General
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Chemistry-

On heating glycerol with conc.H subscript 2 S O subscript 4 comma a compound is obtained which has bad odour. The compound is:

Chemistry-General

  1. Allyl alcohol
  2. Methyl isocyanide
  3. Acrolein
  4. Formic acid

    Answer:The correct answer is: Acrolein

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    General
    chemistry-

    The following reaction is known as 

    In the presence of anhydrous Z n C l subscript 2 comma phenol form salicyladehyde. It is Gattermann-aldehyde reaction.

    The following reaction is known as 

    chemistry-General
    In the presence of anhydrous Z n C l subscript 2 comma phenol form salicyladehyde. It is Gattermann-aldehyde reaction.
    General
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    On conversion into the Grignard reagent followed by treatment with absolute ethanol, how many isomeric alkyl chlorides would yield 2-methylbutane?

    R H space i s space left parenthesis C H subscript 3 right parenthesis subscript 2 space C H bullet C H subscript 2 space C H subscript 3
    Thus, 

    On conversion into the Grignard reagent followed by treatment with absolute ethanol, how many isomeric alkyl chlorides would yield 2-methylbutane?

    chemistry-General
    R H space i s space left parenthesis C H subscript 3 right parenthesis subscript 2 space C H bullet C H subscript 2 space C H subscript 3
    Thus, 
    General
    chemistry-

    At 530 K, glycerol reacts with oxalic acid to produce

    Oxalic acid on reaction with glycerol at 530K temperature furnishallyl alcohol.

    At 530 K, glycerol reacts with oxalic acid to produce

    chemistry-General
    Oxalic acid on reaction with glycerol at 530K temperature furnishallyl alcohol.
    General
    chemistry-

    The conversion of m-nitrophenol to resorcinol involves respectively

    The conversion of m-nitrophenol to resorcinol involves respectively

    chemistry-General
    General
    chemistry-

    What is formed when glycerol reacts with excess of HI?

    When glycerol reacts with HIcomma space i s o minus p r o p y l space iodide is obtained

    What is formed when glycerol reacts with excess of HI?

    chemistry-General
    When glycerol reacts with HIcomma space i s o minus p r o p y l space iodide is obtained
    General
    chemistry-

    The alcohol that produces turbidity immediately with Z n C I subscript 2 divided by c o n c. space H C I at room temperature

    M i x t u r e space o f space a n space h y d r o u s space Z n C l subscript 2 space end subscript a n d space c o n c. H C l is known as Lucas reagent. Lucas test is used for the distinction between primary, secondary and tertiary alcohols.
    The tertiary alcohol reacts immediately with Lucas reagent producing turbidity. The secondary alcohol gives turbidity within 5-10 min and primary alcohol doesn’t give turbidity at all at room temperature. In the given alternates, 2-hydroxy-2-methyl propane is 3 degree spacealcohol, so it is more reactive.

    The alcohol that produces turbidity immediately with Z n C I subscript 2 divided by c o n c. space H C I at room temperature

    chemistry-General
    M i x t u r e space o f space a n space h y d r o u s space Z n C l subscript 2 space end subscript a n d space c o n c. H C l is known as Lucas reagent. Lucas test is used for the distinction between primary, secondary and tertiary alcohols.
    The tertiary alcohol reacts immediately with Lucas reagent producing turbidity. The secondary alcohol gives turbidity within 5-10 min and primary alcohol doesn’t give turbidity at all at room temperature. In the given alternates, 2-hydroxy-2-methyl propane is 3 degree spacealcohol, so it is more reactive.
    General
    chemistry-

    General formula for alcohols is:

    General formula for alcohols is C subscript n H subscript left parenthesis 2 n plus 1 right parenthesis O H. Primary alcohols have negative C H subscript 2 space O H space g p. Secondary Alcohols have  and tertiary alcohols have 

    General formula for alcohols is:

    chemistry-General
    General formula for alcohols is C subscript n H subscript left parenthesis 2 n plus 1 right parenthesis O H. Primary alcohols have negative C H subscript 2 space O H space g p. Secondary Alcohols have  and tertiary alcohols have 
    General
    chemistry-

    An alcohol on alk. K M n O subscript 4 oxidation gives first acetone and on further oxidation acetic acid. It is:

    C H subscript 3 C H subscript 2 O H not stretchy rightwards arrow with left square bracket 0 right square bracket on top C H subscript 3 C H O not stretchy rightwards arrow with left square bracket 0 right square bracket on top C H subscript 3 C O O H  (Aldehyde and acid of same carbon atoms)
    C H subscript 3 C H O H C H subscript 2 not stretchy rightwards arrow with left square bracket O right square bracket on top C H subscript 3 C O C H subscript 3 not stretchy rightwards arrow with left square bracket O right square bracket on top C H subscript 3 C O O H plus H C O O H  (Acid of less carbon atom)

    An alcohol on alk. K M n O subscript 4 oxidation gives first acetone and on further oxidation acetic acid. It is:

    chemistry-General
    C H subscript 3 C H subscript 2 O H not stretchy rightwards arrow with left square bracket 0 right square bracket on top C H subscript 3 C H O not stretchy rightwards arrow with left square bracket 0 right square bracket on top C H subscript 3 C O O H  (Aldehyde and acid of same carbon atoms)
    C H subscript 3 C H O H C H subscript 2 not stretchy rightwards arrow with left square bracket O right square bracket on top C H subscript 3 C O C H subscript 3 not stretchy rightwards arrow with left square bracket O right square bracket on top C H subscript 3 C O O H plus H C O O H  (Acid of less carbon atom)
    General
    chemistry-

    Methanol and ethanol can be distinguished by the following:

    C subscript 2 H subscript 5 O H gives iodoform test.

    Methanol and ethanol can be distinguished by the following:

    chemistry-General
    C subscript 2 H subscript 5 O H gives iodoform test.
    General
    chemistry-

    Which of the following compounds is weakest acid?

    Electron withdrawing groups (like – N O subscript 2 right parenthesis increase the acidity of phenols by stabilising corresponding phenoxide ion. The effect of – N O subscript 2 group will beminimum at m-position due to lack of increased delocalisation of electrons in it. Hence, m-nitrophenol is the weakest acid among these.

    Which of the following compounds is weakest acid?

    chemistry-General
    Electron withdrawing groups (like – N O subscript 2 right parenthesis increase the acidity of phenols by stabilising corresponding phenoxide ion. The effect of – N O subscript 2 group will beminimum at m-position due to lack of increased delocalisation of electrons in it. Hence, m-nitrophenol is the weakest acid among these.
    General
    chemistry-

    How many structural isomers are known for C subscript 4 H subscript 10 O ?

    4 alcohols (butan-1-ol; butan-2-ol; 2-methyl butan-1-ol; 2-methyl butan-2-ol) and 3 ethers (diethyl ether, methyl-propyl ether and methyl isopropyl ether).

    How many structural isomers are known for C subscript 4 H subscript 10 O ?

    chemistry-General
    4 alcohols (butan-1-ol; butan-2-ol; 2-methyl butan-1-ol; 2-methyl butan-2-ol) and 3 ethers (diethyl ether, methyl-propyl ether and methyl isopropyl ether).
    General
    chemistry-

    Ethanol is more soluble in water but ether is less soluble because:


    Both shows H-bonding, however the increase in hydrophobic character (due to two alkyl groups in ether), the H-bonding weakens.

    Ethanol is more soluble in water but ether is less soluble because:

    chemistry-General

    Both shows H-bonding, however the increase in hydrophobic character (due to two alkyl groups in ether), the H-bonding weakens.
    General
    physics-

    Assertion :We cannot produce a real image by plane or convex mirrors under any circumstances
    Reason : The focal length of a convex mirror is always taken as positive

    Assertion :We cannot produce a real image by plane or convex mirrors under any circumstances
    Reason : The focal length of a convex mirror is always taken as positive

    physics-General
    General
    chemistry-

    An organic compound  reacts with P C l subscript 5 to give. The compound  with sodium metal gives n minus b u tan e. space T h u s comma space A space a n d space B space a r e colon

    An organic compound  reacts with P C l subscript 5 to give. The compound  with sodium metal gives n minus b u tan e. space T h u s comma space A space a n d space B space a r e colon

    chemistry-General
    General
    chemistry-

    The acidic character of 1 degree comma 2 degree comma 3 degree spacealcohols, H subscript 2 O and R C identical to C H is of the order

    Alcohols are more acidic than alkynes but less acidic than water thus, the correct order of acidity is H subscript 2 O greater than 1 degree greater than 2 degree greater than 3 degree greater than R C identical to C H

    The acidic character of 1 degree comma 2 degree comma 3 degree spacealcohols, H subscript 2 O and R C identical to C H is of the order

    chemistry-General
    Alcohols are more acidic than alkynes but less acidic than water thus, the correct order of acidity is H subscript 2 O greater than 1 degree greater than 2 degree greater than 3 degree greater than R C identical to C H