A) DEFINE:
1) Spurious alcohol
2) power alcohol
3) isomers
4) olefins
5) hydrocarbons
6) saturated hydrocarbon
7) decarboxylation
8) catenation
B) REASON BEHIND:
1) why do organic compounds have usually low melting and boiling point?
2) Methane is used as a gaseous fuel ?
3) Why does acetylene burns with a sooty flame.
4) why is it is dangerous to burn Methane in an insufficient supply of oxygen ? Write the chemical equation for the reaction.
5) why are aldehydes called carbonyl compounds ?
6) why is ethanoic acid called glacial Acetic Acid ?
7) Why organic chemistry regarded as a separated branch of chemistry ?
C) WRITE THE STRUCTURAL FORMULA OF:
1) propene
2) n-butane
3) Propionaldehyde
4) ethanoic acid
5) Ethyne forms an additional product with chlorine. Name this additional product and write its structural formula.
6) Marsh gas
7) a saturated Hydrocarbon
8) an unsaturated hydrocarbon with double bond.
9) propane
10) butane
11) ethane
12) structural formula of the compound with the atoms in each of the following cases:
a) an alkane with a carbon to carbon single bond.
b) an alcohol containing two carbon atoms.
c) an unsaturated hydrocarbons with a carbon to carbon triple bond.
13) two isomers of butane. give the correct IUPAC name of each isomer.
D) DIFFERENCE BETWEEN:
1) physical and chemical properties of isomers.
2) Organic & Inorganic compounds.
3) Saturated & unsaturated hydrocarbon.
4)
E) WRITE THE MOLECULAR FORMULA OF:
1) Third member of the homologous series of carbon compounds with general formula Cₙ H₂ₙ₊₁ OH
2) third and the fifth members of homologous series of carbon compounds represented by CₙH₂ₙ₋₂.
3) propane
4) butane
5) ethane
6)
F) ANSWER THE FOLLOWING:
1) A test tube contains a brown coloured liquid in it. The colour of the liquid remains unchanged when Methane is passed through it, but it disappears when ethene is passed. Suggest the name of the substance giving brown colour to the liquid.
2) A compound has a molecular formula C₂H₆O. It is usable as a fuel. Identify the compound.
3) Which of the following compounds contains Carboxylic group ? CH₃OH, CH₃COOH, CH₃CHO, CH₃COCH₃
4) Which of the following compounds can have a double bond C₃H₄ , C₃H₆ , C₃H₈.
5) The alkenes having how many carbon atoms are in solid state at normal temperature ?
6) The alkenes having how many carbon atoms are in liquid state at normal temperature ?
7) By which type of flame does Ethene gas burn in Air ?
8) By which type of flame does acetylene gas burns in the air ?
9) What word is used to describe three compound taken together ?
10) What is the special feature of the structure of ethyne ?
11) Match the description below with appropriate term from the list a to j;
a) Acid oxide b) Alkali c) amphoteric oxide d) basic oxide
e)deliquescence f) efflorescence g) electrolysis h) electrolyte I) homologous series j) hydrocarbons
A set of compounds having the same general formula, similar methods of preparation and similar chemical properties.
12) On heating soda lime with Sodium Acetate, a colourless gas 'G' is produced. This gas is lighter than air.
A) name the gas G
B) the gas burns into a blue flame in excess of oxygen, Write the chemical equation for it.
13) A) How is ethene prepared ?
B) How is it collected ?
14) Give the common name of the class of compounds having the general formula CₙH₂ₙ₋₂.write the name of the first member of this Homologous series.
15) which of the following compounds will give addition reactions ? C₂H₆ , C₃H₈ , C₂H₄ , CH₄ , C₄H₁₀, C₅H₈.
give reason for your answer.
16) An organic compound X which is sometimes used as antifreeze has the molecular formula C₂H₆O. on addition it gives a compound Y which gives effervescence with baking soda solution. What can X and Y be?
17) a) What are aldehydes ?
b) How is formaldehyde different from other members of aldehyde family ?
18) a) Write the general formula of carboxylic acids.
b) give the common and IUPAC names of CH₃COOH.
19) ethane and chlorine react together form monochloroethane (ethyl chloride).
a) write down the structural formula of Ethane.
b) what type of reaction has taken place between Ethane and chlorine ?
20) copy and complete the following sentence.
A saturated hydrocarbon will undergo ____ reaction where as the typical reaction of an unsaturated hydrocarbon is___.
21) a) Which compound should be heated with soda lime to obtain ethane gas in the laboratory?
b) write the equation for the reaction in (a) above.
22) Write the general formula for the following:
a) Alkanes
b) Alkenes
c) Alkanes
23) Which of the following are alkanes, alkenes, Alkanes.
C₂H₂ , C₂H₆ , C₂H₄ , C₃H₈.
24) A hydrocarbon A is obtained by the cracking of kerosene.
a) identify the Hydrocarbon
b) what happens when it reacts with bromine water ?
c) write the chemical equation for the reaction.
25) An organic compound is A ia a constituent of wine the beer. This compound on heating with potassium dichromate or oxygen forms another organic compound B.
a) Identify the compound A.
b) write the chemical equation for the reaction that takes place to form the compound B
c) name the compound B
26) The type of reaction between ethene and chlorine is the different from that between ethane and chlorine.
a) What is the type of reaction between ethene and chlorine.
b) What feature of the ethene structure makes such a reaction possible ?
c) name the product of the reaction between ethene and chlorine.
27) a)What is the special feature of the structure of: C₂H₂, C₂H₄
b) what type of reaction is common to both of these compounds ?
28) a) write the equation for the preparation of carbon tetrachloride from methane.
b) draw the structural formula of Ethyne.
c) how is structure of alkynes different from that of alkenes?
29)
G) WRITE THE CHEMICAL EQUATION:
1) During the burning of Ethanol in air.
2) Vapours of of methanol and carbon monoxide gas are passed over catalytic iodin-rhodium.
3) laboratory preparation of ethyne (acetylene) from calcium carbide.
4) Ethene and hydrogen.
5) Complete combustion of ethane.
6) formaldehyde and oxygen
7) Addition of ethene with halogen (for example, Br₂)
8) addition of ethene with hydrogen.
9) Ethanoic acid reacts with zinc.
10) reduction of formaldehyde.
11) laboratory preparation of Ethane from sodium propionate.
12) laboratory preparation of Ethane from calcium carbide.
13) Ethane and oxygen in the presence of molybdenum oxide.
14) preparation of methane from anhydrous sodium ethanoate (sodium Acetate).
15) Heating ethanol at 443K(170°C) in the presence of concentrated sulphuric acid.
16) Ethene from ethanol
17) Ethanoic acid from ethane
18) ethene from iodoethane
19) methanol from iodomethane
G) OBSERVATION QUESTIONS:
1) when a mixture of Sodium Acetate and so the lime is heated ?
2) when methane gas is burnt in air ?
3) when Ethene reacts with HCl ?
4) when ethanol reacts with oxygen ?
5) when acetic acid and ethanol react in the presence of concentrated sulphuric acid ?
6) when ethyne is bubbled through a solution of bromine in carbon tetrachloride ?
7) When Ethene is bubbled through a solution of bromine in tetrachloromethane (carbon tetrachloride)
8) When ethanol reacts with bromine ?
9)
H) FILL IN THE BLANKS BY CHOOSING THE CORRECT WORD/WORDS GIVEN WITHIN THE BRACKETS:
1) Compounds having the same molecular formula but having different structural formula are called___(homologous/ isomers)
2) Organic compounds are ____ compounds. (Ionic/covalent)
3) The organic compound containing carbon and___atoms only are called hydrocarbons, (oxygen/hydrogen)
4) Organic compounds are generally insoluble in____(organic solvents/water)
5) C= C bond is___then C - C bond is (longer/shorter)
6) An alkyl group is formed by removing a____atom from the parent alkane.(carbon/hydrogen)
7) Ethanol containing some methanol added to it is called ___ alcohol. (Ethylated/methylated)
8) The next higher homologue of methanal is __(Proponal/ethanal)
9) The conversion of Ethanol to ethene is an example of____ (dehydration/dehydrogenation)
10) Converting ethanol to Ethene requires the use of ____ (concentrated hydrochloric acid/ concentrated nitric acid/ concentrated Sulphuric acid)
11) The conversion of ethene to Ethane is an example of _____ (hydration/hydrogenation)
12) The catalyst used in the conversion of ethene to Ethane is commonly ____ (iron/Cobalt/nickel)
I) NAME THE FOLLOWING:
1) Two alcoholic beverages obtained only by fermentation.
2) The first four members of the homologous series of alkanes.
3) The first four members of homologous series of alkynes.
4) The first four members of homologous series of alkenes.
5) The products obtained when ethanol.
a) reacts with excess of concentrated sulphuric acid.
b) burns completely in air.
6) The hydrocarbon used for artificial ripening of fruits.
7) A compound used in making denatured alcohol.
8) The IUPAC names of ethyl alcohol and acetic acid.
9) The functional groups present in the following compounds:
a) CH₃COOH
b) CH₃CH₂OH.
10) Compounds having the same molecular formula but different chemical and physical properties
11) The isomers of butane.
12) The isomers of pentane.
13) The gas obtained by pouring cold water on calcium carbide.
14) The name and chemical formula of the simplest alkynes.
15) The chemical name of the gas which evolves in the marshy lands in the form of bubbles.
16) The name and chemical formula of the simplest organic acid.
17) The property of self-linking of carbon atoms through covalent bonds.
18) Minimum number of carbon atoms for two isomers of a hydrocarbon.
19) The prefix used for those organic compounds in which at least one carbon atom is attached to three other carbon atoms.
20) The physical state of an alkane having 8 carbon atoms per molecule.
21) The thermal decomposition of alkanes in the absence of air at a high temperature.
22) products formed when methanal reacts with concentrated sodium hydroxide solution.
23) aqueous solution of formaldehyde.
24) The addition product formed between ethene and water.
25) A compound formed by dehydration of ethanol by concentric sulphuric acid.
26) A compound which has vapour density 14 and turns alkaline potassium dichromate green.
27) A compound which decolourises bromine solution in carbon tetrachloride.
28) A compound which will give red precipitate with ammoniacal cuprous chloride solution.
29) A compound which forms chloroform on halogenation in the presence of Sunlight.
30) A compound which forms methanoic acid on oxidation in the presence at copper at 200°C.
31) A reagent which can be used to distinguish between Ethane and ethene.
32) A liquid which is a non- electrolyte.
33) A solid which can be used instead of concentrated sulphuric acid to prepare ethylene by the dehydration of Ethanol.
34) From the given list, name Ethane, ethene, ethanoic acid, ethyne, ethanol.
a) The compound with ---OH as the part of its structure.
b) The compound with ---COOH as the part of its structure.
c) homologue of homologous series with general formula CₙH₂ₙ
35) by which name 40% aqua solution of Methanal is known.
I) TRUE/FALSE:
1) The IUPAC names of various classes of organic compounds are derived from alkenes.
2) C - C bond is longer than C=C Bond.
3) acetylene is tetrahedral molecule.
4) Usomerism is the phenomenon when different compounds have the same molecular formula.
5) Organic compounds contain ionic linkage.
6) Ethanoic acid cannot be used as a laboratory reagent.
7) Methanal causes an irritation in Eyes.
J) WRITE TRUE or FALSE for the following sentences. Also correct the false statements:::::
1) Addition reactions are characteristic of Ethane, while substituation reaction for ethene.
2) ethylene is more reactive than acetylene, while ethylene is less reactive than ethane.
3) Ethyne is comparatively less reactive than Ethene.
4) Spurious alcohol is unfit for human consumption.
5) A carbon atom is able to form two single bonds by sharing electrons with neighbouring atoms.
6) Formaldehyde is different from other members of aldehyde family.
7) Acetic Acid turns red litmus blue.
K) CHOOSE THE CORRECT ANSWER::::
1) which one of the following is the formula of an organic compound ?
a) NaCl B) CH₄ C) NH₃ D) SO₂
2) Which one of these gases burns in oxygen to form carbon dioxide and water vapour and also decolourises bromine water
A) CH₄ B) C₂H₆ C) C₂H₄ D) CO
3) Which one of the following is the structural formula of an alkane ?
A) H₃C -- CH₂-- CH₂ -- CH₃
B) H₃C --- CH₂ --- OH
C) O
||
CH₃ --C --- OH
D) H₂C = CH₂
4) which of the following is a colourless and odourless gas ?
A) ethane B) ethyne
C) Methane D) methanol
5) Which of the following is known as wood alcohol ?
A) C₂H₄ B) C₂H₂
C) CH₃OH D) C₂H₅OH
L) Write Uses:
1) Ethene (2)
2) alcohol (2)
3) Methanal
4) acetylene
M) How will you bring about the following conversations starting from Ethane ?
1) ethane to chloroethane.
2) ethane to ethanol
3) ethane to acetaldehyde
4) ethane to acetic acid.
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