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Match the items of column I with items o...

Match the items of column I with items of column II and assign the correct code.
`{:(ColumnI,ColumnII),((A)"Pendulum",(1)"Chrome steel"),((B)"Malachite",(2)"Nickel steel"),((C)"Calamine",(3)Na_(3)AlF_(6)),((D)"Cryolite,(4)CuCO_(3).Cu(OH)_(2)),(,(5)ZnCO_(3)):}`

A

A(1) `" " `B(2) `" "`C(3)`" "`D(4)

B

A(2) `" " `B(4) `" "`C(5)`" "`D(3)

C

A(2) `" " `B(3) `" "`C(4)`" "`D(5)

D

A(4) `" " `B(5) `" "`C(3)`" "`D(2)

Text Solution

Verified by Experts

The correct Answer is:
B
Explanation. Nickel steel has negligible coefficient of expanstion and hence it is used for making pendulum. Malchite, ` CuCO _ 3 . Cu(OH)_ 2 ` is an ore of copper. Calamine is actually ` ZnCO _ 3 ` and cryolite is ` N a _ 3AlF_6`.
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