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.
Which of the following will give a precipitate with an aqueous solution of copper (I) chloride?
But-2-ene
But-1-ene
But-2-yne
But-1-yne
Correct answer is D
No explanation has been provided for this answer.
A secondary alkanol can be oxidized to give an?
alkanone
alkyne
alkanoic acid
alkanal
Correct answer is A
Secondary alkanols (alcohols) can be oxidised to alkanones (ketones)
Petroleum is a non-renewable source of energy because it
is formed naturally
is cheap
can be recycled after use
cannot be regenerated once used up
Correct answer is D
No explanation has been provided for this answer.
A
B
C
D
Correct answer is B
Alkanols have the formula \(C_{n}H_{2n+1}OH\).
⇒ \( 12n + (1\times (2n+1)) + 16.0 + 1.0 = 60\)
= (14n +18 = 60\)
\(n = \frac{60-18}{14} = \frac{42}{14} = 3\)
Hence, the alkanol is gotten by putting n=3,
=\(C_{3}H_{7}OH\)
excessive ultraviolet light from the sun to reach the earth surface
excessive release of infrared light from the sun to the earth surface
corrosive effect of the chemicals on humans and animals
acidic effect of chemicals on humans
Correct answer is A
Chlorofluorocarbons are harmful to environment and living beings because it increases greenhouse gases in the environment which results in forming holes in the ozone layer.. And if this happens it will cause to an increase in the ultraviolet rays exposer, and which will make the earth's surface much hotter than usual.