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Sec 4 Express Science Chem TYS MCQ 2020 Set B
Quiz by HAO YI
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Which apparatus is used to collect a gas that is soluble in water and less dense than air?
Which apparatus is used to collect a gas that is soluble in water and less dense than air?
Which method is used to obtain potassium chloride crystals from an aqueous solution of potassium chloride?
A solution of compound W is tested with different reagents.
The results are shown.
What is W?
Which statement about isotopes of the same element is correct?
Element A is a metal and element B is a non-meal.
Which statement is correct?
Element X has the electronic configuration 2,4.
Element Y has the electronic configuration 2,6.
What is the formula of the compound formed between X and Y?
Calcium phosphate has the formula, Ca3(PO4)2.
What is the charge on the phosphate ion?
Glucose has a relative molecular mass, Mr, of 180.
How many grams of glucose are added to 50 cm3 of water to make a solution of concentration 0.4 mol/dm3?
Dissolving ammonium nitrate in water is an endothermic process.
Which row shows the direction of heat flow and the change in temperature when ammonium nitrate dissolves in water?
Aqueous iron(III) chloride reacts with aqueous potassium iodide to produce a brown solution.
Aqueous iron(II) chloride reacts with acidified potassium manganate(VII) to produce a yellow/pale orange solution.
What is the role of iron(III) chloride and iron(II) chloride in these reactions?
Which row about the reactions of an acid is correct?
An unknown metal oxide, XO, is an insoluble solid.
XO is an amphoteric oxide.
Which row is correct?
R and T are elements in Group 1 of the Periodic Table.
R has a melting point of 98 oC.
T has a melting point of 63 oC.
Which statement is correct?
Three metals X, Y and Z, were heated separately with the oxides of four metals P, Q, R and S, to find the order of reactivity.
The results are shown in the table.
What is the order of the reactivity of the metals from the least reactive to the most reactive?
Heated copper reacts with oxygen to produce copper(II) oxide.
The percentage of oxygen in air can be found by passing air over heated copper in the apparatus shown.
The plungers are alternately pushed so that air passes over the hot copper.
The original volume of air is 50 cm3.
Which graph shows how the volume of air changes during the experiment?
The diagram shows a fractionating tower in which petroleum is separated into fractions.
What are fractions P, Q and R?
Chlorine gas reacts with methane under certain conditions.
Which row describes the conditions required and the type of reaction?
The diagram shows part of the structure of an addition polymer.
What is the formula of the monomer used to make the polymer?
