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CHEMISTRY
TOPIC : S BLOCK ELEMENTS, HYDROGEN & ITS COMPOUNDS
1.
H
+
does not exist freely because loss of electron from hydrogen results the size of
nucleus nearly  pm size, with high charge density.
2.
Decreasing order of
H
i
for Li, F and H is
3.
After cool gasification to increase production of dihydrogen ‘COof syngas is
reacted with steam in the pressure of catalyst this process is called
reaction
4.
In atomic hydrogen touch, atomic hydrogen atoms are allowed to combine on the
surface to be welded to generate a temperature of
5.
Among alkali metals , alkaline earth metals hydrides , number hydrides with
significant covalent character are and that are polymeric are
6.
Among alkali metal hydrides is rather unreactive forwards
at moderate temperatures.
O
2
and
Cl
2
7.
Among d and f block groups , and do not form hydrides. This is called
hydrides gap. Eve n from group 6
th
is the only element that form
hydride.
8.
Among interstitial hydrides except for the hydrides of , ,
and other hydrides have lattice different from parent metal.
9.
‘P’ cannot form
PH
5
because of high value of dihyd rogen and
value of hydrogen don’t favour to exhibit highest oxidation state of ‘n’.
10.
In Ice each oxygen atom is surrounded by 4 oxygen atoms tetrahedral at distance
of pm .
11.
The number of possible hydrogen molecules formed from its isotopes is
12.
If 11.1 mg of CaCl
2
and 12mg of MgSO
4
are present in 2 litres of water its
hardness is
13.
A 1 litre sample of hard water contained equal weight of
MgCl
2
, CaSO
4
, Ca(HCO
3
)
2
and MgSO
4
(in mgs). The increasing order of hard ness is
14.
Number of H -bonds are associated with each water molecule in ice is
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15.
K
3
Fe
(
CN
)
6
+ KOH + H
2
O
2
A + H
2
O + O
2
.
Th
e
total
numb
e
r
of
ions
g
i
ve
n
by
‘A’
its
aqueous solution is
16.
Among
ZnSO
4
, AlCl
3
, SnCl
2
, MgSO
4
, CaCl
2
, AgNO
3
number of salts that form
precipitate with
NaOH
(
aq
)
but dissolves in excess of aq. NaOH is
17.
White phosphorous undergoes reduction with NaOH the magnitude of oxidation
state of phosphorous in the redu ced state is x. The value of x is
18.
Na
+
, K
+
, Mg
+
2
& Ca
+
2
perform biological functio n such as maintainance of
balance and impulse conduction.
19.
During the conversion of one mole of gypsum to one mole of plaster of pairs the
percentage loss in weight is
20.
CaO
+
3
C
3
273
C
+
CO
.
In
compound
x
sum
of
and
bonds
21.
Which among al kali metals emit radiation in visible region above 700 nm
22.
Sodium metal is used to make a lloy needed to make and
23.
Molecules that are polymeric (n > 2) in nature and also contain 2e-3 centred bond
Beryllium hydride, Beryllium chloride , Alum inium chl oride, Boron trichloride ,
diborane
24.
In blood plasma Nais present in to the extent of m mol is where as
potassium is m. mol
L
1
.
25.
Raw cement formed is called which is then mixed with % by weight
gypsum.
26.
Port land cement contai n dicalcium silicate % trical cium silicate %,
and trical cium aluminate % and % of gypsum to the process of
setting only
27.
K
2
CO
3
can’t be prepared by solvay process due to
28.
Be & Al does not attacked by acids due to the formation of
29.
The alkaline earth metal shows a apple green colour in flame test
30.
Electrolysis of molten Na H gives a H
2
gas at
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CHEMISTRY
TOPIC : S BLOCK ELEMENTS, HYDROGEN & ITS COMPOUNDS
1 . 1.510
3
Pm
2.
. F > H > di
3.
. i ron chromate , water gas shift R n
4 . 4000 K
5.
. 3 Li H, BeH
2
, MgH
2
and 2 B eH
2
& MgH
2
6.
. Li H
7.
. 7 ,8 ,9 , Chrom ium
8.
. Ni, Pd , Ce and Ac
9.
.
H
a
and H
eg
10 . 276 Pm
11 . 6
12 . 10
13 . Ca(HCO
3
)
2
CaSO
4
MgSO
4
MgCl
2
14 . 4
15 . 5
16 . 3
17 . 3
18 . ion , nerve
19 . 15 .7
20 . 3
21.
. K and Rb
22.
. Pb/ Na alloy, Pb Et
4
and Pb Me
4
23.
. Beryllium hydride
onl y 24 . 143 , 5
25 . Clinker, 2 - 3 %
26 . 51 , 11 , 2 - 3 , slowdown
27 . high solubility of
28 . thin film of oxide
29 . Barium or Ba
30 . Anode
KHCO
3

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CHEMISTRY TOPIC : S BLOCK ELEMENTS, HYDROGEN & ITS COMPOUNDS 1. H + does not exist freely because loss of electron from hydrogen results the size of nucleus nearly  pm size, with high charge density. 2. Decreasing order of Hi for Li, F and H is 3. After cool gasification to increase production of dihydrogen ‘CO’ of syngas is reacted with steam in the pressure of catalyst this process is called reaction 4. In atomic hydrogen touch, atomic hydrogen atoms are allowed to combine on the surface to be welded to generate a temperature of 5. Among alkali metals , alkaline earth metals hydrides , number hydrides with significant covalent character are 6. and that are polymeric are Among alkali metal hydrides is rather unreactive forwards O2 and Cl2 at moderate temperatures. 7. Among d and f block groups , and hydrides gap. Eve n from group 6 th do not form hydrides. This is called is the only element that form hydride. 8. Among interstitial hydrides except for the hydrides of and 9. , other hydrides have lattice different from parent ‘P’ cannot form PH5 because of high , metal. value of dihyd rogen and value of hydrogen don’t favour to exhibit highest oxidation state of ‘n’. 10. In Ice each oxygen atom is surrounded by 4 oxygen atoms tetrahedral at distance of pm . 11. The number of possible hydrogen molecules formed from its isotopes is 12. If 11.1 mg of CaCl2 and 12mg of MgSO4 are present in 2 litres of water its hardness is 13. A 1 litre sample of hard water contained equal weight of MgCl2 , CaSO4 , Ca(HCO3 )2 and MgSO4 (in mg’s). The increasing order of hard ness is 14. 11 Number of H -bonds are associated with each water molecule in ice is 1| Page 15. K 3  Fe ( CN )6  + KOH + H 2O2 → A + H 2 O + O2 . The total number of ions given by ‘A’ its aqueous solution is 16. Among ZnSO4 , AlCl3 , SnCl2 , MgSO4 , CaCl2 , AgNO3 number of salts that form precipitate with 17. NaOH(aq) but dissolves in excess of aq. NaOH is White phosphorous undergoes reduction with NaOH the magnitude of oxidation state of phosphorous in the redu ced state is –x. The value of x is 18. Na+ , K + , Mg +2 & Ca+2 perform biological functio n such as maintainance of balance and 19. impulse conduction. During the conversion of one mole of gypsum to one mole of plaster of pairs the percentage loss in weight is 20. 273 CaO + 3C ⎯3⎯ ⎯ → C + CO . In compound x sum of 21. Which among al kali metals emit radiation in visible region above 22. Sodium metal is used to make 23. Molecules that are polymeric (n > 2) in nature and also contain Beryllium hydride, Beryllium and bonds a lloy needed to make 700 nm and 2e-3 centred bond chloride , Alum inium chl oride, Boron trichloride , diborane 24. In blood plasma “Na” is present in to the extent of potassium is 25. m. mol m mol is where as L−1 . Raw cement formed is called which is then mixed with % by weight gypsum. 26. Port land cement contai n dicalcium silicate and trical cium aluminate % and % trical cium silicate % of gypsum to %, the process of setting only 27. K2CO3 can’t be prepared by solvay process due to 28. Be & Al does not attacked by acids due to the formation of 29. The alkaline earth metal 30. Electrolysis of molten Na H gives a 11 shows a apple green colour in flame test H2 gas at 2| Page CHEMISTRY TOPIC : S BLOCK ELEMENTS, HYDROGEN & ITS COMPOUNDS 1. 1.510−3 Pm 2. 3. 4. 5. 6. 7. 8. . F > H > di . i ron chromate , water gas shift 4000 K . 3 Li H, BeH 2 , MgH 2 and 2 B eH 2 & MgH 2 . Li H . 7 ,8 ,9 , Chrom ium . Ni, Pd , Ce and Ac 9. . and H eg H R n a 10 . 11 . 12 . 13 . 276 Pm 6 10 Ca(HCO3 )2  CaSO4  MgSO4  MgCl2 14 . 4 15 . 5 16 . 3 17 . 3 18 . ion , nerve 19 . 15 .7 20 . 3 21. . K and Rb . Pb/ Na alloy, Pb Et 4 and Pb Me 4 22. 23. . Beryllium hydride onl y 24 . 143 , 5 25 . Clinker, 2 - 3 % 26 . 51 , 11 , 2 - 3 , slowdown 27 . high solubility of KHCO3 28 . 29 . 30 . 11 thin film of oxide Barium or Ba Anode 3| Page Name: Description: ...
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