25 Questions
What is a product formed when chlorine is passed through cold, dilute aqueous sodium hydroxide?
NaCl and NaClO
Which of the following is NOT a product when potassium iodide reacts with concentrated sulfuric acid?
NaCl
What change would be expected to increase the time taken for solid sulfur to appear when sodium thiosulfate reacts with hydrochloric acid?
Increasing the temperature
What happens when the temperature is increased at constant pressure in a reversible reaction involving PCl3 and Cl2 to form PCl5?
The rate of reaction increases; equilibrium yield increases
What is the maximum volume, in dm3, measured at room temperature and pressure (r.t.p.), of gas produced from 3.69 g of lithium carbonate?
1.20
How many molecular ion peaks are there in the mass spectrum of 1,2-dichloroethane containing isotopes 1H, 12C, 35Cl, and 37Cl?
2
In the reaction where graphite burns to form carbon monoxide, which of the following is correct?
Heat is released
What is the effect of increasing pressure at constant temperature on the rate of reaction and yield of PCl5(g)?
Decrease, decrease
When a chloroalkane is heated with dilute aqueous sodium hydroxide and the pure organic product shows no change in color when warmed with acidified potassium dichromate(VI) solution, which chloroalkane could it be?
1-chloro-2-methylpropane
In the context of two isomeric alcohols and two isomeric carbonyl compounds, which reaction is possible?
Reducing propan-1-ol to propanal
Which compound would be expected to give a significant peak at m/z = 31 in its mass spectrum among the given options?
Propanal, CH3CH2CHO
If propanal is reduced instead of oxidized in a chemical reaction involving two isomeric alcohols and carbonyl compounds, what would be the expected outcome?
Formation of propanone
What would be the effect on the yield of PCl5(g) if the pressure is decreased at constant temperature?
Decrease
Which statement about the reactivity of halogens is correct?
Chlorine is more reactive than bromine.
A white solid X produces a red color in a flame test and forms a cream precipitate with silver nitrate that dissolves in ammonia. What is the formula of X?
SrBr2
If 50.0 cm³ of 2.00 mol dm⁻³ nitric acid reacts with 50.0 cm³ of 1.00 mol dm⁻³ barium hydroxide, what is the concentration of the resulting barium nitrate solution?
1.00 mol dm⁻³
If a burette has an uncertainty of ± 0.05 cm³, what is the percentage uncertainty in measuring 50.00 cm³ of a solution?
0.1%
Which halogen is least reactive?
Iodine
Which ion is the strongest reducing agent?
Fluoride ion
What is the standard enthalpy of formation, $\Delta_f H$, of carbon monoxide?
$-221$ kJ/mol
What is the standard enthalpy of combustion, $\Delta_c H$, of carbon?
$-110.5$ kJ/mol
Which type of intermolecular force is the strongest in solid hydrogen iodide, HI?
Hydrogen bonds
Which of the given reactions is a disproportionation reaction?
Reaction 3
Which of the given reactions is an acid-base reaction?
Reaction 4
Which statement about the stability and solubility of barium and magnesium compounds is correct?
Barium sulfate is less soluble in water than magnesium sulfate.
This quiz section focuses on the decomposition of lithium carbonate and determining the maximum volume of gas produced at room temperature and pressure. Answer all the questions by selecting one option from A to D. Remember to mark your answers clearly to avoid confusion.
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