1.

Who discovered neutron [IIT 1982; BITS 1988;CPMT 1977; NCERT 1974; MP PMT 1992; MP PET 2002]

A.                 James Chadwick    
B.                 William Crooks
C.                 J.J. Thomson          
D.                 Rutherford
Answer» B.                 William Crooks


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