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Q.

Correct statements among the following
(A) On a weight-to-weight basis, the electrical conductivity of Aluminium is twice that of Copper
(B) ${Na}_{2} {CO}_{3}$ is used in water softening
(C) Copper - Beryllium alloys are used in preparation of high strength springs
(D) Metal borides are used in nuclear industry as protective shields and control rods

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a

A and C only

b

A, B, C only

c

B and C only

d

A, B, C and D

answer is D.

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Detailed Solution

(A)On a weight-to-weight basis, the electrical conductivity of Aluminium is twice that of Copper
(B) ${Na}_{2} {CO}_{3}$ is used in water softening
(C) Copper - Beryllium alloys are used in preparation of high strength springs
(D) Metal borides are used in nuclear industry as protective shields and control rods

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