Plants with breathing roots are characteristic features of vegetation in

• A. tropical grassland
• B. temperate grassland
• C. saltwater swamp
• D. Tropical rain forest

The inability of an organism to adapt to its habitat can lead to

• A. dormancy
• B. adaptation
• C. extinction
• D. survival

The pauper in Richard Ntiru's poem of that title is

• A. hungry,lonely and sad
• B. lonely, dirty but happy
• C. dirty, hungry and terrified
• D. hungry,lonely and diseased

Which of the following refers to sale promotion?

• A. Non- personal presentation of a product
• B. Offering free samples of products
• C. Providing information about a company and its product
• D. Direct contact with the ultimate buyer

The organelle common to both plant and animal cells is the

• A. centrioles
• B. plasmalemma
• C. cell wall
• D. chloroplast

The cast appears at the end of a play for the ___________-

• A. Musical
• B. Curtain Call
• C. Intermission
• D. Introduction

Ethene molecules can be added to one another to form a long chain compound called a

• A. dimer
• B. monomer
• C. polymer
• D. trimer

A radio wave has a wavelength of 150m. If the velocity of radio waves is free spaces is 3 x 10\(^8\) ms\(^{-1}\), calculate the frequency of the radio wave

• A. 4.50 x 10¹⁰Hz
• B. 5.0 x 10⁹Hz
• C. 4.5 x 10⁹Hz
• D. 2.0 x 10⁶Hz

Sexual propagation involves the use of

• A. buds
• B. seeds
• C. cuttings
• D. vines

(a)(i) Define allotropy.

(ii) Name the allotrope of carbon used in gas masks.

(iii) Mention two other elements which exhibit allotropy apart from carbon.

(b) List the products of each of the following reactions:

(i) Heating coal in the absence of air.

(ii) Burning of candle wax in plentiful supply of air

(c)(i) State the two properties of carbon (IV) oxide which make it useful in extinguishing fire.

(ii) Write an equation for the reaction of carbon (IV) oxide with lime water

(iii) Calculate the volume of oxygen that was in excess if 150cm\(^3\) of carbon (II) oxide was burnt in 80cm\(^3\) of oxygen according to the following equation: 2CO\(_{(g)}\) + O\(_{2(g)}\) \(\to\) 2CO\(_{2(g)}\).

(d)(i) State how nitrogen can be obtained from ammonia gas.

(ii) Name the gaseous fuels obtained when steam and air are passed over red hot coke.

(iii) Which of the fuels in (d)(ii) has the lower heating ability? Give reason for your answer.