Assertion : Cyclohexa -2, 4-dieneone does not give positive test for ketones Reason : Enel form of Cyclohexa-2, 4-dieneone is more stable and it under

Assertion : Cyclohexa -2, 4-dieneone does not give positive test for ketones Reason : Enel form of Cyclohexa-2, 4-dieneone is more stable and it under
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Assertion : Cyclohexa -2, 4-dieneone does not give positive test for ketones Reason : Enel form of ... is false D. Assertion is false, Reason is true
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The number of moles of `HIO_(3)` formed during periodic oxidation of cyclohexa (1,2,3) triol____

Description : The number of moles of `HIO_(3)` formed during periodic oxidation of cyclohexa (1,2,3) triol____

Last Answer : The number of moles of `HIO_(3)` formed during periodic oxidation of cyclohexa (1,2,3) triol____

Assertion: Communities that comprise of more species tend to be more stable. Reason: A higher number of species results in less animal variation in to

Description : Assertion: Communities that comprise of more species tend to be more stable. Reason: A higher number of species results in less animal variation in to

Last Answer : Assertion: Communities that comprise of more species tend to be more stable. Reason: A higher number ... D. If both assertion and reason are false.

Assertion:- `N_(2)^(+)` is more stable than `N_(2)^(-)` Reason:- `N_(2)^(+)` has less electrons in antibonding orbital .

Description : Assertion:- `N_(2)^(+)` is more stable than `N_(2)^(-)` Reason:- `N_(2)^(+)` has less electrons in antibonding orbital .

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Assertion :- Water in liquid state is more stable than ice at room temperature. Reason :- Water in liquid from has higher entropy than ice.

Description : Assertion :- Water in liquid state is more stable than ice at room temperature. Reason :- Water in liquid from has higher entropy than ice.

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Assertion :- Lyophilic sol is more stable than lyophobic sol. Reason :- Lyophilic sol have greater solvation energy then lyophobic sol.

Description : Assertion :- Lyophilic sol is more stable than lyophobic sol. Reason :- Lyophilic sol have greater solvation energy then lyophobic sol.

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Assertion :- Any population has built in variation in characteristics. Reason :- Variations are always stable and inheritable.

Description : Assertion :- Any population has built in variation in characteristics. Reason :- Variations are always stable and inheritable.

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Assertion :- Lyophilic sol coagulate by adding other solvent. Reason :- Lyophilic sol are stable due to hydration energy.

Description : Assertion :- Lyophilic sol coagulate by adding other solvent. Reason :- Lyophilic sol are stable due to hydration energy.

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Assertion : After ovulation ruptured graafian follicle transforms into corpus luteum . Reason : Corpus luteum act as endocrine gland and it is stable

Description : Assertion : After ovulation ruptured graafian follicle transforms into corpus luteum . Reason : Corpus luteum act as endocrine gland and it is stable

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Assertion : After fertilization corpus luteum is stable till parturition . Reason : After 3 months of intrauterine , life it dominantly secretes proge

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Serum ketones test?

Description : Serum ketones test?

Last Answer : DefinitionKetones are substances produced when fat cells break down in the blood. A serum ketone test is a measurement of how many ketones are in the blood.Alternative NamesAcetone bodies; Ketones - serum; ... to the needle. The elastic band is removed from your arm.Once the blood has been collecte

Which of the following statements is NOT correct : (a) Tollens' test is given by both aliphatic and aromatic aldehydes. (b) Fehling's test is given by aliphatic aldehydes. It is not given by aromatic aldehydes. (c) Iodoform test is given by methyl ketones and acetaldehydes. (d) Lucas test is given by both aliphatic and aromatic aldehydes

Description : Which of the following statements is NOT correct : (a) Tollens' test is given by both aliphatic and aromatic aldehydes. (b) Fehling's test is given by aliphatic aldehydes. It is not given ... given by methyl ketones and acetaldehydes. (d) Lucas test is given by both aliphatic and aromatic aldehydes

Last Answer : Lucas test is given by both aliphatic and aromatic aldehydes

Aldehydes undergo oxidation with KMnO4/H+ to give (a) Alcohols (b) Acetals (c) Ketones (d) Acids

Description : Aldehydes undergo oxidation with KMnO4/H+ to give (a) Alcohols (b) Acetals (c) Ketones (d) Acids

Last Answer : Acids

Assertion :- First electrons affinity fo all element is positive. Reason :- Successive electron affinity of all elements is negative

Description : Assertion :- First electrons affinity fo all element is positive. Reason :- Successive electron affinity of all elements is negative

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Assertion (A): There is no reaction known for which `DeltaG` is positive, yet it is spontaneous. Reason (R ) : For photochemical reaction, `DeltaG` is

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Assertion : In the reaction, `(1)/(2)O_(2)+F_(2)rarrOF_(2)` Fluorine is oxidant. Reason :- Fluorine cannot show positive oxidation state.

Description : Assertion : In the reaction, `(1)/(2)O_(2)+F_(2)rarrOF_(2)` Fluorine is oxidant. Reason :- Fluorine cannot show positive oxidation state.

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Alldehydes and Ketones react with `NH_(2)OH` to form aldoximes and Ketoximes respectively. Configuration of these can be determined by Beckmann rearra

Description : Alldehydes and Ketones react with `NH_(2)OH` to form aldoximes and Ketoximes respectively. Configuration of these can be determined by Beckmann rearra

Last Answer : Alldehydes and Ketones react with `NH_(2)OH` to form aldoximes and Ketoximes respectively. Configuration of these can be ... A. I B. II C. III D. IV

Alldehydes and Ketones react with `NH_(2)OH` to form aldoximes and Ketoximes respectively. Configuration of these can be determined by Beckmann rearra

Description : Alldehydes and Ketones react with `NH_(2)OH` to form aldoximes and Ketoximes respectively. Configuration of these can be determined by Beckmann rearra

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What property of low-molecular weight aldehydes and ketones accounts for the magnitude of their boiling points? (a) The ability to form strong H-bonds between their molecules. (b) The ability of the carbonyl oxygen to form H-bonds with other carbonyl groups. (c) The ability of the polar carbonyl group to attract other polar molecules. (d) The ability of the carbonyl group to attract electrophiles and form bonds.

Description : What property of low-molecular weight aldehydes and ketones accounts for the magnitude of their boiling points? (a) The ability to form strong H-bonds between their molecules. (b) The ability of ... other polar molecules. (d) The ability of the carbonyl group to attract electrophiles and form bonds.

Last Answer : The ability of the polar carbonyl group to attract other polar molecules.

Ketones react with Grignard reagents to form an addition product which on hydrolysis gives a (a) Primary alcohol (b) Tertiary alcohol (c) Secondary alcohol (d) Ketal

Description : Ketones react with Grignard reagents to form an addition product which on hydrolysis gives a (a) Primary alcohol (b) Tertiary alcohol (c) Secondary alcohol (d) Ketal

Last Answer : Tertiary alcohol

Why are aldehydes more reactive than ketones ?

Description : Why are aldehydes more reactive than ketones ? 

Last Answer : Ans. It is because of 2 reasons : The carboxyl compounds (both aldehydes & ketones) undergo nucleophilic addition reaction. (i) + I effect : The alkyl group in ketones due to their e- ... its reactivity. (ii) Steric hindrance : Due to steric hindrance in ketones, they are less reactive.

The total number of ketones (including stereo isomers ) with the molecular formula `C_(6)H_(12)O` is :

Description : The total number of ketones (including stereo isomers ) with the molecular formula `C_(6)H_(12)O` is :

Last Answer : The total number of ketones (including stereo isomers ) with the molecular formula `C_(6)H_(12)O` is : A. 4 B. 5 C. 6 D. 7

Ketones - urine?

Description : Ketones - urine?

Last Answer : DefinitionA ketones urine test measures the presence or absence of ketones in the urine.Alternative NamesKetone bodies - urine; Urine ketonesHow the test is performedThe test requires a clean catch urine ... .For infants, thoroughly wash the area around the urethra. Open a urine collection bag

HMG CoA is formed in the metabolism of (A) Cholesterol, ketones and leucine (B) Cholesterol, fatty acid and Leucine (C) Lysine, Lecuine and Isoleucine (D) Ketones, Leucine and Lysine

Description : HMG CoA is formed in the metabolism of (A) Cholesterol, ketones and leucine (B) Cholesterol, fatty acid and Leucine (C) Lysine, Lecuine and Isoleucine (D) Ketones, Leucine and Lysine

Last Answer : Answer : A

All the following are ketones except (A) Xylulose (B) Ribolose (C) Erythrose (D) Fructose

Description : All the following are ketones except (A) Xylulose (B) Ribolose (C) Erythrose (D) Fructose

Last Answer : Answer : C

A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of (a) fats (b) amino acids (c) glucose (d) ketones.

Description : A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of (a) fats (b) amino acids (c) glucose (d) ketones.

Last Answer : d) ketones.

Which of the following characterizes the reactions of aldehydes and ketones? (a) electrophilic addition (b) electrophilic substitution (c) nucleophilic acyl substitution (d) nucleophilic addition; free radical addition

Description : Which of the following characterizes the reactions of aldehydes and ketones? (a) electrophilic addition (b) electrophilic substitution (c) nucleophilic acyl substitution (d) nucleophilic addition; free radical addition

Last Answer : nucleophilic addition; free radical addition

Aldehydes can be distinguished from ketones by using (a) Ammoniacal AgNO3 solution (b) Phenylhydrazine (c) Saturated NaHSO3 solution (d) Thionyl chloride

Description : Aldehydes can be distinguished from ketones by using (a) Ammoniacal AgNO3 solution (b) Phenylhydrazine (c) Saturated NaHSO3 solution (d) Thionyl chloride

Last Answer : Ammoniacal AgNO3 solution

Which of the following reagents will react readily with both aldehydes and ketones? (a) Grignard reagent (b) Fehling's reagent (c) Tollens' reagent (d) Schiff's reagen

Description : Which of the following reagents will react readily with both aldehydes and ketones? (a) Grignard reagent (b) Fehling's reagent (c) Tollens' reagent (d) Schiff's reagen

Last Answer : Grignard reagent

Which statement about the carbonyl group of ketones and aldehydes is true? I. It can attract nucleophiles. II. It can attract electrophiles. III. It tends to undergo addition reactions. IV. It tends to undergo substitution reactions. (a) I and III (b) II and IV (c) I, II, and III (d) I, III, and IV

Description : Which statement about the carbonyl group of ketones and aldehydes is true? I. It can attract nucleophiles. II. It can attract electrophiles. III. It tends to undergo addition reactions. IV. It tends to undergo substitution reactions. (a) I and III (b) II and IV (c) I, II, and III (d) I, III, and IV

Last Answer : I, II, and III

Ketones are prepared by the oxidation of (a) Primary alcohol (b) Secondary alcohol (c) Tertiary alcohol (d) None of these

Description : Ketones are prepared by the oxidation of (a) Primary alcohol (b) Secondary alcohol (c) Tertiary alcohol (d) None of these

Last Answer : Secondary alcohol

Which action best accounts for the solubility of aldehydes and ketones in water? (a) Polar interactions between solute molecules. (b) H-bonding between solute molecules. (c) Van der waals forces (d) H-bonding between solute and solvent molecules

Description : Which action best accounts for the solubility of aldehydes and ketones in water? (a) Polar interactions between solute molecules. (b) H-bonding between solute molecules. (c) Van der waals forces (d) H-bonding between solute and solvent molecules

Last Answer : H-bonding between solute and solvent molecules

The melting points of aldehydes and ketones tend to : (a) decrease with increasing molecular weight. (b) increase with increasing molecular weight. (c) remain unchanged with increasing molecular weight. (d) be unpredictable due to resonance

Description : The melting points of aldehydes and ketones tend to : (a) decrease with increasing molecular weight. (b) increase with increasing molecular weight. (c) remain unchanged with increasing molecular weight. (d) be unpredictable due to resonance

Last Answer : increase with increasing molecular weight.

Foaming is caused by the formation of ___________ a) Acids b) Alcohols c) Oils and alkalis d) Ketones

Description : Foaming is caused by the formation of ___________ a) Acids b) Alcohols c) Oils and alkalis d) Ketones

Last Answer : c) Oils and alkalis

The conversion of secondary alcohol to ketones in presence of aluminium isopropoxide and acetone as solvent is? a. Canizarro reaction b. Oppenauer oxidation c. Suzuki reaction d. Aldol Condensation

Description : The conversion of secondary alcohol to ketones in presence of aluminium isopropoxide and acetone as solvent is? a. Canizarro reaction b. Oppenauer oxidation c. Suzuki reaction d. Aldol Condensation

Last Answer : b. Oppenauer oxidation

Ketones are organic compounds. Name the functional group that all ketone molecules contain.

Description : Ketones are organic compounds. Name the functional group that all ketone molecules contain.

Last Answer : ANSWER: CARBONYL GROUP pr C DOUBLE BOND O

Assertion (A) : Dope test is used to estimate the lavel of blood alcohol by analyzing the breath of persons drinking alcohol. Reason (R) : A drunken p

Description : Assertion (A) : Dope test is used to estimate the lavel of blood alcohol by analyzing the breath of persons drinking alcohol. Reason (R) : A drunken p

Last Answer : Assertion (A) : Dope test is used to estimate the lavel of blood alcohol by analyzing the breath of ... D. If both the assertion and reason are false

Give reason: Alkanes are chemically stable.

Description : Give reason: Alkanes are chemically stable.

Last Answer : In alkanes all carbon atoms are bonded to the maximum number of hydrogen atoms. They are made up single bond between carbon atoms and are saturated with hydrogen in every bond is used. Hence they are chemically stable.

Electron-withdrawing groups are meta directors because : (a) the carbonium ion intermediate has a negative charge on the meta position. (b) the more stable resonance hybrid occurs with meta attachment of the electrophile. (c) the less stable resonance hybrid occurs with meta attachment of the electrophile. (d) the carbonium ion intermediate has a positive charge on the meta position

Description : Electron-withdrawing groups are meta directors because : (a) the carbonium ion intermediate has a negative charge on the meta position. (b) the more stable resonance hybrid occurs with meta ... the electrophile. (d) the carbonium ion intermediate has a positive charge on the meta position

Last Answer : the more stable resonance hybrid occurs with meta attachment of the electrophile.

Assertion : The duct - billed Platypus and the spiny anteater, both are egg - laying animals yet are grouped under mammals. Reason : Both of them have

Description : Assertion : The duct - billed Platypus and the spiny anteater, both are egg - laying animals yet are grouped under mammals. Reason : Both of them have

Last Answer : Assertion : The duct - billed Platypus and the spiny anteater, both are egg - laying animals yet ... false D. If both Assertion and Reason are false.

Assertion: Under unlimited resource conditions, popultion can show an exponential growth curve. Reason: The maximum possible number of individuals can

Description : Assertion: Under unlimited resource conditions, popultion can show an exponential growth curve. Reason: The maximum possible number of individuals can

Last Answer : Assertion: Under unlimited resource conditions, popultion can show an exponential growth curve. Reason: The ... Reason are false, then mark (4).

A diabetic develops a severe perineal infection with skin necrosis, subcutaneous crepitance, and drainage of a thin, watery, grayish and foul-smelling fluid. Management should consist of: a. Gram stain of the fluid, which will likely demonstrate multiple bacteria including predominantly gram-positive rods b. A CT scan is indicated in a stable patient to define the extent of the disease c. Broad spectrum antibiotics followed with prompt extensive debridement is indicated d. A safe guideline is to resect infected necrotic tissue so that a several centimeter margin of grossly normal, healthy tissue can be achieved e. A colostomy is of little benefit in this situation

Description : A diabetic develops a severe perineal infection with skin necrosis, subcutaneous crepitance, and drainage of a thin, watery, grayish and foul-smelling fluid. Management should consist of: a. Gram stain ... normal, healthy tissue can be achieved e. A colostomy is of little benefit in this situation

Last Answer : Answer: a, b, c, d The presence of severe perineal infection (referred to as Fournier gangrene when this process involves the perineum and scrotum in males) is associated with a ... often provides improved wound care and patient management, although it is not invariably a positive outcome

The most electro positive stable element?

Description : The most electro positive stable element?

Last Answer : Cesium

The system governed by the equation stable if 14 a. k is positive b. c and k are positive is dynamically c. c is positive

Description : The system governed by the equation stable if 14 a. k is positive b. c and k are positive is dynamically c. c is positive

Last Answer : b. c and k are positive

For stable structures, one of the important properties of flexibility and stiffness matrices is that the elements on the main diagonal (i) Of a stiffness matrix must be positive (ii) Of a stiffness matrix must be negative (iii) Of a flexibility matrix must be positive (iv) Of a flexibility matrix must be negative The correct answer is (A) (i) and (iii) (B) (ii) and (iii) (C) (i) and (iv) (D) (ii) and (iv)

Description : For stable structures, one of the important properties of flexibility and stiffness matrices is that the elements on the main diagonal (i) Of a stiffness matrix must be positive (ii) Of a stiffness matrix must be negative (iii) Of ... ) (B) (ii) and (iii) (C) (i) and (iv) (D) (ii) and (iv)

Last Answer : (A) (i) and (iii)

If root of the characteristics equation has positive real part system is (a) Stable (b)Unstable (C) Marginally stable (d) Linear

Description : If root of the characteristics equation has positive real part system is (a) Stable (b)Unstable (C) Marginally stable (d) Linear

Last Answer : (b)Unstable

For stable molecule the Value of bond order must be.... a) Negative b) Positive c) 0 d) There is no relationship between stability and bond order

Description : For stable molecule the Value of bond order must be.... a) Negative b) Positive c) 0 d) There is no relationship between stability and bond order

Last Answer : b) Positive

Assertion:- Centrioles are essential for mintenance of confinuity of cells in animals. Reason:- Centrioles give rise to spindle apparatus durring divi

Description : Assertion:- Centrioles are essential for mintenance of confinuity of cells in animals. Reason:- Centrioles give rise to spindle apparatus durring divi

Last Answer : Assertion:- Centrioles are essential for mintenance of confinuity of cells in animals. Reason:- Centrioles ... . If both Assertion & Reason are false.

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

Assertion : Nickel can be purified by Mond process. Reason : `Ni(CO)_(4)` is a volatile compound which deomposed at `460K` to give pure `Ni`.

Description : Assertion : Nickel can be purified by Mond process. Reason : `Ni(CO)_(4)` is a volatile compound which deomposed at `460K` to give pure `Ni`.

Last Answer : Assertion : Nickel can be purified by Mond process. Reason : `Ni(CO)_(4)` is a volatile compound which deomposed at `460K` to give pure `Ni`.

Assign the reason for the following: (a) Enthalpy of fusion of water is higher as compared to the hydrides of Sulphur & Selenium. (b) Water is quite stable and does not dissociate in to its elements even at high temperature.

Description : Assign the reason for the following: (a) Enthalpy of fusion of water is higher as compared to the hydrides of Sulphur & Selenium. (b) Water is quite stable and does not dissociate in to its elements even at high temperature.

Last Answer : Ans-a) Due hydrogen bond it has high latent heat of fusion b) Water is a stable compound and its decomposition is not thermodynamically feasible