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2881
Chlorine atom forms Cl- by
A.
donating lone pair of electrons
B.
gaining an electron
C.
losing an electron
D.
sharing an electron
E.
sharing a lone pair of electrons.
View Answer & Discuss (2)
NECO 2008
2882
The most efficient absorber of ultraviolet radiation in the atmosphere is
A.
CO
2
B.
H
2
C.
H
2
O
D.
0
2
E.
O
3
View Answer & Discuss (1)
NECO 2008
2883
When dust particles collide randomly in a beam of Sunlight, the phenomenon observed is known as
A.
Brownian movement.
B.
Dialysis
C.
Diffusion
D.
Osmosis
E.
Tyndall effect
View Answer & Discuss (12)
NECO 2008
2884
\( ^{234}_{90}Th → ^{234}_{91}Pa + X \)
In the nuclear reaction above, X is
A.
\( ^0_1e \)
B.
\( ^0_{-1}e \)
C.
\( ^4_2He \)
D.
\( ^1_0n \)
E.
\( ^1_1p\)
View Answer & Discuss (4)
NECO 2008
2885
What is the colour of phenolphthalein indicator in a basic medium?
A.
Blue
B.
Colourless
C.
Orange
D.
Pink
E.
Yellow
View Answer & Discuss (2)
NECO 2008
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