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WorksheetsCHEMISTRY SK 026 PAPER 1 15/16
Total questions: 30
Worksheet time: 8hrs 30mins
The following factors influence the speed of reaction EXCEPT
Particle size
Catalyst
Concentration of the products
Temperature
The enthalpy of solution of an ionic compound equal to
Ionisation energy + Enthalpy of hydration
Enthalpy of hydration - lattice energy
Lattice energy - Enthalpy of hydration
Lattice energy + enthalpy of hydration
What mass of ethanol, C2H5OH must be burnt completely in oxygen in order to produce 82 kJ of heat?
Given ΔHoc = -1083 kJ mol-1.
0.29 g
0.57 g
3.48 g
6.96 g
Which of the following is correct cell notation for the given cell at standard conditions?
2Au3+(aq) + 3Co(s) → 3Co2+(aq) + 2Au(s)
Au(s) l Au3+(aq,1.0M) ll Co2+(aq, 1.0 M) l Co(s)
Au3+(aq,1.0M) l Au(s) ll Co(s) l Co2+(aq, 1.0 M)
Co(s) l Co2+(aq, 1.0 M) ll Au3+(aq,1.0M) l Au(s)
Co2+(aq, 1.0 M) l Co(s) ll Au(s) l Au3+(aq,1.0M)
Organic compounds ae classified into saturated and unsaturated compounds. Choose the CORRECT statement regarding the unsaturated organic compound.
Open chain and cyclic hydrocarbon comprise only the σ bonds.
Open chain or cyclic hydrocarbon comprise only the σ bonds.
Open chain hydrocarbons comprise only the σ bonds.
Open chain and cyclic hydrocarbons comprise only the σ bonds and at least one π bond.
Which of the following neutral atoms has two covalent bonds and two lone pairs of electrons?
carbon
fluorine
oxygen
nitrogen
All the following alkanes are named correctly EXCEPT
3-ethyl-2,4-dimethylheptane
4-ethyl-2,3-dimethylnonane
5-ethyl-2-methylhexane
3-ethyl-2-methyloctane
Reaction of excess 2-methylbutane with bromine at 125oC gives FOUR monobromoalkane products. What is the major product for the reaction?
CH3CH(CH3)CH2CH2Br
BrCH2CH(CH3)CH2CH3
CH3CH(CH3)CHBrCH3
CH3CBr(CH3)CH2CH3
What is the obeyed rule for the formation of the products when unsymmetrical alkenes reacted with hydrogen bromide in the presence of peroxide?
Saytzeff's rule
Anti-Saytzeff's rule
Anti-Markovnikov's rule
Markovnikov's rule
Which of the following structural formula represent trans-2-methyl-3-hexene?
2-methylpropene is reacted with hot,acidified solution of KMnO4. What is the product formed?
(CH3)2CO + H2CO
(CH3)2CO + CO + H2O
(CH3)2CO + HCOOH
(CH3)2CO + CO2 + H2O
All the following statements about benzene are true EXCEPT
Benzene is an aromatic hydrocarbon
Benzene is an example of a planar organic molecule
Benzene has localised pi electrons in these carbon-carbon double bonds which are arranged alternately with three single carbon-carbon bonds.
The structure of benzene molecule can be represented by a resonance hybrid of two Kekule structures.
Which of the following species is attacked by benzene in the electrophilic nitration reaction?
NO2+
H2NO+
NO+
H2NO3-
Which of the following alkyl chlorides will undergo SN2 reaction?
Chloromethylcyclopentane
1-chloro-2-methylcyclopentane
1-chloro-3-methylcyclopentane
1-chloro-1-methylcyclopentane
The alcohols below undergo dehydration upon heating with concentrated sulphuric acid in which the reaction mechanism involved carbocation rearrangement EXCEPT
2-methyl-2-hexanol
2-methyl-3-pentanol
2-methyl-2-phenyl-1-propanol
3,3-dimethyl-2-pentanol
Compound E give positive results with iodoform test but does not react with Tollens' reagent. Compound E is
CH3CH2COCH2CH3
CH3CH2CH2COCH3
CH3CHO
CH3CH2CHO
Why ethanoic acid is more acidic than ethanol?
The presence of dimeric hydrogen bond in ethanoic acid
pKa value of ethanoic acid is lower
inductive effect contributed by carbonyl group in ethanoic acid.
The formation of resonance stabilised ethanoate ion.
What is the expected product for the reaction of butanoic acid with LiAlH4 followed by hydrolysis?
CH3CH2CH2COOCH2CH2CH2CH3
CH3CH2CH2CH2OH
CH3CH2CH2CHO
CH3CH2CH=CH2
Choose the suitable reagent F in the conversion above:
Br2, H2O
H2, Pd
Br2, NaOH
LiAlH4, followed by H3O+
What is the structure of lysine in a basic medium?
Peptide bonds in dipeptide molecules consist of
imide linkages
amide linkages
ester linkages
anhydride linkages
Ethene and polyethene have similar
empirical formula
molecular formula
melting point
relative molecular mass
The components of a bomb calorimeter include
water
ignition wire
strong steel container
The following statements are true about an electrolytic cell EXCEPT
The negative electrode is the anode
It makes non-spontaneous reaction possible
Electrical energy is converted into chemical energy
Figure above the Maxwell-Boltzmann distribution of molecular energies at 100 K. Which of the area(s) represent(s) the number of reacted molecules to form product?
I
II
III
Which of the following molecule(s) is/are chiral?
2-chlorobutane
1-chlorohexane
1,5-dichloropentane
COmbustion of alkane in excess oxygen produces
water
carbon dioxide
carbon monoxide
Choose reaction(s) that obey(s) Markovnikov's rule.
Identify reagent G for the following reaction.
SOCl2
Cl2/H2O
Cl2/hv
Which of the following would produce an acid?
Hydrolysis of a nitrile compound
Oxidation of a primary alcohol
Reaction of a Grignard reagent followed by hydrolysis
