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WorksheetsRevision - Inorganic Chemistry
Total questions: 10
Worksheet time: 5mins
X and Y are elements of the third period.
X and Y are individually heated in excess chlorine. Each product is purified and then separately added to water, producing two solutions. Both solutions have a pH of less than 5. What could be X and Y
Na and P
Mg and Al
Mg and Si
Si and P
An ore contains magnesium carbonate and barium carbonate. A sample of the ore is dissolved in nitric acid.
How could this solution be processed into a magnesium compound and a separate barium compound?
Add HCl (aq), filter off the solid barium chloride.
Add HCl (aq), filter off the solid magnesium chloride.
Add H2SO4 (aq), filter off the solid barium sulphate.
Add H2SO4 (aq), filter off the solid magnesium sulphate.
When calcium and calcium hydride, CaH2, react separately with water, they each produce a white solid and a colourless gas. The white solid is the same compound in each reaction.
Which statement is correct?
Both Ca and CaH2 produce H2.
Both Ca and CaH2 produce O2.
Ca produces H2 and CaH2 produce O2.
Ca produces O2 and CaH2 produce H2.
When concentrated sulfuric acid is added to solid sodium chloride, HCl is formed but not Cl2.
When concentrated sulfuric acid is added to solid sodium iodide, I2 is formed. Which statement explains these observations?
Sulfuric acid is an oxidising agent and chloride ions are more easily oxidized.
Sulfuric acid is an oxidising agent and iodide ions are more easily oxidized.
Sulfuric acid is a reducing agent and chloride ions are more easily reduced.
Sulfuric acid is a reducing agent and iodide ions are more easily reduced.
Elements and their compounds are important as catalyst.
In which process is a compound used, rather than an element?
catalytic converters
Contact process
Haber process
Hydrogenation of alkenes
The gaseous products of heating a mixture of Ca(OH)2 and NH4Cl are passed through solid CaO. This absorbs water vapour and a gas, W, is collected.
A sample of W is oxidized by Cl2(g) to produce two gases, X and Y. X is an element. Y is acidic. Y reacts with W to produce Z. What are X and Z?
X is N2 , Z is CaCl2
X is N2 , Z is NH4Cl
X is O2 , Z is CaCl2
X is O2 , Z is NH4Cl
Magnesium chloride, MgCl2, and silicon tetrachloride, SiCl4, are separately added to water. What are the approximate pH values of the solutions formed?
MgCl2 : 0-3 SiCl4 : 0-3
MgCl2 : 0-3 SiCl4 : 6-7
MgCl2 : 6-7 SiCl4 : 0-3
MgCl2 : 6-7 SiCl4 : 6-7
Cl2(g) is added to cold, aqueous NaOH. In a separate experiment, Cl2(g) is added to hot, aqueous NaOH. Which oxidation states of Cl are found in the reactants and products of the two reactions that take place?
0, -1, +1 and +5
0, -1 and +1 only
0, -1 and +5 only
0, +1 and +5 only
Ammonia exists as simple covalent molecules, NH3. Ammonia can react with suitable reagents to form products containing ammonium ions NH4+. Ammonia can also react with suitable reagents to form products containing amide ions, NH2-. Which of these nitrogen-containing species are present in an aqueous solution of ammonia?
ammonia molecules and amides ions only
ammonia molecules and ammonium ions only
ammonia molecules only
ammonium ions only
What would be produced when 60g of NO react with an excess of CO in a catalytic converter?
12 g of C and 92 g of NO2
24 g of C and 92 g of NO2
88 g of CO2 and 28 g of N2
88 g of CO2 and 56 g of N2
