Sulphur Extraction and Properties Quiz

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What is the primary method used to extract sulphur from underground deposits?

The Frasch process (correct)
The Ostwald process
The Haber process
The Contact process

Sulphur is found abundantly in the Earth's crust as a metallic element.

False (B)

Name one environmental problem associated with the presence of sulphur in natural gas and oil.

Environmental pollution

The molten sulphur collected from the Frasch process is approximately _____% pure.

99.5 Signup and view all the answers

Match the following uses of sulphur with their descriptions:

Manufacture of sulphuric acid = Used in car batteries and fertilizers Sulphate production = Salts formed from sulphuric acid Soapless detergent production = Used in household cleaning products Signup and view all the answers

Which of the following describes the main allotropes of sulphur?

Rhombic sulphur and monoclinic sulphur (C) Signup and view all the answers

Rhombic sulphur is stable above 96°C.

False (B) Signup and view all the answers

What happens to sulphur when it is heated above the transition temperature?

It becomes a viscous liquid and creates longer chains of $S_8$ atoms. Signup and view all the answers

Sulphur is insoluble in water but soluble in __________.

organic solvents Signup and view all the answers

Match the following types of sulphur with their characteristics:

Rhombic sulphur = Stable below 96°C Monoclinic sulphur = Stable above 96°C Plastic sulphur = Forms when liquid sulphur is poured into cold water $S_8$ molecules = Ring structure of sulphur molecules Signup and view all the answers

Which of the following statements about sulphur is true?

Sulphur is a yellow, brittle solid that does not conduct electricity. (B) Signup and view all the answers

Sulphur dioxide is a colorless gas with a pleasant smell.

False (B) Signup and view all the answers

What is produced when sulphur dioxide dissolves in water?

sulphurous acid Signup and view all the answers

The major source of sulphur dioxide emissions comes from ______, accounting for 60% of its total production.

power stations Signup and view all the answers

Match the following sources of sulphur dioxide with their corresponding percentage contributions:

Power stations = 60% Industry = 18% Domestic = 11% Others = 11% Signup and view all the answers

What type of salts can dilute sulphuric acid form?

Both normal and acid salts (B) Signup and view all the answers

Dilute sulphuric acid can react with reactive metals to produce carbon dioxide.

False (B) Signup and view all the answers

What is produced when dilute sulphuric acid reacts with sodium hydroxide?

Sodium sulfate and water Signup and view all the answers

When preparing acid salts, ______ cm³ of dilute sulfuric acid is needed compared to the preparation of normal salts if 25 cm³ is used for normal salts.

50 Signup and view all the answers

Match the following reactions with their products:

Dilute sulphuric acid + Sodium hydroxide = Sodium sulfate + Water Dilute sulphuric acid + Zinc = Zinc sulfate + Hydrogen gas Dilute sulphuric acid + Copper(II) oxide = Copper sulfate + Water Dilute sulphuric acid + Carbonate = Normal salt + Carbon dioxide + Water Signup and view all the answers

What process do plants use to absorb CO₂?

Photosynthesis (D) Signup and view all the answers

The burning of fossil fuels decreases the amount of CO₂ in the atmosphere.

False (B) Signup and view all the answers

What is the primary role of greenhouse gases in the atmosphere?

Trapping heat Signup and view all the answers

Animals breathe in oxygen and breathe out ______ through respiration.

CO₂ Signup and view all the answers

Match the following components of the carbon cycle with their actions:

Plants = Absorb CO₂ Animals = Breathe out CO₂ Fossil Fuels = Release CO₂ Decay = Return CO₂ to the atmosphere Signup and view all the answers

What is produced when a sulfate is present during the identification test?

A white precipitate (D) Signup and view all the answers

Concentrated sulphuric acid can act as a dehydrating agent.

True (A) Signup and view all the answers

What is the formula for Ammonium sulphate?

(NH4)2SO4 Signup and view all the answers

The reaction of hydrated copper(II) sulphate with concentrated sulphuric acid produces _____ and water.

anhydrous copper(II) sulphate Signup and view all the answers

Match the following metal sulfates with their corresponding uses:

Ammonium sulphate = Fertilizer Barium sulphate = Used in medical X-ray studies Calcium sulphate = Plaster of Paris and laxative Magnesium sulphate = Used as a laxative Signup and view all the answers

What is the primary concern with the early anaesthetic chloroform (CHCl₃)?

It has a narrow therapeutic range. (D) Signup and view all the answers

CFCs are believed to contribute to the depletion of the ozone layer.

True (A) Signup and view all the answers

What serious health risk is associated with prolonged exposure to halothane?

liver damage Signup and view all the answers

The ozone layer is located between _ km and _ km above sea level.

25, 50 Signup and view all the answers

Match the following substances with their associated information:

Chloroform = Early anaesthetic with a narrow therapeutic range Halothane = Anaesthetic that may cause liver damage CFC-12 = Propellant implicated in ozone depletion Ozone = Gas that protects against UV radiation Signup and view all the answers

Which of the following are products made from sulphuric acid? (Select all that apply)

Fertilisers (A), Paints and pigments (B), Dyes and artificial fibres (D) Signup and view all the answers

The Contact process involves the production of sulphur dioxide from sulphur and water.

False (B) Signup and view all the answers

What catalyst is used in the Contact process for converting sulphur dioxide to sulphur trioxide?

Vanadium(V) oxide Signup and view all the answers

The reaction that produces sulphur trioxide from sulphur dioxide is __________.

exothermic Signup and view all the answers

Match the following chemical reactions with their descriptions:

$S_{8(s)} + O_{2(g)} ightarrow 8SO_{2(g)}$ = Formation of sulphur dioxide $2SO_{2(g)} + O_{2(g)} ightarrow 2SO_{3(g)}$ = Formation of sulphur trioxide $SO_{3(g)} + H_{2}O_{(l)} ightarrow H_{2}SO_{4(l)}$ = Formation of sulphuric acid Signup and view all the answers

At what temperature does the reaction between sulphur dioxide and oxygen occur in the Contact process?

450°C (B) Signup and view all the answers

Increasing the proportion of sulphur trioxide in the equilibrium mixture is favored by high temperatures.

False (B) Signup and view all the answers

What is the main environmental concern with the production of sulphur dioxide?

Acid rain Signup and view all the answers

The percentage of sulphuric acid used for __________ is 2%.

fertilisers Signup and view all the answers

Which of the following is an example of a basic oxide?

Sodium oxide (A) Signup and view all the answers

Acidic oxides can also be referred to as acid anhydrides.

True (A) Signup and view all the answers

What is the reaction of lithium oxide with water?

Li₂O + H₂O → 2LiOH Signup and view all the answers

Sulfur dioxide has the chemical formula ______.

SO₂ Signup and view all the answers

Match the following oxides with their respective type:

Li₂O = Basic Oxide CO₂ = Acidic Oxide MgO = Basic Oxide SO₃ = Acidic Oxide Signup and view all the answers

Which of the following oxides is classified as acidic?

Carbon dioxide (CO₂) (A) Signup and view all the answers

Zinc oxide is considered a neutral oxide.

False (B) Signup and view all the answers

Which type of oxide does lead oxide (PbO) belong to?

Amphoteric Signup and view all the answers

Carbon monoxide is classified as a __________ oxide.

neutral Signup and view all the answers

Match the following oxides with their classifications:

Carbon dioxide (CO₂) = Acidic Copper (II) oxide (CuO) = Basic Zinc oxide (ZnO) = Amphoteric Water (H₂O) = Neutral Signup and view all the answers

Frasch Process

A method to extract sulphur from underground deposits using superheated water and compressed air.

Sulphur Extraction Locations

Sulphur is often found in deposits beneath the earth's surface, including those in Poland, Russia, and the US (Louisiana).