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NECO GCE Chemistry Practical 2020 Latest Updates

Filed in Exam, NECO News by on June 24, 2020

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NECO GCE Chemistry Practical 2020 Latest Updates.

NECO GCE Chemistry Practical Questions 2020: Chemistry Practical NECO GCE Expo Questions is out now on our website. In this article, I will be showing you past NECO GCE Chemistry Practical random repeated questions for free.

You will also understand how these exams are set and many more examination details. All you need to do is to stay focus and follow this guide.

NECO GCE Agricultural Science Questions 2020

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. NECO was created by former Head of State Abdulsalami Abubakar in April 1999. It was the first Federal organization to offer subsidized registration to academic candidates in Nigeria.

NECO GCE Chemistry Practical Questions.

1ai)
Methyl Orange
Reason:- Titration of strong acid against base
1aii)Yellow
1aiii)Hydrochloricacid
1aiv)2HCL(aq)+ x2Co3 -> 2 x CLaq + H20(aq) + CO2(g)

1b)
Molar mass of HcL = 1+35.5
=36.5gmol^-1
Con of A is moldm^-3 =
Con of A of gdm^3/molar mass in gdm^3
=7.30gdm^-3/36.5gmol^-1
=0.200moldm^-3

1bii)
using CAVA/CBVB = a/b
CA = 0.200mol/dm^3
VA = 26.20cm^3
Cb = ?
VB = 25.0cm^3
a = 2mols
b = 1mol
0.200mol/dm^3 x 26.2cm^3/Cb x 25.0cm^3
= 2mols/1mol
Cb = 0.200×26.20×1/25.0×1
Cb = 5.24/25.0mol/dm^3
Cb = 0.2096mol/dm^3

1biii)
Conc. of B in gdm-3/Conc. of B in mol/dm-3
=10.6gdm-3/0.148 gdm-3
=101.15g
=101gmol-1

2ai)
INFERENCE:
Sample X is a soluble salt

2aii)
OBSERVATION:
A gas is evolved. The gas turns red moist litmus blue.
It forms white fumed when NaOH solution was added was added

INFERENCE:
Alkaline gas

2aiii)
INFERENCE:
CO3 gas is CO3^2-

2aiv)
INFERENCE:
The solution is alkaline

3a)
i)NH4CL and AgNo3
ii)ZnCo3
iii)Fes
iv)AgNo3
v)NH4Cl

3b)
– Burrette
– Reshort Hand
– Solution/Acid
– Conical Flask
– white tile

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

If you need us to help you with updated questions and answers at the right time about this Examination, kindly provide us your phone number and email address in the comment box below. Also feel free to ask any question pertaining to this guide. 

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