WorksheetsPBD CHM F5 2021
Total questions: 21
Worksheet time: 28mins
Which of the following is not a redox reaction?
2Mg + O₂ --> 2MgO
Cl₂ + 2KI --> 2KCl + I₂
KOH + HCl --> KCl + H₂O
2FeCl₃ + Mg --> 2FeCl₂ + MgCl₂
The diagram below shows an experiment conducted in the lab. Which of the following statements are correct regarding the experiment?
Solution X is an oxidising agent
The ions in solutions Y give up electrons
Oxidation occurs at the carbon U
Electrons flow from R to U through the external circuit.
The diagram below shows the apparatus set-up of an experiment to electroplate an iron spoon with copper. Which of the following is the observation of the experiment?
The iron spoon becomes thinner
Part of the iron spoon dissolves in the solution
No visible change is observed on the iron spoon
The iron spoon is coated with a layer of reddish-brown deposits
"An electric current is passed through a concentrated aqueous copper(II) chloride solution, using carbon as electrodes.” Which of the following is the correct half equations for the discharge of ions at the anode and the cathode?
A
B
C
D
The table above shows an information about compound J. What is the molecular formula of compound J?
HCOOH
CH₃CH₂COOH
CH₃COOH
HCOOCH₃
Which of the following statements about the compound with the molecular formula C₁₇H₃₄ is true?
It is soluble in water.
It has the same chemical properties as decane.
It burns in excess oxygen to produce carbon monoxide and water.
It undergoes addition reaction with acidified potassium manganate(VII) solution.
Hex-1-ene and hexane are colourless liquids. Q can be used to distinguish hex-1-ene from hexane. Q is ...
lime water
liquid bromine
dilute sulphuric acid
potassium bromide solution
Pentyl ethanoate has a banana smell. Which of the following statements represents the property of pentyl ethanoate?
Soluble in water
Can conducts electricity
Has a low boiling point
Has a higher density than water
The equation shown represents the complete combustion of ethane in air. At room temperature and pressure, y mol of ethane requires 84 cm³ of oxygen for complete combustion. Find the value of y. [1 mol of gas occupies 24 dm³ at room temperature and pressure]
0.002
0.50
1.00
0.001
Ethanol is produced when a mixture of ethene and steam at 300 ℃ and 60 atm pressure is passed over catalyst P. What is catalyst P?
aluminium oxide
finely divided platinum
concentrated sulphuric acid.
phosphoric acid
In one experiment, 50 cm³ of 2.0 mol dm‾³ sodium hydroxide solution is poured into 50 cm³ of 1.0 mol dm‾³ copper(II) sulphate solution. Given that the heat of precipitation of copper(II) hydroxide in the reaction between copper(II) sulphate solution is -59 kJ mo‾¹. [specific heat capacity of water = 4.2 J g‾¹ ℃‾¹]. Among the following, which is the correct rise in temperature?
7 ℃
10 ℃
12 ℃
14 ℃
Which of the following reactions represent that hydrogen peroxide acts as a reducing agent?
H₂O₂ + 2KI + H₂SO₄ →I₂+ K₂SO₄ +2H₂O
3H₂O₂ +2AuCl₃ → 2Au + 6HCl +3O₂
4H₂O₂ + PbS →PbSO₄ + 4H₂O
H₂O₂ +Ag₂O →2Ag + H₂O + O₂
What will occur when a mixture of propan-1-ol and acidified potassium dichromate(VI) solution is heated under reflux?
An ester is produced
Propan-1-ol is oxidised
Propanoic acid is produced
A colourless solution which decolourise brown bromine water is produces
Which of the following pairs of hydrocarbon, R and S, are isomers?
I
II
III
IV
Which of the following reactions releases heat to the surroundings?
Adding concentrated acid to the water.
Adding sodium hydrogen carbonate to acid.
Dissolving solid aluminium sulphate in water.
Adding anhydrous copper(II) sulphate to water
The oxidation number of vanadium in NH₄VO₃ is ... [Oxidation number of N = -3]
(a)
Name compound X
(a)
Name the process III..
(a)
The process of preparing compound A in laboratory is ...
(a)
The function of KMnO₄ in process is ...
(a)
When 0.75 g of fuel X was burnt, it raised the temperature of 100 cm³ of water by 30.0 ℃. Determine the fuel value of fuel X (WITH CORRECT UNIT). [molar mass of X = 60 g mol‾¹ ,specific heat capacity of water = 4.2 J g‾¹ ℃‾¹] [Your answer should have space between number and unit]
(a)
