Solutions - CBSE Class 10 Sample Paper for 2022 Boards - Science [MCQ]

Class 10
Solutions to CBSE Sample Paper - Science Class 10

A cable manufacturing unit tested few elements on the basisof their physical properties.

Q 48 - few elements on the basisof their physical properties - Teachoo.jpg

Which of the above elements were dicarded for usage by the company?

(A) W, X, Y

(B) X, Y, Z

(C) W, X, Z

(D) W, X, Z


Answer - 

Cable Manufacturing company-01.jpg


  • Metals can be beaten into thin sheets , this property of metals is called malleability .
  • The ability of metals to be drawn into thin wires is called ductility .

A Cable Manufacturing company makes cables (thin wire). Thus, it needs

  • Elements which are malleable
  • Elements which are ductile
  • Elements which conduct electricity
  • And, elements which have high melting point


A cable manufacturing unit will discard elements with  

  • low malleability, 
  • low ductility 
  • low melting point. 
  • And it will also discard elements which don’t conduct electricity


From our options

  • W cannot be discarded as it has all desired characteristics
  • X is discarded because it is not malleable
  • Y is discarded because it is not malleable
  • Z is discarded because it does not conduct electricity


Hence, from this view elements X, Y, and Z should be discarded.


So, the correct answer is (b)  



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CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo