1.

Arrange the following particles in the increasing order of their penetration capacity as the projectiles for artificial transmutation of elements: Proton `(._(1)H^(1))`, alpha particle `(._(2)He^(4))`, deuteron `(._(1)H^(2))`, neutron `(._(0)n^(1))`A. `._(2)He^(4) lt ._(1)H^(2) lt ._(1)H^(1) lt ._(0)n^(1)`B. `._(1)H^(1) lt ._(1)H^(2) gt ._(0)n^(1) lt ._(2)He^(4)`C. `._(1)H^(1) lt ._(1)H^(2) lt ._(2)He^(1) lt ._(0)n^(1)`D. `._(0)n^(1) lt ._(1)H^(2) lt ._(2)He^(4) lt ._(1)H^(2)`

Answer» Correct Answer - a
The penetrating power increases with increases in velocity of particles. Thus, the correct order of penetrating power of given particles is
`._(0)n^(1) gt ._(1)H^(1) gt ._(1)H^(2) gt ._(2)He^(4)`


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