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What type of substance exhibits antiferromagnetism?Marks:1
Those substance which has domain structure similar to ferromagnetic substance, but their domains are oppositely oriented and cancel out each other's magnetic moment, shows antiferromagnetism
Write the IUPAC name of the following compound:Marks:1
Arrange the following compounds in an increasing order of their acid strengths:
(CH3) 2CHCOOH, CH3CH2CH(Br)COOH,CH3CH(Br)CH2COOHMarks:1
(CH3) 2CHCOOH 3CH(Br)CH2COOH < CH3CH2CH(Br)COOH
Write a chemical reaction in which the iodide ion replaces the diazonium group in a diazonium salt.
Name a substance that can be used as an antiseptic as well as a disinfectant.Marks:1
In which one of the two structures,
, the bond angle has a higher value?Marks:1
has higher value of bond angle.
Express the relation between the conductivity and the molar conductivity of a solution.Marks:1
Which has a higher enthalpy of adsorption, physiosorption or chemisorption?`Marks:1
Chemisorption (80-240 kJ mol-1)
List the reactions of glucose, which cannot be explained by its open chain structure.Marks:2
The following reactions of glucose cannot be explained by its open chain structure
It does not give 2,4-DNP test, Schiff’s test and does not form white
precipitate with NaHSO3 despite having –CHO group.
2. The pentaacetate of glucose does not react with hydroxylamine despite
having –CHO group.
Define the following terms in relation to proteins:
(i) Peptide linkage (ii) DenaturationMarks:2
(i) When carboxyl group of one amino acid and amino group of another amino acid are condensed together with elimination of water, it results in formation of -CO-NH- linkage. This linkage is called peptide linkage. This results in formation of dipeptide. (ii) A process that changes the physical and biological properties of the proteins without affecting their chemical composition is called denaturation (of proteins). The denaturation is caused by change in pH or temperature. It breaks the hydrogen bonds existing between protein molecules.