Q.1
The comparatively high b.p. of HF is due to .. [ Kerala MEE 2001]
  • a) High reactivity of fluorine
  • b) Small size of hydrogen atom
  • c) Formation of hydrogen bonds and consequent association
  • d) Small size of fluorine atom
Q.2
Which of the following statement is not true? [ CBSE PMT 2003]
  • a) Among halide ions, iodide is the most powerful reducing agent
  • b) Fluorine is the only halogen that does not show a variable oxidation state
  • c) HOCl is a stronger acid than HOBr
  • d) HF is a stronger acid than HCl
Q.3
Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that ... [ AIEEE 2003]
  • a) Oxygen in air reacts with the emitted HCl gas to form a cloud of chlorine
  • b) Strong affinity of HCl gas for moisture in air results in forming of droplets of liquid solution which appears like a clouds smoke
  • c) Due to strong affinity for water, conc HCl pulls moisture of air towards itself. This moisture forms droplets of water and hence the cloud
  • d) Concentrated HCl emits strongly smelling HCl gas all the time
Q.4
Which of the following elements exhibits the most basic properties? [ MP PMT 2001]
  • a) F
  • b) Cl
  • c) Br
  • d) I
Q.5
Which of the following is most volatile?
  • a) HI
  • b) HBr
  • c) HCl
  • d) HF
Q.6
Bleaching powder is obtained by treating Cl2 with [ Pb. PMT 1999]
  • a) CaO
  • b) CaCO3
  • c) CaOCl2
  • d) Ca(OH)2
Q.7
The halogen that is most easily reduced is .. [ MP PMT 2000]
  • a) F2
  • b) Cl2
  • c) Br2
  • d) I2
Q.8
The bond energies of F2, Cl2, Br2 and I2 are 37, 58, 46 and 36 kcal mol- respectively. the strongest bond is present in ... [ AIIMS 2001]
  • a) Br2
  • b) I2
  • c) Cl2
  • d) F2
Q.9
Fluorine molecule is formed by ... [ Kerala MEE 2001]
  • a) The axial p-p orbital overlap
  • b) The sideways p-p orbital overlap
  • c) The s-s orbital overlap
  • d) ThE s-p orbital overlap
Q.10
Mark the element which displaces three halogens from their compounds [ BHU 1998]
  • a) F
  • b) Cl
  • c) Br
  • d) I
Q.11
Which of the following represents the correct order of increasing pKa values of the given acids? [ IAS prelims 1993]
  • a) HClO4 < HNO3 < H2CO3 < B(OH)3
  • b) HNO3 < HClO4 < B(OH)3 < H2CO3
  • c) B(OH)3 < H2CO3 < HClO4 < HNO3
  • d) HClO4 < HNO3 < HClO4 < HNO3
Q.12
When chlorine is passed over dry slaked lime at room temperature, the main reaction product is [ CBSE PMT 1992]
  • a) Ca(ClO2)2
  • b) CaCl2
  • c) CaOCl2
  • d) Ca(OCl)2
Q.13
Which one of the following is most basic [ AFMC 1994]
  • a) F-
  • b) Cl-
  • c) Br-
  • d) I-
Q.14
the shape of IF7 molecule is [ EAMCET 1994]
  • a) Octahedral
  • b) tetrahedral
  • c) Trigonal bipyramidal
  • d) Pentagonal bipyramidal
Q.15
Hydrogen bonding does not play any role in boiling of
  • a) NH3
  • b) H2O
  • c) HI
  • d) C2H5OH
Q.16
Arrange the acids (I)H2SO3 (II) H3PO3 (III) HClO3 in the decreasing order of acidity
  • a) I > III > II
  • b) I > II > III
  • c) III > I > II
  • d) II > III > I
Q.17
Glass reacts with HF to produce .. [ EAMCET 1994]
  • a) Na3AlF6
  • b) H2SiF6
  • c) H2SiO3
  • d) SiF4
Q.18
Hydrogen iodide can not be prepared by the action of Con H2SO4 on potassium iodide because [ Bihar CEE 1995]
  • a) HI is stronger than H2SO4
  • b) HI is more volatile than H2SO4
  • c) H2SO4 is an oxidising agent
  • d) H2SO4 forms complex
Q.19
On oxidation with iodine sulphite ion is transformed to ... [ CPMT 1992]
  • a) S4O62-
  • b) S2O62-
  • c) SO42-
  • d) SO32-
Q.20
A solution of potassium bromide is treated with each of the following. Which one would liberate bromine? [ CBSE PMT 1993]
  • a) Hydrogen iodide
  • b) Sulphur dioxide
  • c) Chlorine
  • d) Iodine
Q.21
Which of the following pairs will give chlorine gas most quickly, upon reaction? [ DEC 1994]
  • a) HCl and KMnO4
  • b) NaCl and H3PO4
  • c) NaCl and MnO2
  • d) CaCl2 and Br2
Q.22
In the reaction 3Br2 + 6CO32- + 3H2O → 5Br- + BrO3- + 6HCO3-
  • a) Bromine is oxidised and carbonate is reduced
  • b) Bromine is both oxidised and reduced
  • c) Bromine is reduced and water is oxidised
  • d) Bromine is neither oxidised nor reduced
Q.23
Fluorine is better oxidising agent than BrIt is due to ... [ EAMCET 1992]
  • a) Small size of fluorine
  • b) More electron repulsion in fluorine
  • c) More electronegativity of fluorine
  • d) Non metallic nature of fluorine
Q.24
Ozonised oxygen can be obtained from H2O by the action of ... [ Haryana CEET 1994]
  • a) Conc. H2SO4
  • b) KMnO4
  • c) MnO42-
  • d) F2
Q.25
Which one of the following elements can have both positive and negative oxidation state? [ AFMC 1994]
  • a) F
  • b) I
  • c) Li
  • d) He
Q.26
he formula for calcium chlorite is .. [ CBSE PMT 1996]
  • a) Ca(ClO4)2
  • b) Ca(ClO3)2
  • c) CaClO2
  • d) Ca(ClO2)2
Q.27
In the manufacture of bromine from sea water, the mother liquor containing bromine is treated with .. [ CBSE PMT 1992]
  • a) Carbon dioxide
  • b) Chlorine
  • c) Iodine
  • d) Sulphur dioxide
Q.28
The correct sequence of arrangement of the following compounds in order of decreasing oxidation number of iodine is .. [ IAS 1993]
  • a) HIO4, HI, I2, ICl5
  • b) HIO4, ICl5 , HI, I2
  • c) ICl5, HI4, I2, HI
  • d) HIO4, ICl5, I2, HI
Q.29
The solubility of iodine in water may be increased by adding [ DPMT 1994]
  • a) Potassium iodide
  • b) Chloroform
  • c) Carbon disulphide
  • d) Sodium thiosulphate
Q.30
In the reaction 2Br- + X2 → Br2 + 2X- ; X2 is ... [ EAMCET 1995]
  • a) Cl2
  • b) Br2
  • c) I2
  • d) N2
0 h : 0 m : 1 s