Cambridge IGCSE Chemistry 0620/22

Which two gases will diffuse at the same rate, at the same temperature?

• carbon monoxide and carbon dioxide

• carbon monoxide and nitrogen

• chlorine and fluorine

• nitrogen and oxygen

A student measures the time taken for 2.0g of magnesium to dissolve in 50 cm3 of dilute sulfuric acid. Which apparatus is essential to complete the experiment?

• stop-clock

• measuring cylinder

• thermometer

• balance

A chromatogram of a single substance T is shown. Which measurements are used to find the Rf value of T?

• 1 and 2

• 1 and 4

• 2 and 3

• 3 and 4

X and Y are two different elements. X and Y have the same number of nucleons. Which statement about X and Y is correct?

• They have the same physical properties.

• Their atoms have the same number of electrons.

• They are in different groups of the Periodic Table.

• They have different relative masses.

The diagrams show the structures of three macromolecules P, Q and R. What are P, Q and R?

• diamond silicon(IV) oxide graphite

• graphite diamond silicon(IV) oxide

• silicon(IV) oxide diamond graphite

• silicon(IV) oxide graphite diamond

Which dot-and-cross diagram shows the arrangement of outer shell electrons in a molecule of hydrogen chloride?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The equation for the reaction between barium chloride and dilute sulfuric acid is shown. Which row shows the state symbols for this equation?

• (aq) (aq) (s) (aq)

• (aq) (l) (s) (aq)

• (l) (aq) (s) (l)

• (aq) (l) (aq) (l)

Methane and steam react in the presence of a catalyst. 0.5 mol of methane reacts completely with 0.5 mol of steam. What is the volume of carbon monoxide and hydrogen produced, measured at room temperature and pressure?

• 0.5 1.5

• 1.0 3.0

• 12.0 12.0

• 12.0 36.0

A compound of element X has the formula X2O and a relative formula mass of 144. What is element X?

• copper, Cu

• gadolinium, Gd

• sulfur, S

• tellurium, Te

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The diagram shows the electrolysis of concentrated hydrochloric acid and molten sodium chloride using carbon electrodes. At which electrodes is gas produced?

• electrode 1 only

• electrodes 1 and 3

• electrode 2,4 only

• electrodes1, 2 and 4