The procedure of rare-earth (RE) element purification includes three steps. On each of these steps one forth of (RE) element mass is lost. What is % recovery of RE element. A) 8.0%
B)25%
C) 75%
D)42%

Fine out your self ponk

Electron equations of the given changes are as follow,a)                              cu      →      cu⁺²  + 2e⁻b)                              mg⁺²  +  2 e⁻      →      mgc)                              cl⁻    →      cl  +  1e⁻d)                              s  +  2 e⁻    →      s²⁻e)                                o²⁻      →      o  +  2 e⁻f)                              p  +  3 e⁻    →      p³⁻g)                              fe²⁺    →      fe³⁺  + 1 e⁻h)                              s²⁻    →      s⁴⁺  +  6 e⁻

No, because shearing causes strike-slip faults and normal faults are caused by tension.

The answer is d i think