Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A): Most of the carbon compounds are good conductors of electricity.
Reason (R): They do not dissociate to form ions and remain as molecules.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: D
Carbon compounds are mainly poor conductors of electricity.
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Q2:
MULTIPLE CHOICE QUESTION
Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A): Iso- butane is the isomer of C4H10.
Reason (R): Iso-butane has four C and ten-H atoms.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: B
is the structural isomer of butane.
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Q3:
MULTIPLE CHOICE QUESTION
Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion: Following are the structural isomers of butane.
Reason: Structural isomers have the same molecular formula but they differ in their structures.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: A
Isomers are defined as those compounds that possess the same molecular formula but different structural arrangement. Butane has the molecular formula C4H10. Therefore, the structural isomers of butane will be n-butane and iso-butane.
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Q4:
MULTIPLE CHOICE QUESTION
Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A): In a homologous series of alcohols, the formula for the second member is C2H5OH and the third member is C3H7OH.
Reason (R): The difference between the molecular masses of the two consecutive members of a homologous series is 144u.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: C
In a homologous series of alcohols, the formula for the second member is C2H5OH and the third member is C3H7OH. The difference between the molecular masses of the two consecutive members of a homologous series is 14 because a -CH2 group has a molecular mass of 14 amu. Hence, the correct answer is the assertion is true and Reason is false.
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Q5:
MULTIPLE CHOICE QUESTION
Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A): Third member of alkane is propane (C3H8)
Reason (R): It is obtained from general formula CnH2n + 2
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: A
C3H8 can be obtained from the general formula, CnH2n + 2.
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Q6:
MULTIPLE CHOICE QUESTION
Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A): Following are the members of a homologous series : CH3OH, CH3CH2OH, CH3CH2CH2OH
Reason (R): A series of compounds with the same functional group but differing by --CH2 - unit is called a homologous series.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: A
A homologous series is a group of compounds that differ by a constant unit, generally a CH2 group.
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Q7:
MULTIPLE CHOICE QUESTION
Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A): CH3Cl is obtained from CH4 by the action of Cl2 in the presence of sunlight.
Reason (R): It is obtained by an additional reaction.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: C
CH3Cl is obtained from CH4 by substitution reaction by the action of Cl2 in the presence of sunlight.
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Q8:
MULTIPLE CHOICE QUESTION
Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A): In esterification, carboxylic acid and alcohol react in the presence of acid to give ester.
Reason (R): Esterification is the reverse of saponification.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: A
In esterification, RCOOH, - H is replaced by - R' of R'OH in the presence of acid to form RCOOR'.
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Q9:
MULTIPLE CHOICE QUESTION
Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A): Acetic acid has six single bonds and one double bond.
Reason (R): It is an unsaturated organic compound.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: A
Acetic acid has a structure which has six single bonds and only one double bond. It is an unsaturated organic compound.
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Q10:
MULTIPLE CHOICE QUESTION
Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A): Esterification is a process in which a sweet smelling substance is produced.
Reason (R): When esters react with sodium hydroxide an alcohol and sodium salt of carboxylic acid are obtained.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: B
Esterification is a reaction in which alcohol like ethanol reacts with carboxylic acids to form esters and water in the presence of sulphuric acid. Esters are generally sweet smelling substances
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