Assertion: Intermolecular dehydration is not useful for the perparation of unsymmetrical ethers from primary alcohols Reason: The reaction leads to a

Assertion: Intermolecular dehydration is not useful for the perparation of unsymmetrical ethers from primary alcohols Reason: The reaction leads to a
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Assertion: Intermolecular dehydration is not useful for the perparation of unsymmetrical ethers from primary ... . Assertion is false, Reason is true
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Assertion (A): Dehydration of alcohols can be carried out with Conc `H_(2)SO_(4)` but not with conc HCl Reason (R): `H_(2)SO_(4)` is dibasic while HCl

Description : Assertion (A): Dehydration of alcohols can be carried out with Conc `H_(2)SO_(4)` but not with conc HCl Reason (R): `H_(2)SO_(4)` is dibasic while HCl

Last Answer : Assertion (A): Dehydration of alcohols can be carried out with Conc `H_(2)SO_(4)` but not with conc HCl ... R is false D. A is false but R is true

Assertion (A): Alkyl aryl ethers on reaction with HI give alkyl iodide phenols Reason (R): Aryl - oxygen bond is weaker than alkyl oxygen bond

Description : Assertion (A): Alkyl aryl ethers on reaction with HI give alkyl iodide phenols Reason (R): Aryl - oxygen bond is weaker than alkyl oxygen bond

Last Answer : Assertion (A): Alkyl aryl ethers on reaction with HI give alkyl iodide phenols Reason (R): Aryl - oxygen ... is false D. A is false but R is true

Alcohols can be distinguished from ethers by

Description : Alcohols can be distinguished from ethers by

Last Answer : Alcohols can be distinguished from ethers by A. Sodium metal B. Ester formation C. Iodoform test D. All the above

Which group forms the strongest H-bonds to water molecules? (a) Alcohols (b) Ethers (c) Phenols (d) All equally strong

Description : Which group forms the strongest H-bonds to water molecules? (a) Alcohols (b) Ethers (c) Phenols (d) All equally strong

Last Answer : Phenols

Which of the following show n→ ℿ * electronic transitions? a. Alcohols b. Ethers c.Alkanes d. Aldehydes

Description : Which of the following show n→ ℿ * electronic transitions? a. Alcohols b. Ethers c.Alkanes d. Aldehydes

Last Answer : d. Aldehydes

Assertion: (A) Ethers are relatively inert when compared to `C_(2)H_(5)OH` Reason (R): The hybridization of C and O in `CH_(3)-O-CH_(3) is SP^(3)`

Description : Assertion: (A) Ethers are relatively inert when compared to `C_(2)H_(5)OH` Reason (R): The hybridization of C and O in `CH_(3)-O-CH_(3) is SP^(3)`

Last Answer : Assertion: (A) Ethers are relatively inert when compared to `C_(2)H_(5)OH` Reason (R): The hybridization of ... R is false D. A is false but R is true

To bring about dehydration of alcohols we can use

Description : To bring about dehydration of alcohols we can use

Last Answer : To bring about dehydration of alcohols we can use A. Conc. `H_(2)SO_(4)` B. anhydrous `Al_(2)O_(3)` C. ZnO D. both 1,2

The acid-catalyzed dehydration mechanism for alcohols is best described as a(n) : (a) E1 . (b) E2 . (c) SN1 (d) SN2

Description : The acid-catalyzed dehydration mechanism for alcohols is best described as a(n) : (a) E1 . (b) E2 . (c) SN1 (d) SN2

Last Answer : E1 .

Assertion : Phenols are more acidic than aliphatic alcohols. Reason : Phenoxides are stabilized by resonance.

Description : Assertion : Phenols are more acidic than aliphatic alcohols. Reason : Phenoxides are stabilized by resonance.

Last Answer : Assertion : Phenols are more acidic than aliphatic alcohols. Reason : Phenoxides are stabilized by resonance. ... D. A is incorrect but R is correct

Assertion : Escherichia coli, Shigella sp. And salmonella sp. Are all responsible for diarrhoeal diseases. Reason : Dehydration is common to all types

Description : Assertion : Escherichia coli, Shigella sp. And salmonella sp. Are all responsible for diarrhoeal diseases. Reason : Dehydration is common to all types

Last Answer : Assertion : Escherichia coli, Shigella sp. And salmonella sp. Are all responsible for diarrhoeal ... If both the assertion and reason are false

Which of the following will give unsymmetrical di-substituted urea after reaction with `CH_(3)NH_(2)`?

Description : Which of the following will give unsymmetrical di-substituted urea after reaction with `CH_(3)NH_(2)`?

Last Answer : Which of the following will give unsymmetrical di-substituted urea after reaction with `CH_(3)NH_(2)`? A. ` ... `CH_(3)CH_(2)NCO` D. all of these

A tertiary alcohol (H) upon acid-catalysed dehydration gives a product (I). Ozonolysis of (I) leads to compounds (J) and (K). Compound (J) upon reacti

Description : A tertiary alcohol (H) upon acid-catalysed dehydration gives a product (I). Ozonolysis of (I) leads to compounds (J) and (K). Compound (J) upon reacti

Last Answer : A tertiary alcohol (H) upon acid-catalysed dehydration gives a product (I). Ozonolysis of (I) leads to compounds ... ,PhCOCH_(3)` and `PhCOO^(-)K^(+)`

A tertiary alcohol (H) upon acid-catalysed dehydration gives a product (I). Ozonolysis of (I) leads to compounds (J) and (K). Compound (J) upon reacti

Description : A tertiary alcohol (H) upon acid-catalysed dehydration gives a product (I). Ozonolysis of (I) leads to compounds (J) and (K). Compound (J) upon reacti

Last Answer : A tertiary alcohol (H) upon acid-catalysed dehydration gives a product (I). Ozonolysis of (I) leads to ... is formed by the reaction of: B. C. D.

Assertion `:-` Haemodialysis method is used in case of kidney failure. Reason `:-` Malfunctioning of kidney leads to uremia.

Description : Assertion `:-` Haemodialysis method is used in case of kidney failure. Reason `:-` Malfunctioning of kidney leads to uremia.

Last Answer : Assertion `:-` Haemodialysis method is used in case of kidney failure. Reason `:-` Malfunctioning of ... . D. If both Assertion & Reason are false.

Assertion `:-` Rh factor is considered in blood transfusion. Reason `:-` Rh antigen may leads agglutination of blood.

Description : Assertion `:-` Rh factor is considered in blood transfusion. Reason `:-` Rh antigen may leads agglutination of blood.

Last Answer : Assertion `:-` Rh factor is considered in blood transfusion. Reason `:-` Rh antigen may leads ... . D. If both Assertion & Reason are false.

Assertion :- Telophase-I leads to formation of diad of cells. Reason :- During Anaphse-I is marked by completion of karyokinesis and cytokinesis as we

Description : Assertion :- Telophase-I leads to formation of diad of cells. Reason :- During Anaphse-I is marked by completion of karyokinesis and cytokinesis as we

Last Answer : Assertion :- Telophase-I leads to formation of diad of cells. Reason :- During Anaphse-I is marked ... . D. If both Assertion & Reason are false.

Assertion :- Cell growth results into division Reason :- Cell growth leads to change in nucleocytoplasmic ratio.

Description : Assertion :- Cell growth results into division Reason :- Cell growth leads to change in nucleocytoplasmic ratio.

Last Answer : Assertion :- Cell growth results into division Reason :- Cell growth leads to change in nucleocytoplasmic ... D. If both Assertion & Reason are false.

Assertion: Warm and moist environment can enhance the rate of decomposition Reason: Warm and moist climate leads to create anaerobic condition which p

Description : Assertion: Warm and moist environment can enhance the rate of decomposition Reason: Warm and moist climate leads to create anaerobic condition which p

Last Answer : Assertion: Warm and moist environment can enhance the rate of decomposition Reason: Warm and moist climate ... and Reason are false, then mark (4)

Assertion (A): The development of agriculture and industry leads to the development of tertiary sector. Reason (R): As the agriculture and industrial sectors develop, the demand for storage, transport, banking, insurance, etc, increases. (a) Both A & R are true and R is the correct explanation of A (b) Both A & R are true but R is not the correct explanation of A. (c) A is true but R is false. (d) Both A & R are false.

Description : Assertion (A): The development of agriculture and industry leads to the development of tertiary sector. Reason (R): As the agriculture and industrial sectors develop, the demand for storage, transport, banking, insurance, etc, increases ... A. (c) A is true but R is false. (d) Both A & R are false.

Last Answer : (a) Both A & R are true and R is the correct explanation of A

Assertion(A): High national income leads to better human Development Index Reason(R): Good health and education facilities depends on amount of money spent by govt on these facilities. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true and R is the not correct explanation of A. c) A is correct but R is wrong. d) A is wrong but R is correct.

Description : Assertion(A): High national income leads to better human Development Index Reason(R): Good health and education facilities depends on amount of money spent by govt on these facilities. a) Both A and R are true and R is ... of A. c) A is correct but R is wrong. d) A is wrong but R is correct.

Last Answer : d) A is wrong but R is correct.

Assertion (A). Private location process leads to change in management with change in ownership. Reason (R). Change in management is not a necessary condition for the process of privatisation. A. Both (A) and (R) are correct. B. (A) is correct but (R) is incorrect. C. (A) is incorrect but (R) is correct. D. Both (A) and (R) are incorrect.

Description : Assertion (A). Private location process leads to change in management with change in ownership. Reason (R). Change in management is not a necessary condition for the process of privatisation. A. Both (A) and (R) are ... C. (A) is incorrect but (R) is correct. D. Both (A) and (R) are incorrect.

Last Answer : B. (A) is correct but (R) is incorrect.

The IUPAC name of an unsymmetrical ether with the molecule formula `C_(4)H_(10)O`

Description : The IUPAC name of an unsymmetrical ether with the molecule formula `C_(4)H_(10)O`

Last Answer : The IUPAC name of an unsymmetrical ether with the molecule formula `C_(4)H_(10)O` A. Ethoxypropane B. Methoxyethane C. Ethoxyethane D. Methoxypropane

A molecule whose electrons are distributed unsymmetrical is said to be (a) Ionised (b) Non-ionised (c) Polar (d) Non-polar

Description : A molecule whose electrons are distributed unsymmetrical is said to be (a) Ionised (b) Non-ionised (c) Polar (d) Non-polar

Last Answer : Ans:(c)

State the various types of unsymmetrical faults.

Description : State the various types of unsymmetrical faults.

Last Answer : Line to ground ,line to line and double line to ground faults

What is symmetrical and unsymmetrical fault?

Description : What is symmetrical and unsymmetrical fault?

Last Answer : The fault is called symmetrical fault if the fault current is equal in all the phases. The fault is called unsymmetrical fault if the fault current is not equal in all the phases.

If an unsymmetrical line to ground fault occurs at the secondary terminals of a delta/star, ungrounded

Description : If an unsymmetrical line to ground fault occurs at the secondary terminals of a delta/star, ungrounded transformer, then  (A) zero sequence currents are present on both sides of the transformer  (B) ... side  (D) zero sequence currents are present on the primary side but not on the secondary side

Last Answer : If an unsymmetrical line to ground fault occurs at the secondary terminals of a delta/star, ungrounded transformer, then zero sequence currents are absent on both sides of the transformer 

In the case of an unsymmetrical alternating current the average value must always be taken over?

Description : In the case of an unsymmetrical alternating current the average value must always be taken over?

Last Answer : In the case of an unsymmetrical alternating current the average value must always be taken over the whole cycle.

Assertion : Zone refining method is very useful for producing semiconductors. Reason : Semiconductors are of high purity.

Description : Assertion : Zone refining method is very useful for producing semiconductors. Reason : Semiconductors are of high purity.

Last Answer : Assertion : Zone refining method is very useful for producing semiconductors. Reason : Semiconductors are of high purity.

Assertion(A): Per capita Income is not a useful criterion and should not be used as measure of development. Reason( R) :Kerala with lower per capita income has a better human development ranking than Haryana. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true and R is the not correct explanation of A. c) A is correct but R is wrong. d) A is wrong but R is correct.

Description : Assertion(A): Per capita Income is not a useful criterion and should not be used as measure of development. Reason( R) :Kerala with lower per capita income has a better human development ranking than Haryana. a) Both A ... of A. c) A is correct but R is wrong. d) A is wrong but R is correct.

Last Answer : b) Both A and R are true and R is the not correct explanation of A.

Assertion (A): Learning is a life long process. Reason (R): Learning to be useful must be linked with life processes. Choose the correct Answer from the following code (A) Both (A) and (R) are true and (R) is the correct explanation of (A). (B) Both (A) and (R) are true, but (R) is not the correct explanation of (A). (C) (A) is true, but (R) is false (D) (A) is false, but (R) is true.

Description : Assertion (A): Learning is a life long process. Reason (R): Learning to be useful must be linked with life processes. Choose the correct Answer from the following code (A) Both (A) and (R) are true and (R) is the correct ... (C) (A) is true, but (R) is false (D) (A) is false, but (R) is true.

Last Answer : Answer: B

Classify the following alcohols as primary, secondary, or tertiary :

Description : Classify the following alcohols as primary, secondary, or tertiary :

Last Answer : Classify the following alcohols as primary, secondary, or tertiary : A. `(CH_(3))_(3)C CH_(2)OH` B. `CH_(3)CH( ... `(CH_(3))_(2)C(OH)CH_(2)CH_(3)` D.

How many isomers of `C_(5)H_(11)OH` will be primary alcohols?

Description : How many isomers of `C_(5)H_(11)OH` will be primary alcohols?

Last Answer : How many isomers of `C_(5)H_(11)OH` will be primary alcohols? A. 5 B. 4 C. 2 D. 3

Why is it that secondary alcohols can only undergo a single oxidation step in contrast to primary alcohols?

Description : Why is it that secondary alcohols can only undergo a single oxidation step in contrast to primary alcohols?

Last Answer : 1. Once the oxidation has reached the ketone stage, (primary alcohols on oxidation yield aldehyde where as secondary alcohols on oxidation yield a ketone), it is impossible to put more oxygen atoms on the relevant carbon atom without rupturing the backbone of the molecule.

Aliphatic primary amines react with cold nitrous acid to form (a) Alcohols (b) Diazonium salts (c) Nitriles (d) Nitroalkanes

Description : Aliphatic primary amines react with cold nitrous acid to form (a) Alcohols (b) Diazonium salts (c) Nitriles (d) Nitroalkanes

Last Answer : Alcohols

Primary alcohols have boiling points that are _____________ the corresponding aldehydes. (a) Lower than (b) Higher than (c) About the same

Description : Primary alcohols have boiling points that are _____________ the corresponding aldehydes. (a) Lower than (b) Higher than (c) About the same

Last Answer : Higher than

What two primary factors determine whether or no molecular collision leads to a chemical reaction? w) energy and volume of molecules x) energy and mass of molecules y) energy and orientation of molecules z) orientation and volume of molecules

Description : What two primary factors determine whether or no molecular collision leads to a chemical reaction? w) energy and volume of molecules x) energy and mass of molecules y) energy and orientation of molecules z) orientation and volume of molecules

Last Answer : ANSWER: Y -- ENERGY AND ORIENTATION OF MOLECULES

In primary dehydration (A) Intracellular fluid volume is reduced (B) Intracellular fluid volume remains normal (C) Extracellular fluid volume is much reduced (D) Extracellular fluid volume is much increased

Description : In primary dehydration (A) Intracellular fluid volume is reduced (B) Intracellular fluid volume remains normal (C) Extracellular fluid volume is much reduced (D) Extracellular fluid volume is much increased

Last Answer : Answer : A

Assertion `:-` The primary function of sweat is to facilitate a cooling effect on the body surface. Reason `:-` Small amount of nitrogenous wastes cou

Description : Assertion `:-` The primary function of sweat is to facilitate a cooling effect on the body surface. Reason `:-` Small amount of nitrogenous wastes cou

Last Answer : Assertion `:-` The primary function of sweat is to facilitate a cooling effect on the body surface. ... . D. If both Assertion & Reason are false.

Assertion : Secondary air pollutants are formed by interactin among primary pollutants and are more toxic Reason: DDT is secondary air pollutants

Description : Assertion : Secondary air pollutants are formed by interactin among primary pollutants and are more toxic Reason: DDT is secondary air pollutants

Last Answer : Assertion : Secondary air pollutants are formed by interactin among primary pollutants and are more toxic ... but reason is wrong D. Both are wrong

Assertion: Net primary productivity is gross primary productivity minus respiration. Reason :Secondary productivity is produced by hetrotrophs.

Description : Assertion: Net primary productivity is gross primary productivity minus respiration. Reason :Secondary productivity is produced by hetrotrophs.

Last Answer : Assertion: Net primary productivity is gross primary productivity minus respiration. Reason :Secondary ... If both assertion and reason are false.

Assertion : During oogenesis polar bodies are formed . Reason : Primary function of formation of polarbodies is to bring haploidy of ovum .

Description : Assertion : During oogenesis polar bodies are formed . Reason : Primary function of formation of polarbodies is to bring haploidy of ovum .

Last Answer : Assertion : During oogenesis polar bodies are formed . Reason : Primary function of formation of ... . If both Assertion & Reason are False.

Assertion : Primary spermatocytes of testes are haploid . Reason : Primary spermatocytes are formed by meiosis I in the spermatogonia .

Description : Assertion : Primary spermatocytes of testes are haploid . Reason : Primary spermatocytes are formed by meiosis I in the spermatogonia .

Last Answer : Assertion : Primary spermatocytes of testes are haploid . Reason : Primary spermatocytes are formed by ... . If both Assertion & Reason are False.

Assertion : During follicular phase , the primary follicles in the ovary grow to become a fully mature Graafian follicle . Reason : Endometrium of ute

Description : Assertion : During follicular phase , the primary follicles in the ovary grow to become a fully mature Graafian follicle . Reason : Endometrium of ute

Last Answer : Assertion : During follicular phase , the primary follicles in the ovary grow to become a fully mature ... D. If both Assertion & Reason are False.

`R-OH + HX to R -X + H_(2)O` In the above reaction the reactivity of different alcohols is

Description : `R-OH + HX to R -X + H_(2)O` In the above reaction the reactivity of different alcohols is

Last Answer : `R-OH + HX to R -X + H_(2)O` In the above reaction the reactivity of different alcohols is ... `gt` secondary D. Secondary `gt` primary `gt` tertiary

The reaction `2ROH + 2Na rarr 2RONa + H_(2)` suggests that alcohols are

Description : The reaction `2ROH + 2Na rarr 2RONa + H_(2)` suggests that alcohols are

Last Answer : The reaction `2ROH + 2Na rarr 2RONa + H_(2)` suggests that alcohols are A. basic B. amphoteric C. neutral D. acidic

Pick out the wrong statement. (A) Linear polymers are formed from bifunctional groups only and are normally thermoplastic (B) Cross-linked branched chain polymers are either elastometric or thermosetting (C) Branching in case of cross-linked polymers caused by small amount of impurities in bifunctional monomer formulation reduces its solubility and increases the softening point (D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction

Description : Pick out the wrong statement. (A) Linear polymers are formed from bifunctional groups only and are normally thermoplastic (B) Cross-linked branched chain polymers are either elastometric or ... (D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction

Last Answer : D) Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction

. Hunsdiecker reaction is used for the preparation of (a) Alkyl chlorides and bromides (b) Alkyl nitrates and nitrites (c) Ketenes (d) Alcohols

Description : . Hunsdiecker reaction is used for the preparation of (a) Alkyl chlorides and bromides (b) Alkyl nitrates and nitrites (c) Ketenes (d) Alcohols

Last Answer : Alkyl chlorides and bromides

Which of the following alcohols can be prepared by the reaction of methyl formate with excess Grignard reagent? (a) 1-pentanol (b) 2-pentanol (c) 3-pentanol (d) 2-methyl-2-pentanol

Description : Which of the following alcohols can be prepared by the reaction of methyl formate with excess Grignard reagent? (a) 1-pentanol (b) 2-pentanol (c) 3-pentanol (d) 2-methyl-2-pentanol

Last Answer : 3-pentanol

Ethers are isomeric with

Description : Ethers are isomeric with

Last Answer : Ethers are isomeric with A. Aldehydes B. Acids C. Alcohols D. Ketones

Which of the following types of ethers cannot be sythesized by Williamson synthesis ?

Description : Which of the following types of ethers cannot be sythesized by Williamson synthesis ?

Last Answer : Which of the following types of ethers cannot be sythesized by Williamson synthesis ? A. `H_(3)C-overset(CH_(3)) ... 5)-O-C_(6)H_(5)` D. None of these