Past Questions And Answers
The determination of the matrix \(\begin{pmatrix} 1 & 3 & 3 \\ 4 & 5 & 6\\ 2 & 0 & 1 \end{pmatrix}\) is
- A. -67
- B. -57
- C. -3
- D. 3
In which part of the kidney does ultrafiltration take place?
- A. Bowman
- B. Distal convoluted tubule
- C. Proximal convoluted tubule
- D. Collecting duct
Which of these statements are TRUE of pressure in liquids? i. pressure acts equally in all direction. ii. pressure decreases with depth. iii. pressure at the same level of a liquid is the same. iv pressure is dependent on the cross-sectional area of the barometer tube
- A. i, iii only
- B. i, ii, iii only
- C. i, iii, and iv only
- D. i, ii, iii and iv
In a country, if the proportion of people who are below 15 years is 45% and those above 60 years is 30%, this implies that the?
- A. dependency is ratio high
- B. population is optimum
- C. active population is large
- D. population is growing according to Malthus theory
Angel Jibril asked the Prophet (SAW) to read during the event of the first revelation
- A. four times
- B. three times
- C. twice
- D. once
Which of the following mountains is not a fold mountain?
- A. the atlas
- B. the andes
- C. the vosges
- D. the himalayas
An accounting ratio that considers only quick assets to determine the short-term safety margin of a firm is the?
- A. fixed assets ratio
- B. capital gearing ratio
- C. current assets ratio
- D. acid test ratio
_________ is not sex-linked
- A) stunted growth
- B) river blindness
- C) haemophilia
- D) colour blindness
A basic postulate of the kinetic theory of gases is that the molecules of a gas move in straight lines between collisions. This implies that?
- A. collisions are perfectly elastic
- B. forces of repulsion exist
- C. forces of repulsion are in equilibrium
- D. collision are inelastic
(a) The electronic configurations of atoms of elements A, B, C and D are given as follows: A. Is\(^2\)2s\(^2\)2p\(^2\); B. 1s\(^2\)2s\(^2\)2sp\(^1\) ; C. 1s\(^2\)2s\(^2\) 2p\(^1\) ; D. 1s\(^2\) 2s\(^2\)
(I) Arrange the elements in order of increasing atomic size, giving reasons
(ii) State which of the elements I. is divalent II. contains atoms with two unpaired electrons in the grouped state. Ill, readily loses one electron from its atom during chemical bonding IV. belongs to group Ill in the Periodic Table.
(b)(i) State one difference between electrovalent and covalent bonds.
(ii) Name two other bonds apart from the ones in (b)(i) above which bind atoms and molecules together.
(iii) State two characteristics of a covalent compound.
(c)(i) What is isotopy?
(ii) Illustrate with suitable example
(iii) Two isotopes of Z with mass numbers 18 and 20 are in the ratio 1:2 Determine the relative atomic mass of Z.
(d)(i) Which of the following elements: calcium, fluorine, iodine neon, magnesium and helium are I. halogens II. noble gases Ill. alkaline earth metals.
(ii) Write a balanced equation for the bombardment of \(^7_3Li\) with protons to produce \(^8_4\beta\) and \(\gamma\)-rays
(iii) State one use of radioactive isotopes.
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