Neco Chemistry 2008 Past Questions and Answers

Question 31:

• NECO 2008

Which of the following will Increase the rate of reaction of Chips of a metal M as shown in the equation below?

M(s)+2HC1(aq) → MCI₂ (aq) + H₂(g)

A. Adding some distilled water
B. Decreasing the temperature
C. Diluting the hydrochloric acid
D. Grinding the metal into powder
E. Increasing the pressure

Question 32:

• NECO 2008

Which of the following is a component of the car exhaust?

A. Aluminium
B. Calcium
C. Iron
D. Zinc
E. Lead

Question 33:

• NECO 2008

The molecular formula of ethylbutanoate is?

A. C_{[/sub]H[sub]5}COOC₂6
B. C₃H_{[/sub]COOC[sub]2}H₇
C. C₃H₇COOC₃H₇
D. C₃H₇COOC₄H₉
E. C₃H₇COOC₂H₅

Question 34:

• NECO 2008

The rate of a chemical reaction is NOT affected by one of these factors

A. Colour
B. Concentration
C. Presence of light
D. Surface area
E. Temperature

Question 35:

• NECO 2008

Pipe-borne water is usually chlorinated in order to ____________

A. Coagulate sediments in the water
B. Improve taste of the water
C. Kill harmful bacteria in the water
D. Make it pure
E. Remove the hardness in the water