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question_answer1)
Which of the following properties will not be same for two alkane molecules which are isomers?
I. Empirical formula |
II .General formula |
III. Molecular formula |
IV. Structural formula |
A)
I and II only done
clear
B)
I only done
clear
C)
III and IV only done
clear
D)
IV only done
clear
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question_answer2)
An organic compound X with molecular formula, \[{{C}_{2}}{{H}_{6}}O\]on oxidation with potassium dichromate and sulphuric acid gives an acidic compound Y. The compounds X and Y react on warming in presence of cone. \[{{H}_{2}}S{{O}_{4}}\]to give a sweet smelling compound Z. What are the compounds X, Y and Z?
A)
B)
C)
D)
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question_answer3)
Which of the following statements are false about soaps and detergents?
(i) Soaps are water soluble while detergents are not. |
(ii) Soaps are non-biodegradable while detergents are biodegradable. |
(iii) Hardness of water is due to presence of \[Ca\] and \[Mg\] salts which form scum with soap. |
(iv) The polar group in soaps is \[COONa\]. |
A)
(i), (ii) and (iii) only done
clear
B)
(i) and (ii) only done
clear
C)
(iii) and (iv) only done
clear
D)
(i), (ii) and (iv) only done
clear
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question_answer4)
Study the given flow chart carefully and identify W, X and Y.
A)
B)
C)
D)
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question_answer5)
A few chemical processes are listed as :
I. An alcohol undergoes oxidation to produce a carboxylic acid. |
II. An alcohol undergoes esterification. |
III. A carboxylic acid reacts with sodium carbonate. |
IV. Propane undergoes complete combustion. |
In which of the given processes, products have more carbon atoms than the underlined reactant?
A)
I and IV only done
clear
B)
I and II only done
clear
C)
I, III and IV done
clear
D)
Only done
clear
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question_answer6)
Mark the wrong statement among the following.
A)
People sleeping in closed room with coal fire burning inside, have died due to \[C{{O}_{\,2}}\] poisoning. done
clear
B)
Flame is only produced when gaseous substances burn. done
clear
C)
Fullerenes are allotropes of carbon. done
clear
D)
Intake of methyl alcohol can cause death. done
clear
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question_answer7)
In which of the following test tubes effervescence will be observed?
A)
P done
clear
B)
Q done
clear
C)
R done
clear
D)
S done
clear
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question_answer8)
Read the given statements and mark the correct option.
Statement 1: Homologous series is a series of compounds having similar chemical properties. |
Statement 2: The successive members of the homologous series differ by - \[C{{H}_{2}}\] group. |
A)
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done
clear
B)
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done
clear
C)
Statement 1 is true but statement 2 is false. done
clear
D)
Both statements 1 and 2 are false. done
clear
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question_answer9)
Match column I with column II and mark the correct option from the codes given below.
|
Column I |
Column II |
(a) |
\[{{C}_{2}}{{H}_{5}}OH\to C{{H}_{3}}COOH\] |
(i) \[Conc.\,{{H}_{2}}S{{O}_{4}},\]\[170{{\,}^{o}}C\] |
(b) |
\[{{C}_{2}}{{H}_{5}}OH\to \]\[C{{H}_{2}}=C{{H}_{2}}\] |
(ii) \[{{H}_{2}},\,Ni\] |
(c) |
(c) \[C{{H}_{4}}\to C{{H}_{3}}Cl\] |
(iii)\[Alk.\,KMn{{O}_{4}}\] |
(d) |
(d)\[C{{H}_{2}}=C{{H}_{2}}\to \]\[C{{H}_{3}}C{{H}_{3}}\] |
(iv) \[C{{l}_{2}},\]sunlight |
A)
(a) - (i), (b) - (iii), (c) - (ii), (d) - (iv) done
clear
B)
(a) - (iv), (b) - (iii), (c) - (ii), (d) - (i) done
clear
C)
(a) - (i), (b) - (iv), (c) - (iii), (d) - (ii) done
clear
D)
(a) - (iii), (b) - (i), (c) - (iv), (d) - (ii) done
clear
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question_answer10)
Methane, the first member of alkane homologous series has the boiling point equal to - \[161{}^\circ C.\] Which of the following represents the correct formula and boiling point of third member of the series?
A)
B)
C)
D)
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question_answer11)
Two compounds X and Y have the same molecular formula, \[{{C}_{3}}{{H}_{6}}O.\]Identify the functional groups and structural formulae of X and Y.
A)
\[-CHO\]and \[-CO,\,X=C{{H}_{3}}C{{H}_{2}}CHO.\]\[Y=C{{H}_{3}}COC{{H}_{3}}\] done
clear
B)
\[-CHO\]and \[-CO,X=C{{H}_{3}}OC{{H}_{2}}C{{H}_{3}},\]\[Y=C{{H}_{3}}COC{{H}_{3}}\] done
clear
C)
\[-CO\]and \[-COOH,X=C{{H}_{3}}COC{{H}_{3}},\]\[Y=C{{H}_{3}}COOH\] done
clear
D)
\[-CHO\]and \[-COOH,X=C{{H}_{3}}C{{H}_{2}}OC{{H}_{3}},\]\[Y=C{{H}_{3}}C{{H}_{2}}COOH\] done
clear
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question_answer12)
Saanvi wrote IUPAC names of few compounds asked by her science teacher The teacher told her that one of the compounds was not correctly named. Identify the one with wrong name.
A)
\[C{{H}_{3}}C{{H}_{2}}\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}:\]butanone done
clear
B)
\[C{{H}_{3}}C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-H:\]Propanal done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-OH:\]Ethanoic acid done
clear
D)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-OH:\]Butanol done
clear
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question_answer13)
Shobhit, a class 10 student prepared an ester by heating a mixture of 6 g of ethanoic acid and 1.6 g of methanol with cone. sulphuric acid. The number of moles of ethanoic acid and methanol used and the ester produced are respectively
A)
1, 5, ethyl methanoate done
clear
B)
0.1, 0.05, methyl ethanoate done
clear
C)
0.1, 0.05, ethyl ethanoate done
clear
D)
1, 5, methyl methanoate. done
clear
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question_answer14)
A hydrocarbon which can add two molecules of \[B{{r}_{2}}\]is
A)
\[{{H}_{2}}C=CH-CH=C{{H}_{2}}\] done
clear
B)
\[HC=CH\] done
clear
C)
\[{{H}_{3}}C-CH=CH-C{{H}_{3}}\] done
clear
D)
Both (A) and (B). done
clear
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question_answer15)
Few organic reactions are given below. Which of the reactions is not named correctly?
A)
\[C{{H}_{3}}COOH+{{C}_{2}}{{H}_{3}}OH\xrightarrow{{{H}^{+}}}\]\[\underset{(Esterification)}{\mathop{C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}+{{H}_{2}}O}}\,\] done
clear
B)
\[C{{H}_{3}}COONa+NaOH\to \underset{(Decarboxylation)}{\mathop{C{{H}_{4}}+N{{a}_{2}}C{{O}_{3}}}}\,\] done
clear
C)
\[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\xrightarrow{NaOH}\underset{(Saponifiation)}{\mathop{C{{H}_{3}}COONa+{{C}_{2}}{{H}_{5}}OH}}\,\] done
clear
D)
\[C{{H}_{3}}C{{H}_{2}}OH\xrightarrow{acidified\,{{K}_{2}}C{{r}_{2}}O}\underset{(Combustion)}{\mathop{C{{H}_{3}}COOH}}\,\] done
clear
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question_answer16)
IUPAC names of a few esters are given below :
1. Ethyl propanoate
|
2. PropyI methanoate
|
3. Methyl butanoate
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4. Ethyl butanoate
|
The ester(s) which contain(s) ten hydrogen atoms per molecule is/are
A)
1 only done
clear
B)
4 only done
clear
C)
1 and 3 only done
clear
D)
1 and 2 only. done
clear
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question_answer17)
Rohan was given three unknown organic compounds P, Q and R. To identify the compounds, he tested the compounds with different reagents and noted down his observations in the given table.
S. No.
|
Reagents
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Compound P
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Compound Q
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Compound R
|
1.
|
\[NaHC{{O}_{3}}\]solution
|
Brisk effervescence
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No reaction
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No reaction
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2.
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Red litmus solution
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No reaction
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Red litmus turned blue
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No reaction
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3.
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Sodium metal test
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Gas produced which burns with a pop sound
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No reaction
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Gas produced which burns with a pop sound
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Compounds P, Q and R are respectively
A)
Methane, methanol and methyl methanoate done
clear
B)
Ethanoic acid, soap solution and ethanol done
clear
C)
Ethanoic acid, ethyl ethanoate and ethanol done
clear
D)
Methane, methanal and methanoic acid. done
clear
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question_answer18)
Three hydrocarbons P, Q and R have carbon which combine with hydrogen in the ratio of 3 : 2 : 1 respectively. Which of the following is incorrect about the reactions shown by P, Q and R?
A)
P does not undergo addition reactions. done
clear
B)
Both Q and R decolourise bromine water. done
clear
C)
Both Q and R give white precipitate with \[AgN{{O}_{3}}\] solution dissolved in \[N{{H}_{4}}OH.\] done
clear
D)
None of these. done
clear
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question_answer19)
Which of the following represents the correct increasing order of volume of oxygen required for complete combustion per mole under the same conditions?
A)
Propyne < Ethyne < Ethane < Ethene done
clear
B)
Ethyne < Ethene< Ethane < Propyne done
clear
C)
Propyne > Ethane > Ethyne > Ethene done
clear
D)
Propyne > Ethane > Ethene > Ethyne done
clear
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question_answer20)
Read the given passage and fill in the blanks by choosing an appropriate option.
|
The molar ratio of \[C{{O}_{2}}\]and\[{{H}_{2}}O\] produced by the combustion of one mole of hydrocarbon ___i___ is 5: 4. The succeeding homologoue of i is ___ii___ while preceding homologoue is ___iii___.
|
A)
B)
C)
D)
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