(a) Distinguish between esterification and saponification reactions of organic compounds
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1
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2232
|
March 30, 2019
|
(a) What is vinegar? (b) Describe with a chemical equation what happens when sodium hydrogen carbonate reacts with ethanoic acid
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1
|
2084
|
March 30, 2019
|
Give reasons for the following observations: 1. The element carbon forms a very large number of compounds
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1
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2748
|
March 30, 2019
|
1. Why are covalent compounds generally poor conductors of electricity?
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1
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3381
|
March 30, 2019
|
Give reasons for the followings: (i) Oxidation of ethanol with CrO3 produces ethanal while ethanol when oxidised with alkaline KMnO4, produces ethanoic acid
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1
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3625
|
March 30, 2019
|
What is meant by ‘dehydrating agent?
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1
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1547
|
March 30, 2019
|
Give reasons for the following : (i) A peculiar smell is observed near the preserved specimens in biology laboratory
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1
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1207
|
March 30, 2019
|
(i) Ethene reacts with bromine water. (ii) Ethanol burns in air
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1
|
981
|
March 30, 2019
|
1. Write a chemical equation to show how ethanol can be converted into ethanoic acid
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1
|
722
|
March 30, 2019
|
What are detergents? What change has been made in detergents to make them easily bio-degradable?
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1
|
789
|
March 30, 2019
|
1. Write the chemical equation representing the preparation reaction of ethanol from ethene
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1
|
2893
|
March 30, 2019
|
Write the formulae for the given compounds and names of the functional groups present in each of them:
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1
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583
|
March 30, 2019
|
A compound X is formed by the reaction of a carboxylic acid C2H4Oa and an alcohol in presence of a few drops of H2SO4
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1
|
690
|
March 30, 2019
|
Explain esterification reaction with the help of a chemical equation. Describe an activity to show esterification
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1
|
905
|
March 30, 2019
|
Write three different chemical reactions showing the conversion of ethanoic acid to sodium ethanoate
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1
|
985
|
March 30, 2019
|
A carbon compound ‘P’ on heating with excess cone. H2SO4 forms another carbon compound
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1
|
1377
|
March 30, 2019
|
What are hydrocarbons? Distinguish alkanes from alkenes and each of them from alkynes giving one example of each
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1
|
5482
|
March 30, 2019
|
Write chemical equations to describe two examples of different oxidations of ethanol. List two uses of ethanol
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1
|
2770
|
March 30, 2019
|
1. List two reasons for carbon forming a large number of compounds
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1
|
5149
|
March 30, 2019
|
Define the term ‘structural isomerism’, Explain why propane cannot exhibit this property
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1
|
4414
|
March 30, 2019
|
Write chemical equations for what happens when: (i) Sodium metal is added to ethanoic acid
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1
|
1111
|
March 30, 2019
|
Write one chemical equation to represent each of the following types of reactions of organic substances:
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1
|
864
|
March 30, 2019
|
(a) What is a homologous series of compounds? List any two of its characteristics?
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1
|
4042
|
March 30, 2019
|
(i) Ethanol is heated with concentrated sulphuric acid at 443 K
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1
|
710
|
March 30, 2019
|
An organic compound A of molecular formula C2H6O on oxidation with acidified potassium dichromate gives an acidic compound B
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1
|
1450
|
March 30, 2019
|
Intake of small quality of methanol can be lethal. Comment
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1
|
620
|
March 30, 2019
|
You have three unlabelled test tubes containing ethanol, ethanoic acid and soap solution
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0
|
2894
|
March 18, 2018
|
Elements forming ionic compounds attain noble gas electronic configuration by either gaining or losing electrons from their valence shells
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0
|
1532
|
March 18, 2018
|
Give a chemical test to distinguish between saturated and unsaturated hydrocarbons
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0
|
5199
|
March 18, 2018
|
A salt X is formed and a gas is evolved when ethanoic acid reacts with sodium hydrogen- carbonate
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0
|
5530
|
March 18, 2018
|