..... Formula of A
H4P2O7
30
H3BO3 --∆--> A --∆--> B --∆--> C..... Compound which form polymer?
A, Metaboric acid, HBO2
31
No of sigma bonds in metaphosphoric acid if n = 4
20
32
H3PO4 --∆--> A --∆--> B --∆--> C..... No of sigma bonds of anion of B if value of n is 3
12
33
If anion is oxidising agent, NH4(+) can form?
N2, N2O
34
If anion is not oxidising agent NH4(+) on heating forms?
NH3
35
(NH4)2Cr2O7 on heating gives?
Cr2O3 + 4H2O + N2
36
NH4NO3 on heating gives?
N2O + 2H2O
37
NH4NO2 on heating gives?
N2 + 2H2O
38
NH4IO3 on heating gives?
2NH4IO3 ----> I2 + 4H2O + N2 + O2
39
(NH4)2SO4 on heating gives
NH3 + H2O + SO3
40
Chloride of which metal does not give chloride?
Hg
41
HgI2 on heating turns
Red to yellow
42
FeCl3 on heating produces?
FeCl2 + Cl
43
AuCl3 on heating gives
Au + 2Cl
44
Hg2Cl2 on heating gives?
HgCl2 + Hg
45
NH4Cl on heating gives
NH3 + HCl
46
which of the following hydrolyse?
MgCl2.6H2O
47
CaCl2.62O --> CaCl2.4H2O --> CaCl2.2H2O -->CaCl2.... Colour of these salts respectively?
pink, blue, red, blue
48
Heating KMnO4 gives?
K2MnO4 + MNO2 + O2
49
Heating PbCl4 gives?
PbCl2 + Cl2
50
Heating PbBr4 gives?
PbBr2 + Br2
51
Heating FeCl3.6H2O gives?
Fe2O3 + HCl + H2O
52
M(OAc) on heating gives?
MCO3 + CH3COCH3
53
HCO2Na gives?
Na2C2O4 + H2
54
Colour of NO2(-) and NO3(-) is?
Brown
55
Colour of Br(-) is ?
Reddish brown
56
Colour of I(-) is?
Violet
57
In preparation of soda extract insoluble salt and sodium carbonate is taken in ratio of?
1:3
58
Before performing test of anion, soda extract is neutralised with suitable acid?
To end the basic effect of sodium ion, To get rid of interrupting carbonate anion
59
In carbonate anion's test with dil. HCl which of the following is formed?
NaCl + H2O + CO2
60
In lime water test which of the following is formed?
white turbidity of CaCO3
61
Lime water test is possible of identification of?
CO2, SO2
62
If CO2 is taken in excess in lime water test a soluble compound is formed
Ca(HCO3)2
63
When SO2 is taken in excess which compound is formed?
Ca(HSO3)2
64
Name A and B
slaked lime, lime water
65
CO3(2-) + CaCl2 gives
white ppt, CaCO3
66
CO2 + Ca(OH)2 gives
H2O + CaCO3
67
KMnO4 + H2SO4 ---> ?(when SO2 is passed)
MnSO4 + K2SO4 + H2O + O
68
When SO2 is passed through acidify KMnO4?
Pink colour of solution turns colourless
69
Orange colour of K2Cr2O7 + H2SO4 produces ?(on passing SO2)
Cr2(SO4)3 (green) + K2SO4 + H2O + O
70
Na2CO3 + BaCl2 --> A(ppt) + B.... Name and colour of A
BaCO3, white
71
Pb(NO3)2 + Na2CO3 ---> A(ppt) + B.... Formula and colour of A
PbCO3, white
72
Hg2(NO3)2 + Na2CO3 ---> A(ppt) + B..... Formula and colour of A?
Hg2CO3, yellow
73
AgNO3 + Na2CO3 ---> A(ppt) + B.... A?
Ag2CO3, y/w
74
HgCl2 + Na2CO3 ---> A(ppt).... A?
HgCO3.3Hgo, reddish brown
75
Hg2O on heating show disproportionation reaction as?(due to inert pair effect)
HgO + Hg
76
Ag2CO3 soluble in aqueous ammnia gives explosion due to formation of?
fulminating silver, Ag3N
77
Amphoteric metals are soluble in?
acids, bases
78
Ag(+) + CN(-) --->
[Ag(CN)2](-)
79
Ag(+) + NH4OH --->
[Ag(NH3)2](+)
80
Ag(+) + S2O3(2-) -->
[Ag(S2O3)2](3-)
81
Ag(+) salt soluble in?
CN(-), S2O3(2-), HNO3, aq NH4OH
82
Order of solubility in aqueous NH3? 1) AgCl 2) AgBr 3) AgI
1>2>3
83
Heating AgCO3 in aq suspension?
Ag2O + CO2
84
On heating Ag2CO3 (dry) ?
Ag + CO2 + 1/2O2
85
Bi carbonate of which exists in solid state?(rest all solution state)
Na
86
Carbonates of I A group are more soluble then bicarbonates because?
no H-bonding
87
On heating KHCO3 followed by BaCl2 finally gives ppt?
BaCO3, white
88
Test of bicarbonate with NH4OH followed by MgCl2 gives?
MgCO3, white
89
BaCl2 test is for ?
Both
90
Phenophthalein on mixing with a solution turns pink. solution contains?
CO3(2-)
91
Salts which give ppt with CO3 and solution with HCO3-?
BaCl2, CaCl2, Pb(NO3)2, HgCl2, Hg2(NO3)2
92
Test of sulphite with acid releases?
SO2 gas
93
Na2SO4 + BaCl2 --> A(ppt) + B.... formula and colour of A?
BaSO3, white
94
On standing BaSO3 what happens?
BaSO4(dense white)
95
Conversion of BaSO3 to BaSO4 can be fastened by adding?
Br2 + H2O, HNO3, H2O2
96
BaSO4 due to high lattice enthalpy is soluble in ?
conc. H2SO4
97
Na2SO4 + Pb(NO3)2 ---> A(ppt) + B.... A?
PbSO3, white
98
SO3(2-) + AgNO3 ----> A ----> B..... Formula of A?
[AgSO3](-)
99
SO3(2-) + AgNO3 ----> A ----> B..... A when boiled forms?
Ag(ppt) + SO4(-) + SO2(gas)