Q No.-1> atoms may be regarded as comprising of p's,n's and e's.if the mass attributed by electrons was doubled and that by neutrons was halved d at mass of C-12 'll b?

a)approx. the same

b)doubled

c)reduced aprrox. 25%

d)approx. halved

Q No 2> the wave no. fo 1st line of Balmer series of H z 15200cm^-1.the wave no of the first balmer line of Li2+ ion z?

a)15200

b)60800

c)76000

d)136800


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and in iitjee

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