Download self evaluation test on s AND p-BLOCK ELEMENTS with answers. and more Exercises Inorganic Chemistry in PDF only on Docsity!
1. Nitrogen can be obtained from air by removing
[AFMC 1998]
(a) Oxygen
(b) Hydrogen
(c) Carbon dioxide
(d) Both (a) and (c)
2
SO acts as temporary bleaching agent but
2
Cl
acts as permanent bleaching agent. Why [JEE Orissa 2004]
(a)
2
Cl bleaches due to reduction but
2
SO due to
oxidation
(b)
2
Cl bleaches due to reduction but
2
SO due to
reduction
(c) Both of these
(d) None of these
3. Caro's acid is [DCE 2002]
(a)
2 3
HSO (b)
3 2 5
HSO
(c)
2 5
HSO (d)
2 2 8
HSO
4. Inorganic benzene is [Pb. CET 2004]
(a)
3 3 3
BHN
(b)
3 3
BHNH
(c)
3 6 3
BHN (d)
3 3 6
HBN
5. Which of the following ions, will have maximum
hydration energy [Pb. CET 2003]
(a)
2
Sr (b)
2
Ba
(c)
2
Ca (d)
2
Mg
6. When orthophosphoric acid is heated to
600 C ,
o
the product formed is [CBSE PMT 1989]
(a) Phosphine,
3
PH
(b) Phosphorus pentoxide,
2 5
PO
(c) Phosphorus acid,
3 3
HPO
(d) Metaphosphoric acid,
3
HPO
7. The statement true for
3
N is [AIIMS 2004]
(a) It has a non-linear structure
(b) It is called pseudohalogen
(c) The formal oxidation state of nitrogen in this
anion is - 1
(d) It is isoelectronic with
2
NO
4 2 2 2
P 3 NaOH 3 HO A 3 NaHPO here, ' A ' is
[BVP 2004]
(a)
3
NH (b)
3
PH
(c)
3 4
HPO (d)
3 3
HPO
9. A hydride of nitrogen which is acidic is [MP PMT 2004]
(a)
3
NH
(b)
2 2
NH
(c) NH
3
(d)
2 4
NH
10. The ONO angle is maximum in [AIIMS 2004]
(a)
3
NO (b)
2
NO
(c)
2
NO (d)
2
NO
11. When ammonia is passed over heated CuO , it is
oxidised to [Roorkee 199
(a)
2
N
(b)
2
NO
(c) N O
2
(d)
2
HNO
12. Slaked lime is used in the manufacture of [MNR 1985]
(a) Cement (b) Fire bricks
(c) Pigment (d) Medicine
13. Which of the following is the most stable
[Roorkee Qualifying 1998]
(a)
2
Pb (b)
2
Ge
(c)
2
Si (d)
2
Sn
14. When
2
CO is bubbled through a solution of
barium peroxide in water [AFMC 2005]
(a)
2
O is released
(b) Carbonic acid is formed
(c)
2 2
HO is formed
(d) No reaction occurs
15. The lightest metal is [MP PET 2001]
(a) Li (b) Mg
(c) Ca (d) Na
16. Which of the following will not undergo
hydrolysis in water
[DPMT 2001]
(a) Ammonium sulphate
(b) Sodium sulphate
(c) Calcium sulphate
(d) All the salts will hydrolyse
17. The species that does not contain peroxide ion is
[DCE 2003]
(a)
2
PbO (b)
2 2
HO
(c)
2
SrO (d)
2
BaO
18. The number of hydroxide ions produced by one
molecule of sodium carbonate ( )
2 3
NaCO on
hydrolysis is
[AFMC 2000]
(a) 1 (b) 2
(c) 3 (d) 4
19. Lead is soluble in [BVP 2004]
(a) CHCOOH
3
(b)
2 4
HSO
(c) HCl
(d)
3
HNO
20. The difference of water molecules in gypsum and
plaster of paris is [CPMT 1997]
(a)
2
5
(b) 2
(c)
2
1
(d)
2
1
1
21. When burning magnesium ribbon is introduced
into a jar of oxygen, it produces [MH CET 1999]
(a)
Mg (b)
MgO
(c)
2
MgO (d)
2 2
MgO
22. Which of the following compounds transform
baking soda into baking powder [AIIMS 2001]
(a) KCl (b)
3
KHCO
(c)
3
NaHCO
(d)
4 4 6
KHCHO
23. Hydrated 3
AlCl is used as [RPET 2003]
(a) Catalyst in cracking of petroleum
(b) Catalyst in Friedel Craft reaction
(c) Mordant
(d) All of these
24. Which of the following ions has largest heat of
hydration
[MP PET 2001]
(a)
2
Ba (b)
K
(c)
Li (d)
2
Be
25. The hydroxides which sublime on heating are
[Roorkee 1999]
(a) LiOH (b) KOH
(c) RbOH (d)
2
Mg ( OH )
26. Electrolysis of KCl MgCl HO
2 2
.. 6 gives [KCET 1993]
(a) Mg Only
(b) Potassium only
(c) Mg and
2
Cl
(d) P and Mg
27. Which species does not exist [JIPMER 2000]
(a)
2
6
( SiCl ) (b)
2
6
( CCl )
(c)
2
6
( GeCl ) (d)
2
6
( SnCl )
2 3
AlO
formation involves evolution of a large
quantity of heat, which makes its use in [DPMT 2002]
(a) Deoxidiser
(b) Indoor photography
(c) Confectionary
(d) Thermite welding
29. Nitrates of all metals are [DCE 2000]
(a) Unstable (b) Stable
(c) Coloured (d) Soluble
30. The density of Neon will be highest at [JIPMER 2002]
(a) STP
(b)
0 C , 2
o
atmosphere
(c) 273 C , 1
o
atmosphere
(d) 273 C , 2
o
atmosphere
31. When chlorine water is exposed to sunlight the
colour change that occurs is [ Kerala (Med
(a) Colourless to brown
(b) Brown to colourless
(c) Light blue to colourless
(d) Colourless to greenish yellow
(e) Greenish yellow to colourless
32. Sodium nitrate
3
NaNO decomposes above
C
o
~ 800 to give [IIT 1998]
(a)
2
N (b)
2
O
(c)
2
NO (d) NaO
2
2
N forms
3
NCl , whereas P can form both
5
PCl
and
5
PCl. Why [JEE Orissa 2004]
23. (c) Hydeated 3
AlCl in used as mordant.
24. (d)
Be Li Ba K
2 2
decreasing order of heat of hydration.
25. (d)
2
Mg ( OH )
sublimes on heating.
26. (c) 2
Electroly sis
2 2
KCl. MgCl. 6 HO Mg & Cl
K e K
; E V
o
2. 93
Mg e Mg
2
; E V
o
2. 37
Since, reduction potential of Mg
is higher.
Hence it gets reduced easily.
27. (b)
6
CCl does not exist because carbon has a
valancy of 4.
28. (a) In thermite welding large quantity of heat is
used which is evolved during
2 3
AlO
formation.
29. (b) Generally all metal nitrates are stable. 30. (b) Density of Neon will be highest as
C
o
0 , 2
atmosphere.
31. (e)
Colourless
Greenish yellow
2 2
Cl HO Product
32. (a) 2 2 () 2 2
800
3
NaNO NaNO O g
C
o
33. (a) P has low lying 3 d orbitals, which can be used
for bonding, where as
2
N does not have low
lying 3 d orbitals.
