Which of the following instruments is used to estimate the number of plants in a habitat?

• A. pooter
• B. pitfall trap
• C. quadrant
• D. sweep net

A one party system imposed by law with all other parties proscribed is

• A. a social party system
• B. a de jure one party system
• C. a communist political system
• D. an elitist party system

The Quantity Theory of Money state that an increase in the quantity of money would bring about

• A. a geometrical rise in price
• B. an unequal rise in prices
• C. a proportionate rise in prices
• D. an absolute rise in prices

(a)(i) Define each of the following terms: I. normal salt. II. acid salt.

(ii) Tetraoxosulphate (VI) acid and sodium hydroxide react to produce salt and water. Write a balanced chemical equation fir the formation of: I. a normal salt; II. an acid salt.

(b)(i) Explain briefly the term acid-base indicator.

(ii) Copy and complete the following table.

(iii) For each of the following titrations, state the most suitable indicator: I. strong acid against strong base; II. strong acid against weak base; iii. weak acid against strong base.

(c) Baking soda and hydrochloric acid react according to the following equation:

NaHCO\(_{3(aq)}\) + HCI\(_{(aq)}\) ---> NaCl\(_{(aq)}\) CO\(_{2(g)}\) + H\(_2\)O\(_{(l)}\). Calculate the mass of baking soda that would produce 10g of ccrbon (IV) oxide. [H = 1.00, C = 12.0, 0 = 16.0, Na = 23.0]

(d) Give a reason why a given mass of sodium hydroxide pellets cannot be used to prepare a standard solution.

NaHCO\(_3\) + HCI --> NaCI + CO\(_2\) + H\(_2\)O

84g NaHCO\(_3\) --> 44g CO\(_2\)

Xg --> 10g CO\(_2\)

Xg = \(\frac{84 \times 10}{44}\)

= 19.09g

= 19.1g.

(d) give a reason why a given mass of sodium hydroxide pellets cannot be used to prepare a standard solution: Sodium hydroxide absorbs water/deliquescent and absorbs carbon IV oxide from air/and this would make mass taken unreliable/add to its mass.

If a light wave has a wavelength of 500nm in air what is the frequency of the wave? [c = 3 x 10⁸ ms^-1]

• A) 3.0 x 10¹⁴ Hz
• B) 6.0 x 10¹⁴ Hz
• C) 6.0 x 10¹² Hz
• D) 2.5 x 10¹⁴ Hz

A common repercussion for drug abuse is?

• A. medication
• B. rehabilitation
• C. brain drain
• D. memory loss

The right to vie for public office falls under

• A. economic rights
• B. political rights
• C. social rights
• D. religious rights

The practice of two or more sovereign states uniting for security and external affairs is called

• A. totalitarianism
• B. confederalism
• C. republicanism
• D. sectionalism

An aluminum foil is placed across a beam of radiation from a radioactive source. Which of the following types of radiation will be stopped by it?

• A. alpha and beta particles
• B. alpha and gamma particles
• C. beta and gamma particles
• D. gamma particles only

A house bought for N100,000 was later auctioned for N80,000. Find the loss percent.

• A. 20%
• B. 30%
• C. 40%
• D. 50%