Study and practice Chemistry past questions with answers and detailed explanations. Then test your knowledge using our interactive CBT practice platform and prepare confidently for your upcoming examinations.
The appropriate test paper to use in the above experiment is moist
Alitmus psper
Bpotassium heptaoxodichromate (IV) paper
Clead (ll) trioxonitrate (V) paper
Duniversal indicator paper
View Explanation & Discuss
Question 2
jamb1991
The data in the table above shows the rate of reaction of nitrogen (ll) oxide with chlorine at 25oC It can be concluded that doubling the initial concentration of NO increase the rate of reaction by a factor of
Atwo
Bthree
Cfour
Dfive
View Explanation & Discuss
Question 3
jamb1991
50 cm3 of sulphur (lV) oxide, 800 cm3 of carbon (IV) oxide will respectively saturate 1.0cm3 of water at 15oC. Which of the following is suitable for demonstrating the fountain experiment?
ASulphur (IV) oxide and hydrogen chloride.
BCarbon (IV) oxide and ammonia
CAmmonia and hydrogen chloride
DCarbon (IV) oxide and Sulphur (IV) oxide
View Explanation & Discuss
Question 4
jamb1991
The electrons of two atoms Y and Z are arranged in shells as shown above. The bond formed between the atoms of Y and Z is
Aionic
Bcovalent
Cdative
Dmetallic
View Explanation & Discuss
Question 5
jamb1991
Which of these is an acid salt?
AK2SO4-.AI2(SO4)3.24H2O
BCuCO3.Cu(OH)2
CNaHS
DCaOCI2-
View Explanation & Discuss
Question 6
jamb1991
Which of the following are the products of the reaction between CH3COOH and CI2 in sunlight?
ACICH2COOH + HCI
BCH3COCI + HOCI
CCH3COOCI + HCI
DCH3COCI + HO2
View Explanation & Discuss
Question 7
jamb1991
Which of the following statements is TRUE of the complete hydrolysis of a glycerine by sodium hygroxide?
A3 moles ofNaOH are required for each mole of glyceride
B3 moles of glycerol are produced
COnly one mole of soap is formed
Dconcentrated H2SO4 is essential for the completion of the reaction
View Explanation & Discuss
Question 8
jamb1991
Is known as?
A1-chloro-2-methylbutane
B1-chloro-2-methylpropane
C2-chloromethylpropane
D1-chloro-2, 2-dimethylethane
View Explanation & Discuss
Question 9
jamb1991
A certain liquid has a high boiling point. It is viscous, non-toxic, miscible with water being very hygroscopic. This liquid is most likely to be?
ACH3CH2CH2HO
BCH3CHOHCH3
CCH3CH2CHOHCH3
DCH2OHCHOHCH2OH
View Explanation & Discuss
Question 10
jamb1991
One advantages of detergents over soap is that detergents?
Aare easier to maufacture
Bfoam more than soap
Cform soluble salts with hard water
Dare able to deter germs more than soap
View Explanation & Discuss
Question 11
jamb1991
Ethene when passed into concentrated H2SO4 is rapidly absorbed. The product is diluted with water and then warmed to produce?
Aethanol
Bdiethyl ether
Cethanal
Ddiethyl sulphate
View Explanation & Discuss
Question 12
jamb1991
How many grams of bromine will be required to completely react with 10 g of propyne?
(C = 12, H = 1, Br = 80)
A20 g
B40 g
C60 g
D80 g
View Explanation & Discuss
Question 13
jamb1991
Which of the following compounds can exist as geometric isomers?
A2-methylbut-2ene
BBut-2-ene
CBut-1-ene
DCI-C-Br
View Explanation & Discuss
Question 14
jamb1991
Copper (II) tetraoxosulphate (IV) is widely used as a?
Afertilizer
Bfungicide
Cdisinfectant
Dpurifier
View Explanation & Discuss
Question 15
jamb1991
Which of the following metals can be prepared in samples by the thermal decomposition of their trioxonitrate (V) salts?
ACopper and mercury
BSilver and copper
CMercury and silver
DMagnesium and mercury
View Explanation & Discuss
Question 16
jamb1991
Which of the following, in clear solution, forms a white precipitate when carbon (IV) oxide is bubbled into it for a short time?
AKOH
BNaOH
CCa(OH)2
DAI(OH)3
View Explanation & Discuss
Question 17
jamb1991
Addition of aqueous ammonia to a solution of Zn++ gives a white precipitate which dissolves in an excess of ammonia because?
Azinc is amphoteric
Bzinc hydroxide is readily soluble
Czinc forms a complex which is readily soluble in excess ammonia
Dammonia solution is a strong base
View Explanation & Discuss
Question 18
jamb1991
Oxygen gas can be prepared by heating?
Aammonium trioxonitrate (V)
Bammonium trioxonitrate (III)
Cpotassium trioxonitrate (V)
Dmanganese (IV) oxide
View Explanation & Discuss
Question 19
jamb1991
Which of the following salts can be melted without decomposition?
ANa2CO3
BCaCO3
CMgCO3
DZnCO3
View Explanation & Discuss
Question 20
jamb1991
Which of the following gases will rekindle a brightly glowing splint?
