MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
NEET
NEET Chemistry MCQ
Halogen Family Mcq Neet Chemistry
Quiz 3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Q.1
Which of the following species has four lone pairs of electrons? [ CBSE PMT 1993]
0%
a) I
0%
b) O-
0%
c) Cl-
0%
d) He
Explanation
Outer electron configuration of Cl- is 3s2 3px2 3py2 3pz2 Answer: (c)
Q.2
The element which liberate O2 from water is
0%
a) P
0%
b) N
0%
c) F
0%
d) I
Explanation
F reacts strongly with H2O to give mixture of O2 and O3 2F2 + 2H2O → 4HF + O2 3F2 + 3H2 → 6HF + O3 Answer: (c)
Q.3
Which one of the following oxyacids of chlorine is least oxidizing in nature? [ AIIMS 1994]
0%
a) HOCl
0%
b) HClO2
0%
c) HClO3
0%
d) HClO4
Explanation
Greater the oxidation number of Cl greater the acidic character lower the oxidizing nature Answer:(d)
Q.4
Hydrochloric acid at 25°C is .. [ Pb CET 1995]
0%
a) Ionic and liquid
0%
b) Covalent and liquid
0%
c) Ionic and gas
0%
d) None of above
Explanation
Answer: (b)
Q.5
The type of hybrid orbitals used by ClO2- is .. [ IIT 1992]
0%
a) sp3
0%
b) sp2
0%
c) sp
0%
d) None of these
Explanation
Total valence electron in ClO2- is 7+6+6+1=20 Now 20 ÷ 8 = 2(Q1 + 4(R2 R1 ÷ 2 = 4/2 = 2 (R2) Total of Q1 and R2 = 2+2 Thus sp3 Answer: (a)
Q.6
Which of the following elements is extracted commercially by the electrolysis of an aqueous solution of its compound?
0%
a) Cl
0%
b) Al
0%
c) Br
0%
d) Na
Explanation
By electrolysis of NaCl solution Cl2 is produced Answer: (a)
Q.7
HI can be prepared by all the following methods except.. [ CBSE PMT 1994]
0%
a) PI3 + H2O
0%
b) KI + H2SO4
0%
c) H2 + I2 in presence of Pt
0%
d) I2 + H2S
Explanation
H2SO4 is a strong oxidising agent, it will oxidise HI to iodine 2HI + H2SO4 → SO2 + I2 + 2H2O Answer:(b)
Q.8
The element which never acts as reducing agent in a chemical reaction is [ Bihar CEE 1995]
0%
d) C
0%
a) O
0%
b) Li
0%
c) F
Explanation
Fluorine due to its highest electronegativity is strongest oxidising agent , hence can never acts as reducing agent Answer: (c)
Q.9
When cold NaOH reacts with Cl2 which of the following is formed
0%
a) NaClO
0%
b) NaClO2
0%
c) NaClO3
0%
d) None
Explanation
2NaOH (dil) + Cl2 → NaClO + NaCl + H2O Answer: (a)
Q.10
When I2 is dissolved in CCl4 the colour that results is ... [ AFMC 1993]
0%
a) Brown
0%
b) Violet
0%
c) Colourless
0%
d) Bluish green
Explanation
Iodine doesn't react with CCl₄, it dissolves in it. Solutions of Iodine in non-polar solvents, like CCl₄, are purple/violet in color, while solutions in polar solvents, like ethanol, are brown in color. Answer: (b)
Q.11
1.0 M solution of which of the following slats is most basic? [ DPMT 1994]
0%
a) NaClO
0%
b) NaClO4
0%
c) NaClO2
0%
d) NaClO3
Explanation
Lower the oxidation number after not considering the negative sign, stronger is the base Answer:(a)
Q.12
Which of the following cannot work as oxidizing agent? [ CPMT 1996]
0%
a) O2
0%
b) KMnO4
0%
c) H2O2
0%
d) I-
Explanation
Is a weak reducing agent Answer: (d)
Q.13
Which one of the following can be purified by sublimation? [ AMU 1992]
0%
a) F2
0%
b) Cl2
0%
c) Br2
0%
d) I2
Explanation
Answer: (d)
Q.14
Charge distribution in iodine monochloride is best represented as [ IAS prelims 1993]
0%
a) I+ Cl-
0%
b) Iδ+ Clδ-
0%
c) I- Cl+
0%
d) Iδ- Clδ+
Explanation
Cl is more electronegative carry small negative charge Answer: (b)
Q.15
Which one of the following oxides of chlorine is obtained by passing dry chlorine over silver chlorate at 90&dgeC
0%
a) Cl2O
0%
b) ClO3
0%
c) ClO2
0%
d) ClO4
Explanation
2AgClO3 + Cl2 → 2AgCl + 2ClO2 + O2 Answer:(c)
Q.16
In the reaction HNO3 + HF → H2NO3- + F- base is .. [ Pb. CET 1995]
0%
a) HF
0%
b) HNO3
0%
c) HF and HNO3
0%
d) None
Explanation
HNO3 accept proton to form HNO3+ Answer: (b)
Q.17
Amongst NO3-, AsO33-, CO32- , SO32- and BO33- the non planar species are .. [ GATE 1993]
0%
a) CO32-, SO32- and BO33-
0%
b) AsO33- , ClO3-, and SO32-
0%
c) NO3- , CO32-, and BO33-
0%
d) SO32- , NO3- , BOO33-
Explanation
Ions in option(b) have sp3 hybridization of central atom Answer: (b)
Q.18
Halogen which can be prepared from caliche is .. [ haryana CEET 1994]
0%
a) Cl2
0%
b) Br2
0%
c) I2
0%
d) F2
Explanation
Caliche is a lat petre ) NaNO3 and contains about 0.3% of I2 as NaIO3 Answer: (c)
Q.19
Which among the following is paramagnetic? [ CBSE PMT 1994]
0%
a) Cl2O
0%
b) ClO2
0%
c) Cl2O7
0%
d) Cl2O6
Explanation
ClO2 contains 7 +12 = 19 valence electrons. which is an odd number. Hence it is paramagnetic in nature Answer:(b)
Q.20
Which is the weakest out of HF, HCl, HBr and HI? [ MP PMT 1995]
0%
a) HF
0%
b) HCl
0%
c) HBr
0%
d) HI
Explanation
HF do not get fully ionized in water due to strong bonding Answer: (a)
Q.21
When excess of Chlorine reacts with NH3, products formed are..
0%
a) NH4Cl and N2
0%
b) NCl3 and HCl
0%
c) NCl3 and N2
0%
d) NH3 and N2
Explanation
NH3 + 3 Cl2( excess) → NCl3 + 3HCl Answer: (b)
Q.22
In which of the following, oxygen has +2 oxidation number? [ EAMCET 1986]
0%
a) F2O
0%
b) Cl2O
0%
c) Na2O2
0%
d) Na2O
Explanation
Answer: (a)
Q.23
Which of the following is the true oxide of iodine? [ MP PMT 1988]
0%
a) I2O4
0%
b) I2O5
0%
c) I2O7
0%
d) I2O9
Explanation
Answer:(b)
Q.24
Which of the following arrangement for the three halogens Cl, Br and I when placed in the order of their increasing electron affinity is correct? [ CPMT 1990]
0%
a) Cl, Br, I
0%
b) I, Br, Cl
0%
c) Br, Cl, I
0%
d) I, Cl, Br
Explanation
Answer: (b)
Q.25
Of the sodium halides, NaF ha highest melting point because
0%
a) Fluorine has the highest electronegativity
0%
b) Fluorine has highest ionization energy than any other member of the halogen family
0%
c) NaF has the maximum ionic character
0%
d) NaF has the minimum ionic character
Explanation
Answer: (c)
Q.26
The outermost electronic configuration of the most electronegative element is [ IIT 1988]
0%
a) ns2 np3
0%
b) ns2 np4
0%
c) ns2 np5
0%
d) ns2 np6
Explanation
Answer: (c)
Q.27
Fluorine is stronger oxidising agent than chlorine in aqueous solution. This is attributed to many factors except [ Pb CET 1989]
0%
a) Heat of dissociation
0%
b) Electron affinity
0%
c) Ionization potential
0%
d) Heat of hydration
Explanation
Ionization potential is related with removal of electron that is reducing agent. While F is strong oxidising agent electron acceptor Answer:(c)
Q.28
Which statement is correct about halogens? [ EAMCET 1991]
0%
a) They are all diatomic and form univalent ions
0%
b) They are all capable of exhibiting several oxidation states
0%
c) They are all diatomic and form divalent ions
0%
d) They can mutually displace each other from the solution of their compounds with metals
Explanation
Answer: (a)
Q.29
On boiling an aqueous solution of KClO3 with iodine the following product is obtained? [ NCERT 1980]
0%
a) KIO3
0%
b) KClO4
0%
c) KIO4
0%
d) KCl
Explanation
ClO3- ion being an oxidising agent oxidise I2 to IO3- ion and itself gets reduced to Cl2 Answer: (a)
Q.30
Which of the following has greatest reducing power
0%
a) HI
0%
b) HBr
0%
c) HCl
0%
d) HF
Explanation
Answer: (a)
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page