Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
What is the colour of phenolphthalein indicator in a basic medium?
Blue
Colourless
Orange
Pink
Yellow
Correct answer is D
No explanation has been provided for this answer.
\( ^{234}_{90}Th → ^{234}_{91}Pa + X \)
In the nuclear reaction above, X is
\( ^0_1e \)
\( ^0_{-1}e \)
\( ^4_2He \)
\( ^1_0n \)
\( ^1_1p\)
Correct answer is B
No explanation has been provided for this answer.
When dust particles collide randomly in a beam of Sunlight, the phenomenon observed is known as
Brownian movement.
Dialysis
Diffusion
Osmosis
Tyndall effect
Correct answer is E
No explanation has been provided for this answer.
The most efficient absorber of ultraviolet radiation in the atmosphere is
CO2
H2
H2O
02
O3
Correct answer is E
No explanation has been provided for this answer.
donating lone pair of electrons
gaining an electron
losing an electron
sharing an electron
sharing a lone pair of electrons.
Correct answer is B
Chlorine is a non-metal and non-metals ionize by gaining electron(s)