Past Questions And Answers
Potassium vapour burns with a
- A. blue flame
- B. brick-red flame
- C. violet flame
- D. golden-yellow flame
(a)(i) List two physical properties used as criteria for purity of substances
(ii) describe how you would prepare a pure, dry sample of sodium chloride crystals by a neutralization reaction, using bench reagents.
(iii) Give two other general methods for preparing soluble salts.
(b) Explain the following observations:
(i) a sheet of iron placed in dilute copper (II) tetraoxosulphate (VI) solution reddish brown;
(ii) the white gelatinous precipitate formed when a few drops of sodium hydroxide solution are added to a solution of aluminium salt dissolves in excess alkali;
(iii) the pale green prepared iron(II) chloride solution changes to brown on bubbling chlorine gas through it.
(iv) Write a balanced equation for the reaction of dilute hydrochloric acid with marble. List two industrial process in which limestone is used as a raw material.
View Discussion (0)WAEC 1990 THEORY(a) Draw a sketch map of Nigeria. On the map, locate and name:
(i) the Kainji dam:
(ii) Lake Chad
(iii) Ibadan.
(b) Highlight three factors that impede the development of solar energy in Nigeria
(c) Explain four problems created by the construction of the Kainji dam in Nigeria.
View Discussion (0)WAEC 2021 THEORYThe contents of surah al fatihah can be summed up to mean that
- A. mercy is always from Allah
- B. man must always fear Allah and obey Him
- C. man must worship Allah and seek His help
- D. it is the first surah that was revealed
The correct entries to record goods transferred to branch from head office is to debit?
- A. branch stock account and credit goods sent to branch account
- B. branch supplies account and credit branch stock account
- C. branch stock account and credit purchases account
- D. goods sent to branch account and credit branch stock account
A physical restriction placed on the quantity of goods that can be imported is
- A. a ban
- B. a quota
- C. an excise duty
- D. an import tax
In a cabinet system, the legislature comprises of the
- A. prime minister and members of the parliament
- B. prime minister and members of the jury
- C. prime minister and ministers
- D. president and ministers
What is a Quota?
- A. Tax pad on goods produced within a country
- B. A physical restriction placed on quantity of goods that can be imported
- C. Tax paid on goods produced outside a country
- D. Ban on all imported goods
Absolute obedience to the Prophet's teaching is stated in an Nawawi's Hadith
- A. 16
- B. 18
- C. 34
- D. 41
In Collosians, Christians are advised to be diligent at work because in so doing, they are
- A. serving God
- B. exalting themselves
- C. challenging unbelievers
- D. worthy of heaven