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The major product in the following reaction is:

  • Option 1)

  • Option 2)

  • Option 3)

  • Option 4)

      Basicity of Aromatic Amines - The unshared pair of electrons at the nitrogen atom is in resonance with the benzene ring and hence not fully available for donation as in the case of aniline. -       Nature of group and basicity - Electron withdrawing groups ( -I and -M  effect ) decreases basicity, whereas Electron releasing groups ( +I and +M  effect ) increases basicity. -...

Which of the following statements is not true about sucrose ?

  • Option 1)

    It is a non reducing sugar

  • Option 2)

    The glycosidic linkage is present between C_{1} of \alpha -glucose and C_{1} of \beta -fructose

  • Option 3)

    It is also named as invert sugar

  • Option 4)

    On hydrolysis, it produces glucose and fructose

a) Sucrose is non - reducing sugar b)              . C)  It is invert sugar d) Sucrose  So option (b) is incorrect     it has    Option 1)It is a non reducing sugarOption 2)The glycosidic linkage is present between  of  and  of Option 3)It is also named as invert sugarOption 4)On hydrolysis, it produces glucose and fructose

Glucose and Galactose are having identical configuration in all the positions except position.

  • Option 1)

    C-2

  • Option 2)

    C-5

  • Option 3)

    C-3

  • Option 4)

    C-4

  Preparation of glucose from starch - By the hydrolysis of starch. - wherein        is the position where glucose & galactose have different configuration. option (4) is correctOption 1)Option 2)Option 3)Option 4)

Which of the following statements is not true about RNA ?

  • Option 1)

     
    It controls the synthesis protein

  • Option 2)

    It usually does not replicate

  • Option 3)

    Ith has always double stranded \alpha-helix structure

  • Option 4)

    It is present in the nucleus of the cell.

  Ribonucleic acid (RNA) - Made up of nucleotides consisting of pentose sugar which is ribose, Phosphoric acid and bases (Adenine , Guanine , cytosine and uracil) -     RNA hence has a double stranded -helix structure. Because double stranded structure always belong to DNA & -helix structure belongs to the secondary structure of proteins. option (3) is correct.  Option 1)  It controls the...

Which of the given statement is INCORRECT about glycogen?

 

  • Option 1)

    It is a straight chain polymer similar to amylose.

  • Option 2)

    Only \alpha - linkages are present in the molecule

  • Option 3)

    It is present in animal cells

  • Option 4)

    It is present in some yeast and fungi.

Glucogen is the animal stare generally stored in or body or animal body. so it is found in animal cells. statement 3 is correct. statement 1 is false because the polymeric chain of glycogen is similar to amylopectin, not amylose. Amylose is straight chain polymer & amylopectin is Branched chain polymer. Statement 4 found in yeast & fungi it is a fact statement 2 is correct Option 1)It is a...

Amylopectin is composed of :

  • Option 1)

    \alpha-D-glucose,C_{1}-C_{4}\: \: and\: \: C_{1}-C_{6}\: \: linkages

  • Option 2)

    \beta -D-glucose,C_{1}-C_{4}\: \: and\: \: C_{2}-C_{6}\: \: linkages

  • Option 3)

    \beta -D-glucose,C_{1}-C_{4}\: \: and\: \: C_{1}-C_{6}\: \: linkages

  • Option 4)

    \alpha -D-glucose,C_{1}-C_{4}\: \: and\: \: C_{2}-C_{6}\: \: linkages

Amylopectin is a linear as well as branched chain polymer.  It is a part of starch. It is composed of following linkages: ()  option (1) is correct.Option 1)Option 2)Option 3)Option 4)

Number of stereo centers present in linear and cyclic structures of glucose are respectively :

  • Option 1)

    5 & 4

  • Option 2)

    4 & 4

  • Option 3)

    5 5

  • Option 4)

    4 & 5

No. of Chiral Carbon or structure or stereocenter present in  (a) linear glucose =        (b) Cyclic glucose=  Option 1) & Option 2) & Option 3) & Option 4) & 

Fructose and glucose can be distinguished by:

  • Option 1)

    Benedict's test

  • Option 2)

    Fehling's test

  • Option 3)

    Barfoed's test

  • Option 4)

    Seliwanoff's test

Fructose and glucose can be distinguished by -Seliwanoff's test (1)Barfoed's test:- used for reducing sugar, both are reducing sugar. So both give this test (2)Benedict's test:- used for reducing sugar                                   Both give this test (3)Fehling's test:- Given by reducing sugars. So Both gives this test (4) Seliwanoff's test:- used for fructose and sucrose but Not for...

Maltose on treatment with dilute HCl gives:

 

  • Option 1)

    D- Fructose
     

  • Option 2)

    D- Galactose

  • Option 3)

    D-Glucose and D-Fructose

     

  • Option 4)

    D-Glucose

 
Maltose is disaccharide of Option 1) D- Fructose   Option 2) D- Galactose Option 3) D-Glucose and D-Fructose   Option 4) D-Glucose

Among the following compounds, which one is found in RNA ?

  • Option 1)

  • Option 2)

  • Option 3)

  • Option 4)

  Ribonucleic acid (RNA) - Made up of nucleotides consisting of pentose sugar which is ribose, Phosphoric acid and bases (Adenine , Guanine , cytosine and uracil) -As we know that Uracil is found in RNA The structure of uracil is present in the option fig    Option 1)Option 2)Option 3)Option 4)

Which of the following tests cannot be used for identifying ammino acids?

  • Option 1)

    Barfoed test

  • Option 2)

    Ninhydrin test

  • Option 3)

    xanthoproteic test

  • Option 4)

    Biuret test

  Amino acids - Compounds containing carboxyl and amino groups - wherein   As we have learned in practical chemistry that Amino acids can be identified by Biuret, Xanthoprotic and Ninhydrin test . So the answer is Barford test.Option 1)Barfoed testOption 2)Ninhydrin testOption 3)xanthoproteic testOption 4)Biuret test

The correct structure of histidine in a strongly acidic solution (pH = 2) is :

  • Option 1)

     

     

  • Option 2)

     

  • Option 3)

     

  • Option 4)

     

     

  Amino acids - Compounds containing carboxyl and amino groups - wherein     Classification of amino acids on the basis of side chain nature - Acidic Basic Neutral- All the rest -       As we have learned in zwitteg ion form Option 1)    Option 2)  Option 3)  Option 4)    

The hardness of a  water sample (in terms of equivalents of CaCO_{3}) containing  10^{-3}M \: CaSO_{4} is :

(molar mass of CaSO_{4}=136\: g\: mol^{-1})

  • Option 1)

    10 ppm

  • Option 2)

    90 ppm

  • Option 3)

    100 ppm

  • Option 4)

    50 ppm

  Molar Mass - The mass of one mole of a substance in grams is called its molar mass. - wherein  Molar mass of water = 18 g mol-1     Hardness is most commonly expressed as milligrams of calcium carbonate equivalent per litre. Water containing calcium carbonate at concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l  as we learn in equlibrium initial          a      ...

The incresing order of pK_{a} of the following amino acids in aqueous solution is:Gly\, Asp\: Lys\, Arg

 

 

 

 

 

  • Option 1)

    Asp<Gly< Arg< Lys<

  • Option 2)

    Gly< Asp< Arg< Lys

  • Option 3)

    Asp<Gly< Lys< Arg

  • Option 4)

    Arg< Lys< Gly< Asp

  Amino acids - Compounds containing carboxyl and amino groups - wherein   as we know that: order Option 1)Option 2)Option 3)Option 4)
Engineering
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Biuret test is not given by

  • Option 1)

    proteins

  • Option 2)

    carbohydrates

  • Option 3)

    polypeptide

  • Option 4)

    urea

 
As we learned    Carbohydrates - Optically active polyhydroxy aldehydes and ketones or substances which give such compounds on hydrolysis  - wherein - Made up of carbon , hydrogen and oxygen atoms ,  - Eg. Sugars , cellulose , starch.    The biuret test is a chemical test used for detecting the presence of peptide bond. Carbohydrates donot have peptide bonds.   Option 1) proteins Option...
Engineering
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Which of the following is a biodegradable polymer ?

 

  • Option 1)

  • Option 2)

  • Option 3)

  • Option 4)

 
As we have learned @2126  Nylon 6 is non- biodegradeable polymer  Option 1) Option 2) Option 3) Option 4)
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