Question 1 of 20 1,623 total questions
Which of the following pairs illustrates isotopy?
A But-l-ene and but -2-ene
B Ortho-hydrogen and parahydrogen
C Oxygen and ozone
D Hydrogen and deuterium
E Alpha-particle and beta-particle
Alkanes are used mainly
A in the production of plastics
B as domestic and industrial fuels
C in the textile industry
D in the hydrogenation of oils
E as fine chemicals
Trioxosulphate (lV) acid is not stored for a long period because it
A is a weak dibasic acid
B has bleaching properties
C is unstable and eaily decomposed
D smells strongly of sulphur (lV) oxide
E can act as a germicide
Which of the following solids has a network structure?
A Diamond
B lodine
C Sulphur
D Graphite
E lron
Starch undergoes complete hydrolysis to produce
A maltose
B lactose
C fructose
D glucose
E sucrose
Which of the following separation is routinely applied in the petroleum industry
A Filtration
B Chromatography
C Evaporation
D Fractional crystallization
E Fractional distillation
Copper metal will react with concentrated trioxonitrate (V) acid to give?
A Cu(NO3 )3 + NO + N2 O4 + H2 O
B Cu(NO3 )2 + NO + H2 O
C CuO + NO2 + H2 O
D Cu(NO3 )2 + 2NO2 + 2H2 O
Which of the following accounts for the difference in the mode of conduction of electricity by metals and aqueous salt solutions?
A Electrons are present in metals but not in salt solutions
B Metals are conductors while salts are electrolytes
C Electricity is carried by mobile elrctrons in metals but by ions is aqueous salt solution
D salts ionize in aqueous solutions while metals do not
E Metals are reducing agents while salts are not
A dye is suspected to have contaminated a lollipop. Which of the following is the best method by which the contaminant may be isolated?
A Fractional distillational
B Recrystallization
C Filtration
D Paper chromatography
E Evaporation
What is the value of n in the following equation? XO-4 +8H + + ne- → X2 + + 4H2 O
Which of the following groups contains entirely linear molecules?
A H 2 NH3 O 2
B CO2 NH 3 2
C H 2 CH4 N2
D CO2 H2 N2
E CH 4 O 2 CO 2
The product of the reaction between propanoic acid and ethanol is
A prophlmethanoate
B ethylethanoate
C methylpropanoate
D propylethanoate
E ethylpropanoate
Which of the following minerals contains flurine as one of its constituent elements?
A Cryolite
B Bauxite
C Potash alum
D Kaolin
E Mica
Which of the following pH values is likely to be that of a slightly alkaline solution?
Which of the following statements is not correct? The 4s orbital
A is defined by the quantum number 1 = O
B is of higher energy than the 3d orbital
C contains a maximum of two electrons
D is spherical about the nucleus
E is filled before the 4p orbital
Which of the following statement is not correct about esterification?
A It is a slow reaction
B the process is reversible
C it is similar to hydrolysis
D it is catalysed by acids
E the products usually have a fruity smell
If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information?
A the reaction vessel gets hotter as the reaction proceeds
B ∆H for the reaction is positive
C the rate of the reaction increases with time
D the activation energy of the reaction is high
E the rate of the reaction increases with time
If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information?
A the reaction vessel gets hotter as the reaction proceeds
B ∆H for the reaction is positive
C the rate of the reaction increases with time
D the activation energy of the reaction is high
E the rate of the reaction increases with time
Vulcanization of rubber
A stops the growth of fungus on the rubber
B increases the solubility of the rubber
C decreases the elasticity of the rubber
D hardnes the rubber through cross-linkage
E removes sulphur from the rubber
The energy required to remove the most loosely bound electron from an atom in the gaseous state is known as the
A bond energy
B ionization energy
C potential energy
D activation energy
E kinetic energy
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