Which of the following species has four lone pairs of electrons? [ CBSE PMT 1993]
10%
a) I
40%
b) O-
40%
c) Cl-
10%
d) He
Q.2.
The element which liberate O2 from water is
22%
a) P
22%
b) N
22%
c) F
33%
d) I
Q.3.
Which one of the following oxyacids of chlorine is least oxidizing in nature? [ AIIMS 1994]
11%
a) HOCl
44%
b) HClO2
33%
c) HClO3
11%
d) HClO4
Q.4.
Hydrochloric acid at 25°C is .. [ Pb CET 1995]
14%
a) Ionic and liquid
71%
b) Covalent and liquid
14%
c) Ionic and gas
0%
d) None of above
Q.5.
The type of hybrid orbitals used by ClO2- is .. [ IIT 1992]
25%
a) sp3
62%
b) sp2
12%
c) sp
0%
d) None of these
Q.6.
Which of the following elements is extracted commercially by the electrolysis of an aqueous solution of its compound?
50%
a) Cl
17%
b) Al
17%
c) Br
17%
d) Na
Q.7.
HI can be prepared by all the following methods except.. [ CBSE PMT 1994]
29%
a) PI3 + H2O
43%
b) KI + H2SO4
29%
c) H2 + I2 in presence of Pt
0%
d) I2 + H2S
Q.8.
The element which never acts as reducing agent in a chemical reaction is [ Bihar CEE 1995]
17%
d) C
33%
a) O
17%
b) Li
33%
c) F
Q.9.
When cold NaOH reacts with Cl2 which of the following is formed
17%
a) NaClO
33%
b) NaClO2
33%
c) NaClO3
17%
d) None
Q.10.
When I2 is dissolved in CCl4 the colour that results is ... [ AFMC 1993]
0%
a) Brown
33%
b) Violet
50%
c) Colourless
17%
d) Bluish green
Q.11.
1.0 M solution of which of the following slats is most basic? [ DPMT 1994]
0%
a) NaClO
50%
b) NaClO4
33%
c) NaClO2
17%
d) NaClO3
Q.12.
Which of the following cannot work as oxidizing agent? [ CPMT 1996]
17%
a) O2
33%
b) KMnO4
17%
c) H2O2
33%
d) I-
Q.13.
Which one of the following can be purified by sublimation? [ AMU 1992]
29%
a) F2
14%
b) Cl2
14%
c) Br2
43%
d) I2
Q.14.
Charge distribution in iodine monochloride is best represented as [ IAS prelims 1993]
0%
a) I+ Cl-
67%
b) Iδ+ Clδ-
17%
c) I- Cl+
17%
d) Iδ- Clδ+
Q.15.
Which one of the following oxides of chlorine is obtained by passing dry chlorine over silver chlorate at 90&dgeC
17%
a) Cl2O
17%
b) ClO3
33%
c) ClO2
33%
d) ClO4
Q.16.
In the reaction HNO3 + HF → H2NO3- + F- base is .. [ Pb. CET 1995]
0%
a) HF
33%
b) HNO3
50%
c) HF and HNO3
17%
d) None
Q.17.
Amongst NO3-, AsO33-, CO32- , SO32- and BO33- the non planar species are .. [ GATE 1993]
0%
a) CO32-, SO32- and BO33-
33%
b) AsO33- , ClO3-, and SO32-
50%
c) NO3- , CO32-, and BO33-
17%
d) SO32- , NO3- , BOO33-
Q.18.
Halogen which can be prepared from caliche is .. [ haryana CEET 1994]
0%
a) Cl2
0%
b) Br2
33%
c) I2
67%
d) F2
Q.19.
Which among the following is paramagnetic? [ CBSE PMT 1994]
33%
a) Cl2O
33%
b) ClO2
17%
c) Cl2O7
17%
d) Cl2O6
Q.20.
Which is the weakest out of HF, HCl, HBr and HI? [ MP PMT 1995]
17%
a) HF
0%
b) HCl
17%
c) HBr
67%
d) HI
Q.21.
When excess of Chlorine reacts with NH3, products formed are..
17%
a) NH4Cl and N2
50%
b) NCl3 and HCl
17%
c) NCl3 and N2
17%
d) NH3 and N2
Q.22.
In which of the following, oxygen has +2 oxidation number? [ EAMCET 1986]
40%
a) F2O
20%
b) Cl2O
0%
c) Na2O2
40%
d) Na2O
Q.23.
Which of the following is the true oxide of iodine? [ MP PMT 1988]
20%
a) I2O4
20%
b) I2O5
40%
c) I2O7
20%
d) I2O9
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]
20%
a) Cl, Br, I
20%
b) I, Br, Cl
40%
c) Br, Cl, I
20%
d) I, Cl, Br
Q.25.
Of the sodium halides, NaF ha highest melting point because
20%
a) Fluorine has the highest electronegativity
60%
b) Fluorine has highest ionization energy than any other member of the halogen family
20%
c) NaF has the maximum ionic character
0%
d) NaF has the minimum ionic character
Q.26.
The outermost electronic configuration of the most electronegative element is [ IIT 1988]
40%
a) ns2 np3
0%
b) ns2 np4
60%
c) ns2 np5
0%
d) ns2 np6
Q.27.
Fluorine is stronger oxidising agent than chlorine in aqueous solution. This is attributed to many factors except [ Pb CET 1989]
20%
a) Heat of dissociation
20%
b) Electron affinity
40%
c) Ionization potential
20%
d) Heat of hydration
Q.28.
Which statement is correct about halogens? [ EAMCET 1991]
0%
a) They are all diatomic and form univalent ions
40%
b) They are all capable of exhibiting several oxidation states
40%
c) They are all diatomic and form divalent ions
20%
d) They can mutually displace each other from the solution of their compounds with metals
Q.29.
On boiling an aqueous solution of KClO3 with iodine the following product is obtained? [ NCERT 1980]
33%
a) KIO3
33%
b) KClO4
17%
c) KIO4
17%
d) KCl
Q.30.
Which of the following has greatest reducing power
33%
a) HI
17%
b) HBr
33%
c) HCl
17%
d) HF
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