Chemistry 2008 Neco Past Questions and Answers

Question 26 :

• NECO 2008

Chlorine atom forms Cl- by ____________

A. Donating lone pair of electrons
B. Gaining an electron
C. Losing an electron
D. Sharing an electron
E. Sharing a lone pair of electrons.

Question 27 :

• NECO 2008

The most efficient absorber of ultraviolet radiation in the atmosphere is ____________

A. CO₂
B. H₂
C. H₂O
D. 0₂
E. O₃

Question 28 :

• NECO 2008

When dust particles collide randomly in a beam of Sunlight, the phenomenon observed is known as ____________

A. Brownian movement.
B. Dialysis
C. Diffusion
D. Osmosis
E. Tyndall effect

Question 29 :

• NECO 2008

\( ^{234}_{90}Th → ^{234}_{91}Pa + X \)
In the nuclear reaction above, X is ____________

A. \( ^0_1e \)
B. \( ^0_{-1}e \)
C. \( ^4_2He \)
D. \( ^1_0n \)
E. \( ^1_1p\)

Question 30 :

• NECO 2008

What is the colour of phenolphthalein indicator in a basic medium?

A. Blue
B. Colourless
C. Orange
D. Pink
E. Yellow