WorksheetsPhysical and Inorganic 1
Total questions: 28
Worksheet time: 56mins
Which of the following contains the most chloride ions?
15 cm3 of 3.40 × 10−2 mol dm−3 aluminium chloride solution
30 cm3 of 5.50 × 10−2 mol dm−3 calcium chloride solution
40 cm3 of 2.30 × 10−2 mol dm−3 hydrochloric acid
45 cm3 of 2.20 × 10−2 mol dm−3 sodium chloride solution
The maximum uncertainty when weighing 0.250 g on a balance was 0.001 g.
What is the percentage uncertainty?
4.0%
0.4%
0.8%
250%
Which species has the same number of electrons as the radical •CH3?
CH2
CH3+
CH3−
CH4+
Line X in the diagram represents the volume (V) of gas formed with time (t) in a reaction between an excess of magnesium and aqueous sulfuric acid.
Which line represents the volume of hydrogen formed, at the same temperature and pressure, when the concentration of sulfuric acid has been halved?
Which of these species is not planar?
HCHO
CH3+
CH3OH
C2H4
Bromine exists as two isotopes 79Br and 81Br, which are found in almost equal abundance.
Which of the statements is correct?
The first ionisation energy of 79Br is less than the first ionisation energy of 81Br
The atomic radius of 79Br is less than the atomic radius of 81Br
The mass spectrum of C3H7Br has two molecular ion peaks at 122 and 124
79Br is more reactive than 81Br
Which molecule does not have a permanent dipole?
CH3Cl
CHCl3
CF4
CHCl2F
The equation for the hydrogenation of ethyne is
C2H2 + 2H2 ⟶ C2H6
The experimental yield is 65.0%.
What is the mass in grams of ethane that can be produced from 16.20 g of hydrogen?
42.53 g
78.98 g
121.5 g
527.7 g
What is the number of atoms in 0.0100 mol of NH3?
(The Avogadro constant L = 6.022 × 1023mol-1)
6.02 × 1025
1.20 × 1023
1.81 × 1022
2.41 × 1022
What is the empirical formula of 4-hydroxypent-2-ene?
C5H12O
C5H10O
CH2O
C5H9OH
Which is the correct classification for the element yttrium (Y)?
s block
p block
d block
f block
2.40 g of an explosive, J, contains 0.473 g of nitrogen. J also contains 33.8% carbon and 1.41% hydrogen by mass. The remainder of J is oxygen.
What is the empirical formula of J?
C4HNO2
CH2N2O
C2HNO2
CHNO
After reaction of some zinc metal with excess sulfuric acid, a student collected 40.8 g of ZnSO4.7H2O crystals. The yield of crystals was 70.0%.
What was the original mass of zinc used?
9.28 g
13.3 g
23.6 g
58.3 g
Which of these is a redox reaction?
CaO + SiO2 ⟶ CaSiO3
H2SO4 + Na2O ⟶ Na2SO4 + H2O
NaBr + H2SO4 ⟶ NaHSO4 + HBr
Mg + S ⟶ MgS
Which of the following is a correct statement about the trend in atomic radius across Period 3 of the Periodic Table?
radius increases because the atoms have more electrons
radius decreases because nuclear charge increases
radius increases because shielding (screening) increases
radius decreases because shielding (screening) decreases
Element Q forms a sulfate with formula QSO4
Which of these could represent the electronic configuration of an atom of Q?
[Ne]3s1
[Ne]3s2
[Ne]3s23p1
[Ne]3s13p2
Which of these correctly shows the numbers of sub-atomic particles in a 41K+ ion?
A
B
C
D
Which equation represents a reaction that does take place?
Cl2 + 2NaI ⟶ 2NaCl + I2
Br2 + 2NaCl ⟶ 2NaBr + Cl2
NaCl + H2O ⟶ HCl + NaOH
2HCl + H2SO4 ⟶ Cl2 + SO2 + 2H2O
Which species is the best oxidising agent?
Cl2
Cl−
Br2
Br−
The following equilibrium was established in a container with volume V cm3 at 393 K and 200 kPa.
M2(g) + R(g) ⇌ RM2(g) ΔH = +150 kJ mol−1
Which change would increase the yield of RM2?
change the pressure to 150 kPa
change the temperature to 293 K
remove RM2 as it is formed
change the volume of the vessel to 2V cm3
Which of these shows nitrogen in its correct oxidation states in the compounds given?
A
B
C
D
What is the volume of 0.200 mol dm-3 Ba(OH)2 (aq) required to neutralise exactly 30.0 cm3 of 0.100 mol dm-3 HCl(aq)?
150.0 cm3
75.0 cm3
15.0 cm3
7.50 cm3
Which reaction has the largest atom economy for the production of hydrogen?
C + H2O ⟶ CO + H2
Zn + 2HCl ⟶ ZnCl2 + H2
CH4 + H2O ⟶ CO + 3H2
CO + H2O ⟶ CO2 + H2
What is the pH of a 0.020 mol dm–3 solution of a diprotic acid which is completely dissociated?
1.00
1.40
1.70
4.00
The acid dissociation constant, Ka, of a weak acid HA has the value 2.56 × 10–4 mol dm–3.
What is the pH of a 4.25 × 10–3mol dm-3 solution of HA?
5.96
3.59
2.98
2.37
Magnesium reacts with hydrochloric acid according to the following equation.
Mg + 2HCl --> MgCl2 + H2
A student calculated the minimum volume of 2.56 mol dm–3 hydrochloric acid required to react with an excess of magnesium to form 5.46 g of magnesium chloride (Mr = 95.3)
Which of the following uses the correct standard form and the appropriate number of significant figures to give the correct result of the calculation?
4.476 × 10–2 dm3
4.48 × 10–2 dm3
4.50 × 10–2 dm3
44.8 × 10–3 dm3
In which reaction is hydrogen acting as an oxidising agent?
Cl2 + H2 --> 2HCl
(CH3)2CO + H2 --> (CH3)2CHOH
N2 + 3H2 --> 2NH3
2Na + H2 --> 2NaH
The following equation represents the oxidation of vanadium(IV) ions by manganate(VII) ions in acid solution.
5V4+ + MnO4– + 8H+ --> 5V5+ + Mn2+ + 4H2O
What volume of 0.020 mol dm–3 KMnO4 solution is required to oxidise completely a solution containing 0.010 mol of vanadium(IV) ions?
10 cm3
25 cm3
50 cm3
100 cm3
