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.
75cm\(^3\)
125cm\(^3\)
100cm\(^3\)
50cm\(^3\)
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:
V\(_1\) = 200 cm\(^3\); T\(_1\) = 27 + 273 = 300K.
V\(_2\) = 150 cm\(^3\); T\(_2\) = ?
P\(_2\) = 2P\(_1\).
Using the Ideal Gas Equation:
\(\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}\)
\(\frac{P_1 \times 200}{300} = \frac{2P_1 \times 150}{T_2}\)
\(\frac{2}{3} = \frac{300}{T_2}\)
T\(_2\) = 450K.
= 450K - 273K
= 177°C
177 - 27 = 150
That is the amount by which T1 must be increased.
XY
X\(_2\)Y
Y\(_2\)X\(_3\)
X\(_2\)Y\(_3\)
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.
SO\(_3\) is an acidic gas
Acid is usually added to water and not water to acid
The reaction between SO\(_3\) and water is violently exothermic
SO\(_3\) does not dissolve readily in water
Correct answer is C
No explanation has been provided for this answer.