MCQ

CH2 - SEPARATING SUBSTANCES

Impurities change the melting and boiling points of substances.Sodium chloride is added to a sample of pure water.How does the addition of sodium chlo...

2017 Summer

1

MCQ

CH2 - SEPARATING SUBSTANCES

In the chromatography experiment shown, which label represents the solvent front?

2016 Summer

2

MCQ

CH2 - SEPARATING SUBSTANCES

The diagram shows a chromatogram of four substances. Which substance has an $R_f$ value of approximately 0.32?

2017 Summer

1

MCQ

CH2 - SEPARATING SUBSTANCES

X is a mixture of colourless compounds. The diagram shows a chromatogram of X and of three pure compounds, P, Q, and R. Which statement is not correct...

2016 Summer

2

MCQ

CH2 - SEPARATING SUBSTANCES

The flow chart shows stages in the treatment of river water to produce drinking water. What occurs at stages X and Y?

2017 Winter

1

MCQ

CH2 - SEPARATING SUBSTANCES

During an experiment a measurement is recorded in cm$^3$.Which apparatus is used?

2017 Winter

1

MCQ

CH2 - SEPARATING SUBSTANCES

A student mixes 25 cm$^3$ samples of dilute hydrochloric acid with different volumes of aqueous sodium hydroxide. In each case, the student measures t...

2016 Winter

2

MCQ

CH2 - SEPARATING SUBSTANCES

A student carried out paper chromatography on a mixture of amino acids. The student sprayed the dried chromatogram with a locating agent. What is the ...

2017 Winter

2

MCQ

CH2 - SEPARATING SUBSTANCES

A sample contains a mixture of powdered limestone (calcium carbonate), sugar and wax.What is the correct way to obtain a pure sample of sugar?

2016 Winter

2

MCQ

CH2 - SEPARATING SUBSTANCES

Silver nitrate reacts with sodium chloride to produce silver chloride and sodium nitrate. The equation for the reaction is shown.$\text{AgNO}_3(\text{...

2017 Summer

1

Theory

CH3 - ATOMS AND ELEMENTS

The table shows the numbers of protons, neutrons and electrons in particles A to I.[Table_1]Answer the following questions about particles A to I. Eac...

2021 Spring

1

Theory

CH15 - AIR AND WATER

The elements shown are gases at room temperature and pressure.hydrogennitrogenoxygenchlorine(a) State which one of these gases is green..................

2021 Spring

1

Theory

CH16 - SOME NON-METALS AND THEIR COMPOUNDS

This question is about ammonia.(a) Nitrogen reacts with hydrogen to form ammonia in an industrial process.$$N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(...

2021 Spring

1

Theory

Stoichiometry

A student wanted to make some zinc chloride crystals. The student followed the procedure shown. step 1 Add excess zinc powder to dilute hydrochlor...

2021 Spring

2

Theory

Plastics

The table shows the names or structures of organic compounds P to U. (a) Give the letters of the organic compounds, P to U, that are unsaturated hy...

2021 Spring

1

Theory

CH18 - POLYMERS

Polymers are large molecules built up from small molecules.(a) State the name given to the small molecules from which polymers are made..................

2021 Spring

2

MCQ

CH1 - STATES OF MATTER

A gas is released at point P in the apparatus shown. Which gas turns the damp universal indicator paper red most quickly?

2021 Summer

2

MCQ

CH2 - SEPARATING SUBSTANCES

A mixture is separated using the apparatus shown. What is the mixture?

2021 Summer

2

MCQ

CH2 - SEPARATING SUBSTANCES

Which statement about paper chromatography is correct?

2021 Summer

2

MCQ

CH3 - ATOMS AND ELEMENTS

Element X has 7 protons. Element Y has 8 more protons than X. Which statement about element Y is correct?

2021 Summer

1