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.
Which of the following properties is not peculiar to matter?
AKinetic energy of particles increases from solid to gas
BRandom motion of particles increases from gas to solid
COrderliness of particles increases from gas to liquid
DRandom motion of particles increases from liquid to gas
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Question 43
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The pollutant that contributes to the depletion of the ozone layer is
ACFCs
BNO2
CSO2
DCO
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Question 44
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The compound produced when sodium peroxide is heated with excess sodium is
ANa2CO3
BNa2O
CNaNO2
DNaOH
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Question 45
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The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is
APhosphorus-32
BCobalt-60
CCarbon-14
DIodine-131
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Question 46
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What is the concentration of a solution containing 2g of NaOH in 100cm3 of solution?
[Na=23, O=16, H=1]
A0.05 moldm-3
B0.30 moldm-3
C0.50 moldm-3
D0.40 moldm-3
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Question 47
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The process that requires the use of hardwater in its operation is
ATanning
BBottling
CLaundry
DDyeing
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Question 48
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Which of the following statements is true about 2-methylpropane and butane
AThey have different number of carbon atoms
BThey are members of same homologous series
CThey have the same boiling points
DThey have different chemical properties
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Question 49
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The compounds CH3CH2CHO and CH3COCH3 can be distinguished from each other using
ADilute ammonia
BBenedict's solution
CTollen's reagent
DSodium hydroxide solution
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Question 50
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The colour of litmus in an alkaline medium is
ARed
BYellow
CPink
DBlue
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Question 51
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The relative atomic mass of a naturally occurring lithium consisting of 90%\(\frac{7}{3}\)Li and 10%\(\frac{6}{3}\)Li is
A6.2
B6.8
C7.1
D6.9
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Question 52
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The industrial preparation of hydrogen gas from water gas is referred to as
ABosch process
BContact process
CHaber process
DBayer Process
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Question 53
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The ability of carbon to form long chains is referred to as
AAlkylation
BAcylation
CCarbonation
DCatenation
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Question 54
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Ammonium chloride can be separated from its mixture with common salt by
ADistillation
BEvaporation
CDecantation
DSublimation
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Question 55
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The principle of column chromatography is based on th ability of the constituents to
AReact with the solvent in the column
BReact with each other in the solvent in the column
CDissolve in each other in the column
DMove at different speeds in the column
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Question 56
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The monomer of nylon is
AHydroxybenzene
BHexanedioic acid
CBenzene -1,-4-dicarboxylic acid
DEthane-1,2-diol
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Question 57
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In the laboratory preparation of chlorine from concentrated hydrochloric acid in the presence of potassuim tetraoxomanganate(VII) the produced is dried by passing it through
AConcentrated tetraoxosulphate (VI) acid
BAnhydrous calcium chloride
CCalcium oxide
DSodium hydroxide
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Question 58
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The enzyme used in the hydrolysis of starch to dextrin and maltose is
AZymase
BSucrase
CAmylase
DLactase
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Question 59
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The condition required for corrosion to take place is the presence of
AOxygen and Carbon (IV) oxide
BWater and Oxygen
CWater and Carbon (IV) oxide and Oxygen
DWater and Carbon (IV) oxide
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Question 60
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In an electrochemical cell, polarization is caused by
