The number of peroxide linkages in CrO5 is /are

(1) one

(2) two

(3) three

(4) none

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Conversion of PbSO4 to Pbs is:

(a) reduction of S

(b) oxidation of S

(c) dissociation

(d) none of these

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In which reaction the underlined substance has been reduced?

(a) Carbon Monoxide + Copper Oxide  Carbon Dioxide + Copper

(b) Copper Oxide + Hydrochlorid Acid  Water + Copper Chloride

(c) Steam + Iron Hydrogen + Iron oxide

(d) Hydrogen+ Iron Oxide  Water + Iron

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Oxidation number of Fe in K3[Fe(CN)6] is:

(a) +2

(b) +3

(c) +4

(d) +1

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It is found that v forms a double salt isomorphous with Mohr's salt. The oxidation number of V in this compound is:

(a) +3

(b) +2

(c) +4

(d) -4

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The correct order of reducing power of halide ions is:

(a) Cl- > Br- > I- > F-

(b) Cl- >  I- > Br- > F-

(c)  Br> Cl- > I- > F-

(d)  I- > Br> Cl- > F-

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When H2SO3 is converted into H2SO4 the change in the oxidation state of sulphur is from:

(a) 0 to +2

(b) +2 to +4

(c) +4 to +2

(d) +4 t0 +6

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In which of the following processes nitrogen is oxidised?

(a) NH4+ N2

(b) NO3- NO

(c) NO2 NO2-

(d) NO3 NH4+ 

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In which reaction is hydrogen acting as an oxidising agent?

(a) With ioding to give hydrogen iodide

(b) With lithium to give lithium hydride

(c) With nitrogen to give ammonia

(d) With sulphur to give hydrogen sulphide

 

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Fluorine is a strong oxidising agent because:

(a) it has several isotopes

(b) it is very small and has 7 electrons in valency shell

(c) its valency is one

(d) it is the first member of the halogen series

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