Past JEE Questions Ch.12 NUCLEAR CHEMISTRY

1996
(27,13) Al is a stable isotope. (29,13) Al is expected to disintegrate by
a) α emission
b) β emission
c) positron emission
d) proton emission

1998

Loss of β particle is equivalent to
a) increase of one proton only
b) decrease of one neutron only
c) both of (a) and (b)
d) none of these

1998

Decrease in atomic number is observed during

a) α emission
b) β emission
c) positron emission
d) electron emission

1991
The nucleus resulting from (238, 92) U after successive emission of two α particles and four β particles is

a) (230,90) Th
b) 230,94 Pu
c) 230,88 Ra
d) 230,92 U

1991

The number of neutrons accompanying the formation of 139,54 Xe and 94,38 Sr from the absorption of slow neutron by 235,92 U followed by nuclear fission is

a) 0
b) 2
c) 1
d) 3