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IIT JEE Chemistry Of Representative Elements
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IIT JEE Chemistry Of Representative Elements
1
.Lithium shows diagonal relationship with
A
Beryllium
B
Sodium
C
Magnesium
D
Calcium.
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✅ Correct Answer: 3
2
When calcium is heated in the flame of a Bunsen burner the colour imparted to the flame is
A
Golden yellow
B
Brick red
C
Crimson red
D
Grassy green.
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✅ Correct Answer: 2
3
Which of the following metals on reaction with excess oxygen forms superoxide?
A
Li
B
Na
C
Mg
D
K.
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✅ Correct Answer: 4
4
The most easily polarisable noble gas is
A
Krypton
B
Xenon
C
Helium
D
Argon.
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✅ Correct Answer: 2
5
Which of the following compounds has maximum covalent character?
A
LiF
B
LiCl
C
NaCl
D
CsCl.
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✅ Correct Answer: 4
6
The lightest alkali metal is
A
Lithium
B
Sodium
C
Rubidium
D
Caesium.
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✅ Correct Answer: 1
7
Potassium crystallizes in a body centred lattice. Hence the coordination number of potassium is
A
6
B
8
C
4
D
12
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✅ Correct Answer: 2
8
The colour imparted by lithium to the flame is
A
Golden yellow
B
Grassy green
C
Violet
D
Red.
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✅ Correct Answer: 4
9
The alkali metal with highest melting point is
A
K
B
Na
C
Cs
D
Li.
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✅ Correct Answer: 4
10
Natural gas is the richest source of
A
Helium
B
Neon
C
Argon
D
Xenon.
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✅ Correct Answer: 1
11
Which of the following reacts with excess oxygen to forma normal oxide?
A
Li
B
Na
C
K
D
Rb.
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✅ Correct Answer: 1
12
.Which among the following is insoluble in water?
A
LiOH
B
NaOH
C
KOH
D
RbOH.
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✅ Correct Answer: 1
13
The alkali metal that reacts with nitrogen directly to form nitride is
A
Na
B
K
C
Rb
D
Li.
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✅ Correct Answer: 4
14
Sapphire is a mineral of
A
Mg
B
Al
C
B
D
Au.
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✅ Correct Answer: 2
15
.Among the following the most stable hydride is
A
NaOH
B
LiH
C
KH
D
RbH.
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✅ Correct Answer: 2
16
Which of the following is the most abundant alkaline earth metal?
A
Be
B
Mg
C
Ca
D
Sr.
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✅ Correct Answer: 3
17
Which of the following compounds has the highest melting point?
A
LiCl
B
NaCl
C
KCl
D
CsCl.
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✅ Correct Answer: 2
18
A fire-work gives green colour. It possibly contains some salt of
A
Calcium
B
Barium
C
Strontium
D
Potassium.
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✅ Correct Answer: 2
19
.Which of the following elements has the highest density?
A
Mg
B
Na
C
K
D
Rb.
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✅ Correct Answer: 1
20
.Alkaline earth metal that resembles aluminium more than its congeners is
A
Be
B
Mg
C
Ca
D
Sr
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✅ Correct Answer: 1
21
.Which of the following halides has the maximum covalent character ?
A
CsI
B
KI
C
NaI
D
LiI.
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✅ Correct Answer: 4
22
.Which of the following metals has the highest melting point?
A
Li
B
Be
C
Na
D
Mg.
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✅ Correct Answer: 2
23
Alcohol dissolves in
A
LiCl
B
NaCl
C
KCl
D
RbCl.
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✅ Correct Answer: 1
24
Which hydroxide decomposes on heating?
A
NaOH
B
KOH
C
LiOH
D
RbOH.
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✅ Correct Answer: 3
25
.Which of the following oxides is amphoteric ?CaO
A
CaO
B
BaO
C
BeO
D
MgO.
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✅ Correct Answer: 2
26
Which among the following is least soluble in water?
A
NaF
B
KF
C
LiF
D
CsF.
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✅ Correct Answer: 3
27
Which of the following is the strongest reducing agent?
A
Be
B
Mg
C
Ca
D
Sr.
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✅ Correct Answer: 1
28
Which of the following is the weakest base ?
A
KOH
B
NaOH
C
LiOH
D
RbOH.
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✅ Correct Answer: 3
29
The most reactive alkali metal among the following is
A
Li
B
Na
C
Rb
D
Cs.
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✅ Correct Answer: 4
30
What is true about the oxoacids of halogens.
A
All of them are good reducing agents
B
All of them are monobasic
C
They may be monobasic as well as polybasic
D
They have general formula HXO.
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✅ Correct Answer: 2
31
Which halogen forms interhalogen compound but does not form polyhalide ion?
A
Fluorine
B
Bromine
C
Iodine
D
All of the above.
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✅ Correct Answer: 1
32
Which of the following does not contain iodine.
A
Tincture iodine
B
Caliche
C
Sea weeds
D
Carnallite.
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✅ Correct Answer: 4
33
Which of the following halogen is called super halogen?
A
Fluorine
B
Chlorine
C
Iodine
D
Bromine.
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✅ Correct Answer: 1
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