(i) All questions are compulsory.
(ii) Q. no. 1 to 5 are very short answer questions and carry 1 mark each.
(iii) Q. no. 6 to 10 are short answer questions and carry 2 marks each.
(iv) Q. no. 11 to 22 are also short answer questions and carry 3 marks each.
(v) Q. no. 23 is a value based question and carry 4 marks.
(vi) Q. no. 24 to 26 are long answer questions and carry 5 marks each.
(vii) Use log tables if necessary, use of calculators is not allowed.
- Q1VIEW SOLUTION
- Q2VIEW SOLUTION
- Q3VIEW SOLUTION
- Q4VIEW SOLUTION
- Q5VIEW SOLUTION
(a) Following reactions occur at cathode during the electrolysis of aqueous copper(II) chloride solution :VIEW SOLUTION
On the basis of their standard reduction electrode potential (E°) values, which reaction is feasible at the cathode and why ?
(b) State Kohlrausch law of independent migration of ions. Write its one application.
- Q7VIEW SOLUTION
(i) Write down the IUPAC name of the following complex :
(ii) Write the formula for the following complex :VIEW SOLUTION
Name the reagents used in the following reactions:VIEW SOLUTION
What is meant by negative deviation from Raoult's law? Give an example. What is the sign of ∆mixH for negative deviation?
Define azeotropes. What type of azeotrope is formed by negative deviation from Raoult's law? Give an example. VIEW SOLUTION
(a) Why are alkyl halides insoluble in water?VIEW SOLUTION
(b) Why is Butan-1-ol optically inactive but Butan-2-ol is optically active?
(c) Although chlorine is an electron withdrawing group, yet it is ortho-, para- directing in electrophilic aromatic substitution reactions. Why?
How do you convert the following :
(i) Benzoic acid to Benzaldehyde
(ii) Ethyne to Ethanal
(iii) Acetic acid to Methane
Write the equations involved in the following reactions :
(i) Stephen reaction
(ii) Wolff-Kishner reduction
(iii) Etard reaction VIEW SOLUTION
Calculate the mass of NaCl (molar mass = 58.5 g mol−1) to be dissolved in 37.2 g of water to lower the freezing point by 2°C, assuming that NaCl undergoes complete dissociation. (Kf for water = 1.86 K kg mol−1)VIEW SOLUTION
- Q14VIEW SOLUTION
(i) Which one of the following is a monosaccharide:VIEW SOLUTION
starch, maltose, fructose, cellulose
(ii) What is the difference between acidic amino acids and basic amino acids?
(iii) Write the name of the vitamin whose deficiency causes bleeding of gums.
(i) Draw the geometrical isomers of complex [Pt(en)2Cl2]2+.VIEW SOLUTION
(ii) On the basis of crystal field theory, write the electronic configuration for d4 ion, if ∆0 > P.
(iii) Write the hybridization type and magnetic behaviour of the complex [Ni(CN)4]2−. (Atomic number of Ni = 28)
- Q17VIEW SOLUTION
Calculate the emf of the following cell at 25°C :
Zn | Zn2+ (0.001 M) || H+ (0.01 M) | H2(g) (1 bar) | Pt(s)VIEW SOLUTION
- Q19VIEW SOLUTION
- Q20VIEW SOLUTION
(a) How would you account the following :VIEW SOLUTION
(i) Highest fluoride of Mn is MnF4 whereas the highest oxide is Mn2O7.
(ii) Transition metals and their compounds show catalytic properties.
(b) Complete the following equation :
Give reasons for the following observations :
(i) A delta is formed at the meeting point of sea water and river water.
(ii) NH3 gas adsorbs more readily than N2 gas on the surface of charcoal.
(iii) Powdered substances are more effective adsorbents.VIEW SOLUTION
Seeing the growing cases of diabetes and depression among children, Mr. Chopra, the principal of one reputed school organized a seminar in which he invited parents and principals. They all resolved this issue by strictly banning the junk food in schools and by introducing healthy snacks and drinks like soup, lassi, milk etc. in school canteens. They also decided to make compulsory half an hour physical activities for the students in the morning assembly daily. After six months, Mr. Chopra conducted the health survey in most of the schools and discovered a tremendous improvement in the health of students.
After reading the above passage, answer the following questions :
(i) What are the values (at least two) displayed by Mr. Chopra ?
(ii) As a student, how can you spread awareness about this issue ?
(iii) Why should antidepressant drugs not be taken without consulting a doctor ?
(iv) Give two examples of artificial sweeteners.VIEW SOLUTION
(a) Illustrate the following reactions giving suitable example in each case :
(ii) Coupling reaction
(iii) Acetylation of amines
(b) Describe Hinsberg method for the identification of primary, secondary and tertiary amines. Also write the chemical equations of the reactions involved.
(a) Write the structures of main products when benzene diazonium chloride reacts with the following reagents :
(b) Write the structures of A, B and C in the following reactions :
(a) Define the following terms:
(i) Activation energy
(ii) Rate constant
(b) A first order reaction takes 10 minutes for 25% decomposition. Calculate t1/2 for the reaction.
(Given : log 2 = 0.3010, log 3 = 0.4771, log 4 = 0.6021)
(a) For a chemical reaction R → P, the variation in the concentration, ln [R] vs. time (s) plot is given as
(i) Predict the order of the reaction.
(ii) What is the slope of the curve?
(iii) Write the unit of rate constant for this reaction.
(b) Show that the time required for 99% completion is double of the time required for the completion of 90% reaction. VIEW SOLUTION
(a) Account for the following :
(i) Bond angle in is higher than NH3.
(ii) H2S has lower boiling point than H2O.
(iii) Reducing character decreases from SO2 to TeO2.
(b) Draw the structures of the following :
(i) H4P2O7 (Pyrophosphoric acid)
(a) Draw the structures of the following :
(b) Account for the following :
(i) Iron on reaction with HCl forms FeCl2 nd not FeCl3.(ii) HClO4 is a stronger acid than HClO.
(iii) BiH3 is the strongest reducing agent amongst all the hydrides of group 15.VIEW SOLUTION
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