Get premium membership and access questions with answers, video lessons as well as revision papers.

During the extraction of lead from its ores one of the main ore used is Galena

During the extraction of lead from its ores one of the main ore used is Galena

(i) Write an equation for the reaction in roasting furnace.
(ii) Name gas
(iii) State one use of lead metal.

Answers

(ii) Carbon (II) Oxide
(iii) – Used in making pipe or roofing materials
- Used in accumulation or for covering electric cables.
- It protects workers handling radioactive material as it absorbs harmful radiations
- In making alloys e.g. solder (Pb and Sn) type metal (Pb, Sb, Sn)

---

sharon kalunda answered the question on May 13, 2019 at 13:52

Next: Mr. Jackson Wabengo, the information communication manager of Vijana Enterprises Ltd. intends to change the operating system platform in his organisation. He intends to embrace open source...
Previous: Explain the following methods of organising computer file: i. Sequential file organisation. ii. Hash access file organisation.

View More Chemistry Questions and Answers | Return to Questions Index

Related Questions

• Study the scheme below and use it to answer the questions that follows.(Solved)
  

  Study the scheme below and use it to answer the questions that follows.
  
  Write down the formulae of two possible anions present in salt solution P.

  Date posted: May 13, 2019.  Answers (1)

• During a displacement reaction, excess iron powder was added to 25cm³ of 0.5 M copper (II) sulphate solutions. The temperature rose from 18.5^oC to 33.0^oC....(Solved)
  

  During a displacement reaction, excess iron powder was added to 25cm³ of 0.5 M copper (II) sulphate solutions. The temperature rose from 18.5^oC to 33.0^oC. Calculate the molar enthalpy of displacement of copper in copper (II) sulphate solution (Specific heat capacity is 4.2 Jg^-1K^-1, Density of the solution = 1.0g/cm³)

  Date posted: May 13, 2019.  Answers (1)

• Describe how you would prepare crystals of sodium nitrate starting with 200cm³ of 2M sodium hydroxide.(Solved)
  

  Describe how you would prepare crystals of sodium nitrate starting with 200cm³ of 2M
  sodium hydroxide.

  Date posted: May 13, 2019.  Answers (1)

• The diagram below shows a set –up for preparation of hydrogen chloride gas.(Solved)
  

  The diagram below shows a set –up for preparation of hydrogen chloride gas.
  
  Write the equation for the reaction that produces hydrogen chloride gas.

  Date posted: May 13, 2019.  Answers (1)

• The following table gives the melting points of oxides of elements in period 3. Study it and answer the questions that follow:-(Solved)
  

  The following table gives the melting points of oxides of elements in period 3. Study it and
  answer the questions that follow:-
  
  (i) Explain the difference in melting points of MgO and P₄O₁₀
  (ii) Name the compound in the above table that will dissolve both in dilute
  hydrochloride acid and dilute sodium hydroxide.

  Date posted: May 13, 2019.  Answers (1)

• 36cm³ of a solution of potassium hydroxide requires 25cm³ of 0.5M sulphuric acid to neutralize it.Calculate the concentration of alkali in g/dm³(Solved)
  

  36cm³ of a solution of potassium hydroxide requires 25cm³ of 0.5M sulphuric acid to
  neutralize it.Calculate the concentration of alkali in g/dm³

  Date posted: May 13, 2019.  Answers (1)

• Draw the structural formula of organic compound with the formula C₅H₁₀O₂ giving its name. (Solved)
  

  Draw the structural formula of organic compound with the formula C₅H₁₀O₂ giving its name.

  Date posted: May 13, 2019.  Answers (1)

• The diagram below represents set-up that can be used to prepare and collect oxygen gas(Solved)
  

  The diagram below represents set-up that can be used to prepare and collect oxygen gas
  
  a) Name solid P
  b) What property of oxygen makes it possible for its collection as indicated by the
  diagram.
  c) Explain why it is important not to collect any gas for the first few seconds of the
  experiment.

  Date posted: May 13, 2019.  Answers (1)

• Study the flow chart below and answer the questions that follow.(Solved)
  

  Study the flow chart below and answer the questions that follow.
  
  a) Identify N and P
  b) What name is given to the type of halogenation/Chlorination reaction in step 2

  Date posted: May 13, 2019.  Answers (1)

• During the electrolysis of dilute sulphuric (VI) acid the volume of hydrogen gas collected is twice the volume of oxygen gas. Using half equations justify the...(Solved)
  

  During the electrolysis of dilute sulphuric (VI) acid the volume of hydrogen gas collected is twice
  the volume of oxygen gas. Using half equations justify the above statement.

  Date posted: May 13, 2019.  Answers (1)

• Under certain conditions ,methane reacts with steam to form carbon (II) oxide and hydrogen only. Calculate the total volume of the gas that can be...(Solved)
  

  Under certain conditions ,methane reacts with steam to form carbon (II) oxide and hydrogen only. Calculate the total volume of the gas that can be formed when 100cm³ of steam reacts completely with methane.
  
  Calculate the enthalpy change of the reaction.
  

  Date posted: May 13, 2019.  Answers (1)

• Classify the following processes as either chemical or physical.(Solved)
  

  Classify the following processes as either chemical or physical.
  

  Date posted: May 13, 2019.  Answers (1)

• The equation for dissolution of bismuth(III) chloride in water is(Solved)
  

  The equation for dissolution of bismuth(III) chloride in water is
  
  Explain the effect on the position of equilibrium if sodium hydroxide solution is added to the mixture at equilibrium.

  Date posted: May 13, 2019.  Answers (1)

• State the Lechateiler’s principle.(Solved)
  

  State the Lechateiler’s principle.

  Date posted: May 13, 2019.  Answers (1)

• Carbon(IV) oxide is one of the main contributor to global warming. Name two other gases.(Solved)
  

  Carbon(IV) oxide is one of the main contributor to global warming.
  Name two other gases.

  Date posted: May 13, 2019.  Answers (1)

• Using a suitable equation explain why it is not advisable to use hardwater in hot water systems.(Solved)
  

  Using a suitable equation explain why it is not advisable to use hardwater in hot water
  systems.

  Date posted: May 13, 2019.  Answers (1)

• The catalytic oxidation of ammonia gas is done as per the set up below.(Solved)
  

  The catalytic oxidation of ammonia gas is done as per the set up below.
  
  a) Name the catalyst used in the above reaction.
  b) After sometime, brown fumes are formed in the flask. Explain briefly how this
  observation occurs.
  c) Why does the metal catalyst stay red hot for some time?

  Date posted: May 13, 2019.  Answers (1)

• Below is a table of 1^st ionization energies for elements A,B,C, and D which are metals.(Solved)
  

  Below is a table of 1^st ionization energies for elements A,B,C, and D which are metals.
  
  a) What is meant by 1^st ionization energy?
  b) With an explanation, arrange the elements in order of increasing reactivities.

  Date posted: May 13, 2019.  Answers (1)

• Hydrogen gas is one of the lightest gas known but has not lived to its expectation to be used inObservation balloons. Explain(Solved)
  

  Hydrogen gas is one of the lightest gas known but has not lived to its expectation to be used inObservation balloons. Explain

  Date posted: May 13, 2019.  Answers (1)

• Describe how you would prepare a sample of iron(II)carbonate,starting with iron metal and dilute hydrochloric acid.(Solved)
  

  Describe how you would prepare a sample of iron(II)carbonate,starting with iron metal and dilute hydrochloric acid.

  Date posted: May 13, 2019.  Answers (1)