1
IIT-JEE 1984
MCQ (More than One Correct Answer)
+1
-0.25
When alpha particles are sent through a thin metal foil, most of them go straight through the foil because
A
alpha particles are much heavier than electrons
B
alpha particles are positively charged
C
most part of the atom is empty space
D
alpha particle move with high velocity
2
IIT-JEE 1984
Numerical
+2
-0
2.68 $$\times$$ 10-3 moles of a solution containing an ion An+ require 1.61 $$\times$$ 10-3 moles of $$MnO_4^-$$ for the oxidation of An+ to $$AO_3^-$$ in acid medium. What is the value of n?
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3
IIT-JEE 1984
MCQ (Single Correct Answer)
+1
-0.25
The increasing order (lowest first) for the values of e/m (charges/mass) for electron (e), proton (p), neutron (n) and alpha particle ($$\alpha$$) is:
A
e, p, n, $$\alpha$$
B
n, p, e, $$\alpha$$
C
n, p, $$\alpha$$, e
D
n, $$\alpha$$, p, e
4
IIT-JEE 1984
MCQ (Single Correct Answer)
+1
-0.25
Correct set of four quantum numbers for the valence (outermost) electron of rubidium (Z = 37) is
A
5, 0, 0, $$ + {1 \over 2}$$
B
5, 1, 0, $$ + {1 \over 2}$$
C
5, 1, 1, $$ + {1 \over 2}$$
D
6, 0, 0, $$ + {1 \over 2}$$
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