Related Practice Questions :

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

(a) A2(BC3)2

(b) A3(BC4)2

(c) A3(B4C)2

(d) ABC2 

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Which of the following is a redox reaction?

(a) NaCl + KNO3 NaNO3 + KCl

(b) CaC2O4 + 2HCl CaCl2 + H2C2O4

(c) Mg(OH)2 + 2NH4Cl MgCl2 + 2NH4OH

(d) Zn + 2AgCN 2Ag + Zn(CN)2

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Which metal exhibits more than one oxidation states?

(a) Na

(b) Mg

(c) Al

(d) Fe

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In the aluminothermic process, aluminium acts as:

(a) an oxidising agent

(b) a flux

(c) a reducing agent

(d) a solder

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Which of the following change represents a disproportionation reaction(s)?

(a) Cl2 + 2OH- ClO- + Cl- + H2O

(b) Cu2O(s) + 2H+ Cu2+ + Cu(s) + H2O

(c) 2HCuCl2 waterDilution with Cu + Cu2+ + 4 Cl- +  2H+

(d) All of the above

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