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Sec 4 Express Science Chem TYS MCQ 2015 Set B
Quiz by HAO YI
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Four bottles containing colourless solutions have no labels.
A series of individual test are carried out on each of the solutions.
Which bottle contains ammonium chloride solution?
A
B
C
D
Methanol boils at 65 oC and water boils at 100 oC.
Methanol and water are completely miscible with each other.
Which method is used to separated a mixture of these two liquids?
Four bottles containing colourless solutions have no labels.
A series of individual test are carried out on each of the solutions.
Which bottle contains ammonium chloride solution?
The nucleon number of an isotope of bromine is 81.
How many protons, neutrons and electrons are present in an atom of this isotope?
Why does molten sodium chloride conduct electricity?
Four different solids, W, X, Y and Z, are dissolved in equal volumes of water at 20 oC.
The table shows the change in temperature when each solid dissolves.
Which row of the table describes the energy changes when each solid is dissolved in water?
Part of some chemical reactions are shown.
Which reaction represents oxidation?
A student test four different solutions with Universal Indicator.
What are the pH values of the four solutions?
Which row shows the properties of a Group 1 metal?
Which substance represents a metal?
Water is formed when hydrogen is passed over the heated oxide of metal L.
No water is formed when hydrogen is passed over the heated oxide of metal M.
Which row shows the order of reactivity of hydrogen, metal L and metal M?
Which row does not match an atmospheric pollutant to its source?
Naphtha is one fraction obtained from the fractional distillation of petroleum.
What is the main use of naphtha?
Alkanes are a homologous series of compounds.
The properties of the alkanes change as the size of molecules increases.
How do the properties change?
Which hydrocarbon is an alkene?
The repeat unit of poly(propene) is shown.
Which row is correct?
An organic compound E reacts with acidified potassium manganate(VII) solution causing it to change colour.
What is E?
