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.
75cm3
125cm3
100cm3
50cm3
Correct answer is B
No explanation has been provided for this answer.
150°C
177°C
75°C
120°C
Correct answer is A
Parameters given:
V1 = 200 cm3; T1 = 27 + 273 = 300K.
V2 = 150 cm3; T2 = ?
P2 = 2P1.
Using the Ideal Gas Equation:
P1V1T1=P2V2T2
P1×200300=2P1×150T2
23=300T2
T2 = 450K.
= 450K - 273K
= 177°C
177 - 27 = 150
That is the amount by which T1 must be increased.
XY
X2Y
Y2X3
X2Y3
Correct answer is C
No explanation has been provided for this answer.
which contains protons and neutrons
which is positively charged
which is massive and can cause deflection of a few projectiles
which is very large and in which close to 98% of projectiles pass undeflected
Correct answer is C
Rutherford's account of Nuclear theory does not include the fact that atoms contain a massive region and cause deflection of from projectiles.
SO3 is an acidic gas
Acid is usually added to water and not water to acid
The reaction between SO3 and water is violently exothermic
SO3 does not dissolve readily in water
Correct answer is C
No explanation has been provided for this answer.