Search SchoolNGR

Chemistry Past Questions and Answers

Neco Chemistry Questions

Question 26:

The use of sulphur to vulcanize rubber is mad to make it ____________

SchoolNGR Classroom

A Blacker.
B Cheaper. .
C More elastic
D Tougher
E Softer.

View Answer & Explanation

Question 27:

Which element contains the greatest number of moles?

SchoolNGR Classroom

A 8 g of Helium
B 48 g of Carbon
C 78 g of Potassium
D 130g of Zinc
E 216g of Sliver

View Answer & Explanation

Question 28:

The position of an element in the Periodic Table is determined by ____________

SchoolNGR Classroom

A Its atomic radius.
B Its density.
C Its relative atomic mass.
D The number of protons in its atom.
E The number of neutrons in its atoms

View Answer & Explanation

Question 29:

what dose the following equation illustrate? \( ^{238}U_{92} → ^{234}Th_{90} + ^4 He_2 \)

SchoolNGR Classroom

A Artificial radioactivity
B Nuclear fission
C Nuclear fusion
D Radio-decomposition
E Spontaneous disintegration

View Answer & Explanation

Question 30:

Which compound can be used as a reducing agent in a reaction?

SchoolNGR Classroom

A Cl₂
B KMnO₄
C KCr₂O₇
D MnO₂
E Na₂SO₃

View Answer & Explanation

Stay Updated

Follow us on:

Subjects