Past Questions And Answers
Which of the following metals exists as liquid at ordinary temperature?
- A. Copper
- B. Gold
- C. Mercury
- D. Silver
Fruits which develop without fertilization are described as
- A. simple
- B. pathencorpic
- C. aggregate
- D. compound
Another name for control accounts is
- A. total account
- B. purchases ledger
- C. creditors' account
- D. debtors' account
(a)(i) Explain photoelectric emission.
(ii) State four applications of photoelectric emission.
(b) Draw and label a diagram showing the structure of a simple type of a photocell and explain its mode of operation.
(c) In a photocell, no electrons are emitted until the threshold frequency of light is reached.
(i) Explain what happens to the energy of the light before emission of electrons begin.
(ii) State one factor that may affect the number of emitted electrons.
View Discussion (0)WAEC 2003 THEORY.jpg)
The causative organism of Avian influenza is a
- A. bacterium
- B. virus
- C. fungus
- D. protozoan.
Read the poem and answer the question
Sleep, O sleep
With thy Rod of Incantation
Charm my Imagination,
Then, only then, I cease to weep
By thy power,
The virgin, by Time O' ertaken,
For Years forlorn, forsaken,
Enjoys the happy Hour.
What's to sleep?
'Tis a visionary Blessing;
A dream that's past expressing;
Our utmost Wish possessing;
So may I always keep.
The dominant device used in the first line is
- A. Oxymoron
- B. apostrophe
- C. rhyme
- D. metaphor
The pressure of one mole of an ideal gas of volume 10-2m3 at a temperature of 27°c is [molar gas constant = 8.3 J mol-1k-1]
- A) 2.49 x 104 Nm-2
- B) 2.24 x 104 Nm-2
- C) 2.49 x 105 Nm-1
- D) 2.24 x 105 Nm-1
Explain six aims and objectives of the Economic Community of West African States (ECOWAS).
View Discussion (0)WAEC 2005 THEORYA platinum resistance thermometer has a resistance 4\(\Omega\) at 0°C and 10\(\Omega\) at 100°C. Assuming the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45°C.
- A. 14.0\(\Omega\)
- B. 6.7\(\Omega\)
- C. 3.2\(\Omega\)
- D. 2.7\(\Omega\)
Which of the following metals can be prepared in samples by the thermal decomposition of their trioxonitrate (V) salts?
- A. Copper and mercury
- B. Silver and copper
- C. Mercury and silver
- D. Magnesium and mercury