Chemistry Questions & Answers - Free Online Practice

2.0 mole of Q3+ ions require the largest quantity of electricity for discharge at an electric. option B,C,D are all carrying a smaller quantity of electricity which not be proven for ant discharge

1,104.

A fixed mass of gas occupies 92cm3 at 3°C. What will be its volume at 18C if the pressure remains constant?

15.3cm³

87.3cm³

2.0cm³

97.0cm³

View answer & explanation

Correct answer is D

$\frac{V_{1}}{T_{1}}$ = $\frac{V_{2}}{T_{2}}$
$T_{1}$ = 3 + 273 = 276K
$T_{2}$ = 18 + 273 = 291K
$V_{1}$ = $92cm^{3}$
$V_{2}$ = ?
$V_{2}$ = $\frac{V_{1}T_{2}}{T_{1}}$

= $\frac{92 \times 291}{276}$
= $97.0cm^{3}$

1,105.

P1V1 = P2V2 supports ?

Charles’s law

Boyles’s law

Graham’s law

Avogadro’s law

View answer & explanation

Correct answer is B

V = 1/P

cross multiply

K = VP

V1P1 = V2V2

For a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. Or Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant.
The equations supports only Boyle’s law. Option A,C,D are not in support of the equation...