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WorksheetsChemistry Quiz
Total questions: 25
Worksheet time: 13mins
Why should concentrated nitric acid be stored in a brown bottle?
Because it is volatile.
Because it is flammable.
Because it would decompose under sunlight.
Because it would react with oxygen in the air.
7.80 g of copper(II) sulphate crystals (CuSO4•5H2O) were dissolved to make 250.0 cm3 of solution. What is the molarity of the solution?
(Relative atomic masses: H = 1.0, O = 16.0, S = 32.1, Cu = 63.5)
0.125 mol dm-3
0.200 mol dm-3
1.250 mol dm-3
2.000 mol dm-3
A solution of sample X contains 4.81 × 10-4 mol dm-3 of hydrogen ions. What is the pH of the sample?
1.32
2.32
3.32
4.32
Which of the following liquids is miscible with water?
Bromine
Carbon disulphide
Cyclohexane
Ethanol
Which of the following hydroxides can dissolve in excess dilute sodium hydroxide solution?
Copper(II) hydroxide
Magnesium hydroxide
Iron(III) hydroxide
Zinc hydroxide
Which of the following pairs of solutions would NOT give a precipitate when mixed?
K2CO3(aq) and MgCl2(aq)
H2SO4(aq) and Ba(OH)2(aq)
NH3(aq) and Pb(NO3)2(aq)
Na2SO4(aq) and HCl(aq)
25.0 cm3 of water are mixed with 70.0 cm3 of 0.500 mol dm-3 nitric acid. What is the concentration of the diluted acid?
0.250 mol dm-3
0.368 mol dm-3
0.500 mol dm-3
0.679 mol dm-3
Consider the equation for the complete combustion of hexane
Which of the following combinations is correct?
w x y z
2 19 12 14
1 9 6 6
2 16 10 12
1 13 6 7
The structure of polystyrene is shown in the left:
What is the molecular mass of a polymer chain of polystyrene that made up of 7 000 repeating units?
520 000
455 000
546 000
728 000
Which of the following chemical species does NOT exist?
OF2
PCl3
NCl5
PCl5
Which of the following descriptions about the molecular shape of CH4 molecule is correct?
Linear
Trigonal planar
Trigonal pyramidal
Tetrahedral
Which of the following molecules is octahedral in shape?
SF6
PF5
CF4
BF3
Which of the following properties are affected by the strength of intermolecular forces? (1) Viscosity (2) Volatility (3) Density
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
When a positively charged rod is placed near a jet of liquid running out from a burette, the jet of liquid shows NO deflection. Which of the following may the liquid be?
Water (H2O)
Cyclohexane (C6H12)
Propanone (CH3COCH3)
Trichloromethane (CHCl3)
Which of the following properties are due to hydrogen bonding between water molecules? (1) Water has a higher boiling point than H2S. (2) Ice floats on water. (3) Water molecule is V-shaped.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
The structures of methane, ethane and propane are shown. The boiling point increases from methane to propane because
the number of atoms increases, so there are stronger electrostatic attractions between the atoms and the nuclei.
the covalent bonds are getting stronger, so more heat is required to break them.
there are more covalent bonds, so more heat is required to break them.
the number of electrons increases, so there are stronger van der Waals' forces.
Which of the following is correctly matched? Compound Homologous series
HCOOH carboxylic acid
C6H5CHO ketone
C2H5NH2 amide
CH3CH(OH)CH3 ester
Which of the following classes of compounds does NOT include C=O double bonds in their molecules?
Esters
Amides
Alcohols
Carboxylic acids
What is the molecular formula of the above compound?
C6H10O2
C6H12O2
C8H14O2
C8H16O2
What is the IUPAC name of the above compound?
2-ethylbutane
3-ethylbutane
3-methylpentane
2-ethyl-3-methylpropane
What is the IUPAC name of the above compound?
3-ethylhexene
3-ethylhex-1-ene
4-ethylhexene
4-ethylhex-5-ene
The above two molecules are
chain isomers.
enantiomers.
cis-trans isomers.
identical.
Which of the following can exhibit stereoisomerism?
2-methylbutanoic acid
2-chloropropane
2-methylbut-1-ene
3-methylbutan-1-ol
The above two molecules are
identical.
structural isomers.
cis-trans isomers
enantiomers.
Which of the following best represents the reaction of ammonia and boron trifluoride?
