Past Questions And Answers
An insulated rod when rubbed with a material acquires
- A. a negative charge if it is made of glass and rubbed with silk
- B. no charge if it is made of glass and rubbed with fur
- C. no charge if it is made of copper and rubbed with silk
- D. a positive charge if it is made of copper and rubbed with fur
In which of these are flagella and cilia found?
- A) flatworms
- B) protozoa
- C) coelenterates
- D) annelids
If he had entered the room, I ..........him
- A. saw
- B. had seen
- C. would have seen
- D. may see
Liquefied air is mainly a mixture of nitrogen and oxygen which can be separated into its components by fractional distillation (Boiling point of nitrogen is 196°C, Boiling point of oxygen is 174°C)
(a) Name the fraction which distills over first. Give the reason for your answer.
(b) Give another industrial application of fractional distillation as a separation technique.
View Discussion (0)WAEC 1990 THEORYThe process of taking part in the selection of leaders in a country is political?
- A. socialization
- B. participation
- C. interaction
- D. culture
The area covered by the map is approximately
- A. 1400 Km2
- B. 900 Km2
- C. 1950 Km2
- D. 1010 Km2
The first female Professor in Nigeria is ____
- A. Elfrida Adeho
- B. Sylvia Malomo
- C. Grace Alele Williams
- D. Shola Rotimi
The pH of a solution obtained by mixing 100cm3 of a 0.2M solution of NaOH is?
- A. 1.3
- B. 7.0
- C. 9.7
- D. 12.7
Lakes formed as a result of landslides, screes or avalanches are known as
- A. man-made lakes
- B. barrier lakes
- C. caldera lakes
- D. rock-hollow lakes
Leguminous cover crops do not
- A. bind the soil particles together through their roots
- B. increase the nitrogen content of soils
- C. aid in improving the soil organic matter content
- D. reduce the soil microbial population