NECO 2020 CHEMISTRY PRACTICAL ANSWERS – EXPO RUNS

JAMB 2019 Mock Exam: Things To Take Note Of During The Exam
Waec Gce Geography Answers – Jan/Feb 2019 Expo

 

NECO 2020 CHEMISTRY PRACTICAL ANSWERS – EXPO RUNS

 

EACH SUBJECT ANSWERS WILL BE READY BEFORE THE EXAM COMMENCE.
SO SUBSCRIBE IF YOU WANT TO PARTICIPATE.

AND NOTE THAT WHATSAPP/SMS SUBSCRIBERS GET QUESTION AND ANSWERS BEFORE OTHERS.

LIKE OUR FB PAGE: https://web.facebook.com/noniwap2

 

 

Paper I: Practical – Chemistry
10:00am – 12:00pm
======================================

COMPLETED!!
=====================================

(1)
CLICK HERE FOR THE IMAGE

CLICK HERE FOR THE IMAGE
=====================================

(2ai)
Tabulate:
TEST: C + 5cm³ of distilled water and shake thoroughly. Divide the solutions into three portions.

OBSERVATION: A pale green solution results

INFERENCE: Salt is soluble

(2aii)
TEST: To the first portion add NaOH solution in drys

OBSERVATION: Dark green gelatinous was formed

INFERENCE: Fe²+ present

(2aiii)
TEST: then in excess

OBSERVATION: Precipitate is insoluble

INFERENCE: Fe²+ present

(2aiv)
TEST: To the second portion add K3Fe(CN)6 solution

OBSERVATION: A dark blue precipitate formed

INFERENCE: Fe²+ confirmed

(2bi)
TEST: To the third portion add AgNO³ solution

OBSERVATION: White Precipitate formed

INFERENCE: SO4²- , CL- CO²- present

(2bii)
TEST: To the results obtained in add dilute HNO3 in drops , then excess

OBSERVATION: White Precipitate is insoluble

INFERENCE: CL- present

(2biii)
TEST: To the results obtained in add NH3 solution

OBSERVATION: White Precipitate dissolves

INFERENCE: CL- Confirmed
==============================================

(3)
CLICK HERE FOR THE IMAGE

=================================================
===================================================

[B]CHEMISTRY PRACTICAL QUESTIONS 👇

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLEASE AVOID GLO WHILE TEXTING US
Do Not USE GLO LINE TO SEND YOUR SUBSCRIPTION

(CHEMISTRY PRACTICAL – NECO 2020)
Whatsapp/SMS: N800 MTN CARD
Password/Link: N400 MTN CARD

 

 

Forward Subject Name, MTN CARD PINS, Phone number to: 09033919669 via TEXT MESSAGE(SMS) ONLY.

NOTE: Do Not Subscribe On Whatsapp. Send via SMS ONLY. After sending, relax, and wait for your password.

COMMENTS

WORDPRESS: 0