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WorksheetsGrade 14 Chemistry Quiz
Total questions: 10
Worksheet time: 17mins
Which is the correct equation for the first ionisation energy of tin, Sn?
Sn+(g) → Sn2+(g) + e−
Sn(g) → Sn4+(aq) + e−
Sn(g) → Sn+(g) + e−
Sn(s) → Sn2+(aq) + e−
Which of the following statements about isotopes is not correct?
The carbon-14 isotope contains 2 more neutrons.
In a magnesium-26 isotope, there are 14 neutrons.
In silicon-30 isotope, there are 14 protons.
Isotopes contain different number of protons.
Which of these correctly shows the identity of an ion with 18 electrons and 16 neutrons?
35Cl−
31P3−
18O2−
14N3−
Which of the following has an incomplete sub-shell?
F
Ne
Ca
Zn
Element E is located in Period 3. Using the successive ionisation data given, what is the electron configuration of element E?
1s2 2s2 2p6 3s2 3p3
1s2 2s2 2p6 3s2 3p2
1s2 2s2 2p6 3s2 3p4
1s2 2s2 2p6 3s2 3p5
Which formula represents the empirical formula of a compound?
C3H6
C6H12O6
CH3CH2CHO
CH2OHCH2COOH
What is the number of molecules in 300 cm3 of nitrogen gas at room temperature and pressure?
1.51 x 1022
7.53 x 1024
1.52 x 1025
7.53 x 1021
5.5 g of potassium hydroxide, KOH, is dissolved in 150 cm3 of solvent to produce solution with Y mol dm−3. What is Y?
0.00157
0.0157
0.000653
0.653
Iron reacts with sulfur as shown in the following equation. 170.0 g of iron is reacted with 68 g of sulfur. What is the mass of the iron sulfide formed when this reaction is complete?
267.80 g
81.75 g
186.21 g
454.01 g
When a hydrocarbon is burnt in excess oxygen, 9.70 g of carbon dioxide and 7.92 g of water are made. What is the empirical formula of the hydrocarbon?
CH
CH2
C2H4
CH4
