Q27 of 53 Page 1

On the occasion of World Health Day, Dr. Satpal organized a ‘health camp’ for the poor farmers living in a nearby village. After check-up, he was shocked to see that most of the farmers suffered from cancer due to regular exposure to pesticides and many were diabetic. They distributed free medicines to them. Dr. Satpal immediately reported the matter to the National Human Rights Commission (NHRC). On the suggestions of NHRC, the government decided to provide medical care, financial assistance, setting up of super-speciality hospitals for treatment and prevention of the deadly disease in the affected villages all over India.

(i) Write the values shown by
(a) Dr. Satpal
(b) NHRC.
(ii) What type of analgesics are chiefly used for the relief of pains of terminal cancer?
(iii) Give an example of artificial sweetener that could have been recommended to diabetic patients.


(i) (a) Dr. Satpal showed the values like moral duty towards the society, will to help other people, intelligence, human values, etc.


(b) NHRC displayed values like eagerness to ensure rights to people, helping people , social responsibility, etc.


(ii) Narcotic analgesics like morphine in limited quantity are used for the relief of pains of terminal cancer.


(iii) Saccharin or alitame may be recommended as artificial sweetener


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25

Account for the following:
(i) Primary amines (R-NH2) have higher boiling point than tertiary amines (R3N)
(ii) Aniline does not undergo Friedel – Crafts reaction.
(iii) (CH3)2NH is more basic than (CH3)3N in an aqueous solution.

OR


Give the structures of A, B and C in the following reactions:




 26

Define the following terms as related to proteins:
(i) Peptide linkage
(ii) Primary structure
(iii) Denaturation

 28

(a) Define the following terms:
(i) Molarity
(ii) Molal elevation constant (Kb)

(b) A solution containing 15 g urea (molar mass = 60 g/mol) per litre of solution in water has the same osmotic pressure (isotonic) as a solution of glucose (molar mass = 180 g/mol) in water. Calculate the mass of glucose present in one litre of its solution.


OR


(a) What type of deviation is shown by a mixture of ethanol and acetone? Give reason.


(b) A solution of glucose (molar mass = 180 g/mol) in water is labelled as 10% (by mass). What would be the molality and molarity of the solution?


(Density of solution = 1.2 g/mL)


 29

(a) Complete the following equations:

(i) Cr2O72- + 2OH- →


(ii) MnO4- + 4H+ +3e- →


(b) Account for the following:


(i) Zn is not considered as a transition element.


(ii) Transition metals form a large number of complexes.


(iii) The E0 value for the Mn3+/ Mn2+ couple is much more positive than that for the Cr3+/ Cr2+ couple.


Or


(i) With reference to structural variability and chemical reactivity, write the differences between lanthanoids and actinoids.


(ii) Name a member of the lanthanoid series which is well known to exhibit +4 oxidation state.


(iii) Complete the following equation:


MnO4- + 8H+ + 5e-→


(iv) Out of Mn3+ and Cr3+, which is more paramagnetic and why?


(Atomic no.: Mn= 25, Cr= 24)