(a)(i) List the three types of particles present in atoms.

(ii) name the element which does not contain all the three particles in its atom. Mention the particle that is not present.

(b) Give the reason why:

(i) the relative atomic masses of some elements are not whole number;

(ii) relative atomic masses are used instead of the actual masses of atoms in grams;

(iii) metals are good conductors of electricity.

(c)(i) Name the type of bond present in the oxonium ion,

(ii) State one effect of the existence of intermolecular hydrogen bonding on the physical properties of ethanol.

(d)(i) Explain what is meant by water of crystallization.

(ii) When 5.0g of a compound Y was heated to constant mass, 1.8g of water vapour was given off. Determine the number of molecules of water of crystallization in one molecule of Y, given that the molar mass of its anhydrous form is 160g. [H = 1, 0 = 16]

The battle of Badr was fought in _______ year AH.

• A. 2nd
• B. 3rd
• C. 4th
• D. 6th

Sales - #232,000 Opening stock - # 28,000 Purchases - #128,000 Carriage inwards - # 4,000 Carriage outwards - # 6,000 Closing stock - # 10,000 Discount received - # 18,000 Expenses - # 20,000 Calculate the gross profit

• A. #100,000
• B. #86,000
• C. #82,000
• D. #76,000

The energy stored in a spring of stiffness constant k = 2000\(Nm^{-1}\) when extended 4cm is

• A. 0.16J
• B. 1.60J
• C. 16.00J
• D. 160.00J

Supply of agricultural products is likely to be elastic in the

• A. intermediate period
• B. long-run
• C. market period
• D. short-run

One of the major complaint against public service is

• A. inefficiency
• B. under staffing
• C. victimization
• D. discrimination

A constitutional function of the local governments is the

• A. provision of security guards for streets
• B. provision of market stalls and motor parks
• C. control of prison services
• D. collection of duties on goods

Nigeria declared that she would not attend the OAU summit in Tripoli in 1982 unless

• A. Colnel Gaddafi resigned as the Libyan Head of State
• B. Libya withdrew her troops from Chad
• C. President Shehu Shagari became the chairman of OAU
• D. Cameroon was suspended for killing Nigerian soldiers at Bakassi

A feature of pressure groups is that members

• A. oppose the government
• B. are in the same labour union
• C. do not believe in dialogue
• D. have similar interests

Promoting and offering of company's products and services for sale over the internet is electronic

• A. mail
• B. purchasing
• C. marketing
• D. commerce