NECO GCE Chemistry Questions and Answers Objective and Theory Update

Filed in Education by on January 13, 2022

– NECO GCE Chemistry Questions –

NECO GCE Chemistry is out now on our website. In this article, I will show you past NECO GCE Chemistry random repeated questions for free.

About NECO

The establishment of the National Examinations Council (NECO) in April 1999 is a culmination of the reaction of the Federal Government.

This was to widespread escalating agitations for a national examination outfit that would respond to the Nigerian needs and demands.

As well as cope with the annually increasing number of secondary school candidates to take Senior School Certificate Examination (SSCE) nationwide.

A Series of panels had earlier been set up to address the issues before this vital decision was taken.

The Mission

To deliver examinations whose results are trusted worldwide for their credibility.

The Vision

To become a major player in the global assessment industry.

Core Value

Redefining the future of the Nigerian child through quality assessment.

The National Examinations Council (also known as NECO) is an examination body in Nigeria that conducts the Senior Secondary Certificate Examination and the General Certificate in Education in June/July and December/January, respectively.

NECO GCE Chemistry Questions and Answers

This Neco chemistry exam is for Papers III & II: Objective & Essay and will take a total of 3hrs to write. Here, we will post out the neco chemistry questions for candidates that will participate in the examination.

neco chemistry questions 2017

Neco Chemistry Objective Study Questions

NOTE: That there is nothing like Neco expo chemistry online. Do not be deceived by fraudsters posing with fake NECO answers on the internet.

1. A sample of air collected at STP contains 0.039 moles of N2, 0.010 moles of O2, and 0.001 moles of Ar. (Assume no other gases are present.)

a) Find the partial pressure of O2.

b) What is the volume of the container?

2. A sample of hydrogen gas (H2) is collected over water at 19°C.

a) What are the partial pressures of H2 and water vapor if the total pressure is 756 mm Hg?

b) What is the partial pressure of hydrogen gas in atmospheres?

3. If 600. cm3 of H2 at 25°C and 750. mm Hg is compressed to a volume of 480. cm3 at 41°C, what does the pressure become?

4. Find the density of helium gas at STP.

5. a) Write a balanced chemical equation for the reaction of butane gas with oxygen gas to form carbon dioxide and water vapor.

b) How many liters of oxygen are required to produce 2.0 liters of CO2?

c) How many liters of CO2 are produced from 11.6 g of butane at STP?

d) How many molecules of water vapor are produced from 5.6 liters of butane gas at STP?

6. Find the molar volume of a gas at 68°C and 2.00 atmospheres pressure.

7. How many liters of methane are there in 8.00 grams at STP?

8. Calculate the density of carbon dioxide at 546 K and 4.00 atmospheres pressure.

9.  What volume of O2 at 710. mm Hg pressure and 36°C is required to react with 6.52 g of CuS?
CuS(s) + 2 O2(g)   ®    CuSO4(s)

10. What is the molar mass of a gas if 7.00 grams occupy 6.20 liters at 29°C and 760. mm Hg pressure?

11. At a particular temperature and pressure, 15.0 g of CO2 occupy 7.16 liters.  What is the volume of 12.0 g of CH4 at the same temperature and pressure?

12.  To prepare a sample of hydrogen gas, a student reacts 7.78 grams of zinc with acid:

Zn(s)   +   2 H+ (aq)    ®    Zn2+(aq)   +   H2(g)

The hydrogen is collected over water at 22°C and the total pressure of gas collected is 750. mm Hg. What is the partial pressure of H2?  What volume of wet hydrogen gas is collected?

neco 2017 answers ssce

neco objective question

Neco Chemistry Objective Study Questions

Focus Areas – Gases:

1. Kinetic-molecular theory

2. pressure

3. barometer, manometer

4. temperature

5. absolute zero temperature

6. relationship between pressure, volume, temperature

7. Boyle’s Law

8. Charles’ Law

9. Ideal Gas Law R = 0.08206  L atm/mol K

10. molar volume

11. STP

12. molar volume @ STP = 22.4 L

13. molar mass and density of a gas

14. gas stoichiometry

15. partial pressure.

Keep visiting this page as updates will be made on Neco Chemistry Questions for candidates. Ensure to bookmark the site for reference.

DISCLAIMER! These are not real NECO GCE Chemistry Questions, but likely repeated questions over the years to help candidates understand the nature of their examinations. Ensure to note every question provided on this page.

If you need us to help you with updated questions and answers at the right time about NECO GCE Chemistry Questions, kindly provide us with your phone number and email address in the comment box below.

Also, feel free to ask any questions pertaining to this guide.

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