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.
purer than sample 2
slightly denser than sample 2
in all respects the same as sample 2
colourless but sample 2 has a light brown colour
slightly less reactive than sample 2
Correct answer is B
No explanation has been provided for this answer.
water
toluene
ethanol
butan-2-ol
none
Correct answer is C
No explanation has been provided for this answer.
Hydrogen is not liberated when trioxonitrate(v)acid reacts with zinc because
zinx is not rendered passive by acid
hydrogen produced is oxidized to water
oxides of nitrogen are produced
all nitrates are soluble in water
trioxonitrate(v)acid is a strong acid
Correct answer is B
When metals react with nitric acid, hydrogen gas is liberated. Nitric acid is a very strong oxidizing agent. So , it oxidizes the hydrogen gas formed during the reaction to form water and an oxide of nitrogen.
\(Zn+4HNO_{3} \to Zn(NO_{3})_{2} + 2NO_{2} + 2H_{2}O\)
18.6k
100.0k
298.0k
1192.0k
4768.0k
Correct answer is E
\(\frac{P_1V_1}{T_1} = \frac{4P_1 \times 4V_1}{T_2}\)
i.e \(\frac{P_1V_1}{298} = \frac{4P_1 \times 4V_1}{T_2}\)
T2 = \(\frac{298 \times 4P_1 \times 4V_1}{P_1V_1}\)
= 298 + 16 = 4768.0k
i, iv and v
iv and v
i and iv
ii and v
ii, iii and iv
Correct answer is C
No explanation has been provided for this answer.