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20. Match the reactions in Column I with nature of the reactions/type of the products in Column II.
Column I |
Column II |
||
(A) |
O2- → O2 + O22- |
(p) |
redox reaction. |
(B) |
CrO42- + H+ → |
(q) |
one of the products has trigonal planar structure |
(C) |
MnO4- + NO2- + H+ → |
(r) |
dimeric bridged tetrahedral metal ion |
(D) |
NO3- + H2SO4 + Fe2+ → |
(s) |
disproportionation |
21. Match the compounds/ions in Column I with their properties/reactions in Column II.
Column I |
Column II |
||
(A) |
C6H6CHO |
(p) |
Gives precipitate with 2, 4-dinitrophenylhydrazine |
(B) |
CH3C≡CH |
(q) |
Gives precipitate with AgNO3 |
(C) |
CN- |
(r) |
Is a nucleophile |
(D) |
I- |
(s) |
Is involved in cyanohydrins formation |
22. Match the crystal system/unit cells mentioned in Column I with their characteristic features mentioned in Column II.
Column I |
Column II |
||
(A) |
Simple cubic and face-centred cubic |
(p) |
Have these cell parameters |
(B) |
Cubic and rhombohedral |
(q) |
Are two crystal systems |
(C) |
Cubic and tetragonal |
(r) |
Have only two crystallographic angles of 90o |
(D) |
Hexagonal and monoclinic |
(s) |
Belong to same crystal system |
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