WorksheetsChem AS 2
Total questions: 16
Worksheet time: 4hrs 0mins
Which statement about this distribution curve is correct?
If the temperature of the gas is increased, the maximum of the curve becomes higher.
If the temperature of the gas is increased, the maximum of the curve moves to the left.
An atom of element X needs one extra electron for a full outer shell; an atom of element Y needs three extra electrons for a full outer shell.
An atom of element Y has five electrons in the 3p subshell.
Element X has an oxidation number of +7 in most of its compounds.
When element X combines with element Y, the bonding is ionic.
Which statement about the electrons in a ground state carbon atom is correct?
Electrons are present in four different energy levels.
There are more electrons in p orbitals than there are in s orbitals.
The occupied orbital of highest energy is spherical.
The occupied orbital of lowest energy is spherical.
In this question you should assume the vapour behaves as an ideal gas.
0.175 g of a volatile liquid produces a vapour of volume 4.50 × 10–5m3 at 100 °C and pressure of 1.013 × 105Pa.
What is the Mr of the liquid?
31.9
87.1
119
127
Which reaction is endothermic?
Ca(OH)2(aq) + 2HCl (aq) → CaCl2(aq) + 2H2O(l)
2Cl (g) → Cl2(g)
2Ca(s) + O2(g) → 2CaO(s)
CaCO3(s) → CaO(s) + CO2(g)
The rate of reaction will decrease and the position of the equilibrium will move to the left.
The rate of reaction will decrease and the position of the equilibrium will move to the right.
The rate of reaction will increase and the position of the equilibrium will move to the left.
The rate of reaction will increase and the position of the equilibrium will move to the right.
Which diagram correctly shows the electronegativity of the elements Na, Mg, Al and Si plotted against their first ionisation energies?
The properties of chlorine, bromine and their compounds are compared.
Which property is smaller for chlorine than for bromine?
bond strength of the hydrogen-halide bond
first ionisation energy
solubility of the silver halide in NH3(aq)
strength of the van der Waals’ forces between molecules of the element
Solid sodium iodide reacts with concentrated sulfuric acid to form more than one product that contains sulfur.
What is the lowest oxidation number of sulfur in these products?
-2
0
+4
+6
Which emission from an internal combustion engine contributes to the erosion of marble statues?
carbon monoxide
nitrogen
nitrogen dioxide
unburnt hydrocarbons
Ammonia, carbon dioxide and water react together to form ammonium carbonate.
Which statement about this reaction is correct?
It is a redox reaction.
It is an acid-base reaction.
The H–N–H bond angle decreases as a consequence of this reaction.
The three substances react in a 1 : 1 : 1 ratio in this reaction.
Structural isomerism and stereoisomerism should be considered when answering this question.
How many isomers with the formula C5H10 have structures that involve π bonding?
3
4
5
6
An organic compound X reacts with hot, concentrated acidified potassium manganate(VII)
solution to give a single carbon-containing product.
What could be X?
CH2C(CH3)2
CH3CHCHCH3
CH2CHCH2CH3
CH3CH2CH2CH3
Which gaseous molecules are polar?
ammonia
hydrogen sulfide
boron trifluoride
A carbon monoxide molecule, CO, has three bonds between the carbon atom and the oxygen atom.
Which features are present in one CO molecule?
two lone pairs of electrons
a co-ordinate (dative covalent) bond from oxygen to carbon
two π bonds
Carbon can exist as allotropes which include graphite, diamond and a fullerene.
Which statements are correct?
All three allotropes contain covalent bonds.
All three allotropes are giant molecular.
All three allotropes have delocalised electrons.
