Loading...
Sec 4 Express Science Chem TYS MCQ 2021 Set B
Quiz by HAO YI
Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.
A colourless solution of P is tested separately with aqueous sodium hydroxide and with aqueous silver nitrate acidified with dilute nitric acid.
The results are shown.
What is P?
calcium chloride
zinc sulfate
zinc chloride
calcium sulfate
Which pieces of apparatus must be used to carry out an experiment to measure the change in temperature when 1 g of magnesium powder is added to excess dilute hydrochloric acid?
1 a balance
2 a gas syringe
3 a stopwatch
4 a thermometer
A colourless solution of P is tested separately with aqueous sodium hydroxide and with aqueous silver nitrate acidified with dilute nitric acid.
The results are shown.
What is P?
Which diagram represents a change of state in which the energy of the particles is lost?
The diagram shows the structure of an atom.
Which atom is represented by the diagram?
X is a covalently bonded compound made from the elements chlorine and oxygen.
Which 'dot and cross' diagram shows the arrangement of outer shell electrons in a molecule of X?
The temperature of dilute hydrochloric acid and aqueous sodium hydroxide are measured separately.
The two solutions are mixed and the temperature of the mixture increases.
Which row describes the type and the energy transfer of the reaction?
Chemical Z is a powerful reducing agent.
Which statement about Z is correct?
Turmeric is an example of a natural indicator.
This solution turns red when an alkali or base is added but remains yellow if an acid is added.
Turmeric solution is added to a sample of liquid soap, pH 8, and to vinegar, pH 3.
Which colours are observed?
The solubility of some salts in water is shown.
Which aqueous solutions are mixed to prepare an insoluble salt?
Elements X and Y are in the same period of the Periodic Table.
X is a metal and Y is a non-metal.
Which statement is correct?
P, Q, R and S are elements.
Some properties of these elements are shown.
Which statement is correct?
Some properties are listed.
- low melting point
- solid at room temperature
- good conductor of electricity
- good conductor of heat
- forms an acidic oxide
Which of these properties are typical of a non-metallic element?
W, X, Y and Z are four metals.
W reacts violently with cold water.
X does not react with cold water but reacts with steam.
Y reacts slowly with cold water.
Z does not react with hydrochloric acid.
Which row shows the order of reactivity of W, X, Y and Z?
80 cm3 of dry air measured at room temperature is passed generally over heated copper using the apparatus shown.
The heated copper reacts with oxygen to form copper(II) oxide.
After the reaction is complete, the air remaining is allowed to cool to room temperature.
What is the volume of air remaining?
Petroleum is separated into a number of useful fractions by fractional distillation.
One of the fractions is naphtha.
What is a use of naphtha?
Which statement about alkenes are correct?
1 They are saturated hydrocarbons.
2 They burn in excess air to produce carbon dioxide and water.
3 Their general formula is CnH2n+2.
4 They react with hydrogen in the presence of a catalyst.
The formula of potassium manganate(VII) is KMnO4.
Which statement about potassium manganate(VII) is correct?
