BGCSE Sulfur

Why is sulfuric acid used in car batteries? (2010)

• It is an electrolyte and is not decomposed by electricity.

• It is an electrolyte and is decomposed by electricity.

• It is a non-electrolyte and is decomposed by electricity.

• It is a non-electrolyte and is not decomposed by electricity.

What gas is produced when copper metal reacts with concentrated sulfuric acid and what is the test for this gas? (2010)

• Hydrogen gas- makes a pop with a lighted splint

• carbon dioxide- turns lime water milky

• sulfur dioxide- turns blue litmus paper red

• oxygen- relights a glowing splint.

When concentrated sulfuric acid is added to sucrose a chemical reaction takes place. What are the correct observations which should be recorded by the chemistry student? (2010)

• sucrose turns from white to gray and the container feels hot

• sucrose turns from white to black and the container feels cold

• sucrose turns from white to black and the container feels hot

• sucrose turns from back to white and the container feels cold

In the Contact process, sulfur dioxide reacts with oxygen to give sulfur trioxide. What are the values of x, y and z in the equation, respectively? (2010)

xSO_{2 (g)} + yO_{2 (g)} ----> zSO_{3 (g)}

• 1,2,3

• 2,1,2

• 1,2,2

• 2,1,3

Sulfur dioxide is returned to the earth as an acid every time it rains. What is the name of the acid formed? (2010)

• sulfuric acid

• sulfurous acid

• aqueous hydrogen sulfide

• thiosulfate solution

Sulfur dioxide is the anhydride of which acid? (2011)

• hydrosulfuric acid

• hydrosulfurous acid

• sulfurous acid

• sulfuric acid

What is the formula of the sulfite radical? (2012)

• S

• S^-2

• SO₃ ^-2

• SO₃

Rhombic and monoclinic are two solid forms of elemental sulfur. What term best describes these forms of sulfur? (2012)

• allotropes

• alloys

• isomers

• isotopes

What is sulfuric acid ( H₂SO₄) an example of? (2012)

• binary acid

• carboxylic acid

• dibasic acid

• weak acid

Which of the following is true about sulfuric acid? (2013)

• It is a poor conductor of electricity

• It has a pH less than 7

• It will react with copper to produce hydrogen gas

• It has no reaction with zinc carbonate