A compound contains atoms of three elements A,B and C. If the oxidation number of A is +2, Bis +5 and that of C is -2, the possible formula of the compound is :
1. A2(BC3)2
2. A3(B4C)2
3. A3(BC4)2
4. ABC2
The number of peroxide linkages in CrO5 is /are
1. One
2. Two
3. Three
4. None of the above
Conversion of PbSO4 to PbS is:
1. Reduction of S
2. Oxidation of S
3. Dissociation
4. None of the above
Redox reaction among the following is -
1. NaCl + KNO3 NaNO3 + KCl
2. CaC2O4 + 2HCl CaCl2 + H2C2O4
3. Mg(OH)2 + 2NH4Cl MgCl2 + 2NH4OH
4. Zn + 2AgCN 2Ag + Zn(CN)2
The oxidation number of Fe in K3[Fe(CN)6] is-
1. +2
2. +3
3. +4
4. +1
It is found that v forms a double salt isomorphous with Mohr's salt. The oxidation number of V in this compound is:
1. +3
2. +2
3. +4
4. -4
The correct order of reducing power of halide ions is:
1. Cl- > Br- > I- > F-
2. Cl- > I- > Br- > F-
3. Br- > Cl- > I- > F-
4. I- > Br- > Cl- > F-
The reaction during which nitrogen gets oxidised is-
1. N2
2. NO
3. NO2
4. N
Reaction that shows hydrogen as an oxidising agent is:
1. With iodine to give hydrogen iodide
2. With lithium to give lithium hydride
3. With nitrogen to give ammonia
4. With sulphur to give hydrogen sulphide
Fluorine is a strong oxidising agent because:
1. it has several isotopes
2. it is very small and has 7 electrons in valency shell
3. its valency is one
4. it is the first member of the halogen series