BATCH 1. 7:00AM (14th March) 2021 JAMB CBT CHEMISTRY QUESTIONS AND ANSWERS



+234 8108515604[email protected]
+234 703070473508138274394

Notice
Our 2021 NECO Expo Subscription for answers supply ends by Sunday Night. Note: we don't accept calls.

BATCH 1. 7:00AM (14th March) 2021 JAMB CBT CHEMISTRY QUESTIONS AND ANSWERS


*1 :- the element with an electron configuration 1s2 2s2 2p6 3s23p64s2*

ANSWER = a noble gas

*2 :- ethanoic acid is monobasic because its*

CORRECT ANSWER = has one replaceable hydrogen molecule

*3 :- the type of bond in nitrogen molecule is*

CORRECT ANSWER = covalent

*4 :- in the hydrogenation of benzene, the catalyst used is*

CORRECT ANSWER = Ni

*5 :- the acid found in sour milk is*

CORRECT ANSWER = lactic acid

*6 :- transition metals with higher oxidation state will form oxides that

are*

CORRECT ANSWER = basic

*7 :- the iupac nomenclature of the compound above is*

CORRECT ANSWER = pent-2-yne

*8 :- in the diagram above X is*

CORRECT ANSWER = H2

*9 :- if 200cm3 of oxygen passes through a porous plug in 100sec.find

the time taken for the same volume of hydrogen to pass through the

same porous plug*

CORRECT ANSWER = 25s

*10 :- the method used in purifying sugar is*

CORRECT ANSWER = crystallization

*11 :- the activation energy of a chemical reaction can be lowered by*

CORRECT ANSWER = the addition of a catalyst

*12 :- in the equation above X is*

CORRECT ANSWER = CH3COOCH2CH3

*13 :- a solubility curve is a plot of the solubility of solute against*

CORRECT ANSWER = TEMPERATURE

*14 :- the method that is not economical for the removal of hardness in

water for town supply is*

CORRECT ANSWER = permute

*15 :- in the electrolytic extraction of sodium from fused sodium chloride

calcium chloride is usually added to*

CORRECT ANSWER = remove impurities

*16 :- grades of petrol having octane number nearer zero will cause a

motor car engine to ‘*

CORRECT ANSWER =

*17 :- nickel is plated on steel to*

CORRECT ANSWER = increase its strength

*18 :- the solubility in mol/dm3 of 20.2g of potassium

trioxonitrate(V)dissolved in 100g of water at room temperature is*

CORRECT ANSWER = 2

*19 :- what is the atomic number of an element having 127 neutrons and

82 electrons*

 *CORRECT ANSWER = 82

*20 :- 28.80CM3 OF NITROGEN AT 15c is cooled to 0C.its volue ar

constant pressure is*

*CORRECT ANSWER = 27.3

*21 :- what physical property of alkane decreases as the number of

carbon atoms increases*

*CORRECT ANSWER = solubility

*22 :- which of the following substances are made by polymerization*

*CORRECT ANSWER = nylon and artificial rubber

*23 :- which of the following compounds is unsaturated*

*CORRECT ANSWER = methylbenzene

*24 :- a compound contains 31.9% potassium 28.93 chlorine and the

remaining oxygen. What is the chemical formula of the compound?*

*CORRECT ANSWER = KClO2

*25 :- the use of neon light in aerodrome beacons is due to its*

*CORRECT ANSWER = COLOUR

*26 :- K4Fe(CN)6 is an example of a

*CORRECT ANSWER = complex

*27 :- if T change in s is small relative to change in H at room

temperature the value of change in G will be*

*CORRECT ANSWER = positive

*28 :- the solubility of alkanols in water is due to the presence of*

*CORRECT ANSWER = hydroxyl group

29 :- when lubricating oil is redistilled, it yields*

*CORRECT ANSWER = petroleum jelly

*30 :- the iupac nomenclature of K2Cr2O7 SI*

*CORRECT ANSWER = potassium heptaoxochromate(VI)

*31 :- alkynes burn with smoky luminous flame due to high

*CORRECT ANSWER = carbon content

*32 :- ozone is known for its ability to*

*CORRECT ANSWER = attack the respiratory tract of organisms

*33 :- which of the following properties is peculiar to graphite?*

*CORRECT ANSWER = it is unreactive

*34 :- calculate the amount in moles of zinc that will be deposited by

passing 10 faradays of electricity through a solution of zinc salt*

*CORRECT ANSWER = 5

*35 :- the air pollutant that dissolves in water due to produce acid rain is*

*CORRECT ANSWER = O3

*36 :- the property pecuiliar to pure oxygen is that it*

*CORRECT ANSWER = is lighter than air

*37 :- the principal property that determines the method of an extraction

of a metal from its ore is its*

*CORRECT ANSWER = position in the activity series

*38 :- when water is added to calcium oxide, it forms*

*CORRECT ANSWER = calcium hydroxide

*39 :- in the reaction above, the reverse reaction can be favored by*

*CORRECT ANSWER = decreases the temperature

*40 :- an element with electron configuration 1s2 2s2 2p6 3s2 3p4

belongs to the*

*CORRECT ANSWER = p-block



Tags:

FAQ

Site: Related Posts

2021 Neco Specimen | 2021 Neco 2021 NECO SPECIMEN | 2021 NECO SPECIMENS PRACTICAL ON PHYSICS


2021 NECO SCIENCE SPECIMENS

Get all your questions answered about the 0ne-time-only NECO exams for free and get a schedule of events. We will also help you with mock runs, tips on how best to prepare for the exam and even what to wear during the whole process


BEST NECO EXPO 2021 QUESTIONS AND ANSWERS | Neco Expo

Are you attempting the 2021 National Examinations Council (NECO) Senior Secondary School Examination (SSCE)? If yes, you can download or copy the timetable for the exam from this page.


2021 NECO OFFICIAL TIMETABLE

2021 NECO Science Specimens: 2021 Complete NECO Specimens. 2021 NECO Specimen | 2021 SPECIMEN for NECO


2021 NECO Specimen | 2021 SPECIMEN for NECO

Best Waec Expo runz site 2021, ARE YOU LOOKING FOR A PERFECT SOURCE FOR YOUR EXAM SUCCESS IN waec?, we provides real waec questions and answers.


2021 WAEC: BEST WAEC EXPO 2021 QUESTIONS AND ANSWERS

2021 Waec Science Specimens: 2021 Complete WAEC Specimens. 2021 Waec Specimen | 2021 SPECIMEN for WAEC


2021 Waec Specimen | 2021 SPECIMEN for WAEC

2021 NABTEB: NABTEB TIMETABLE FOR 2021/2021 ACADEMIC YEAR PDF DOWNLOAD. 2021 NABTEB TIMETABLE: 2021/2022 NABTEB TIMETABLE Free Download


2021 NABTEB: NABTEB TIMETABLE FOR 2021/2021 ACADEMIC YEAR PDF DOWNLOAD

This is 2021 WAEC Practical Specimens. Are you looking for WAEC specimen 2021? this page is all about 2021 WAEC Practical Specimens: 2021 WAEC Specimen - 2021 WAEC Science Specimens .


2021 WAEC Specimen | 2021 WAEC Science Specimens - WAEC Practical Specimens
EMMANUEL PEACE GAD said: Reg. num 75763144JF check for me... view all reviews