Kurukshetra University 2008 A.M.I.E.T.E Information Technology Chemistry - Question Paper

ques. – 2.
(a) compute the percentage of water of crystallization in hydrated copper sulphate [CuSO4.5H2O] [Cu = 63.5, S = 32, O = 16, H = 1] [Ans. 36.07%]
(b) subsequent data were found from a compound : C = 57.82%, O = 38.58% and rest hydrogen. Its vapour density is 83. obtain its empirical and molecular formula. [C = 12, O = 16, H = 1] [Ans. C4H3O2 and C8H6O4]
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(c) 2KClO3 ? 2KCl + 3O2 ; C + O2 ? CO2
using the above equation, compute the amount of KClO3, which on being heated decomposes to provide a few quantity of O2, which is the quantity needed for the combustion of 24 g of carbon. [K = 39, Cl = 35.5, O = 16, C = 12] [Ans. 163.33 g.]
ques. – 3.
(a) discuss the action of NaOH on the subsequent with suitable chemical equations :
Zn, PbO, ZnO, Al2O3 and Zn(OH)2.
(b) describe the subsequent with suitable example :
Water of crystalisation ; Deliquescence ; Efflorescence ; Electrovalent and Covalent bonds.
ques. – 4.
(a) Write the electron dot formula of the subsequent compounds :
Water, Ammonia, Methane, Oxygen molecule and Carbon tetrachloride.
(b) With reference to the period three of the periodic table – write
(i) The kind of bonding in element whose electronic configuration is 2, 8, 7.
(ii) The formula of the chloride of element whose electronic configuration is 2, 8, 4.
(iii) The nature of the oxide of the alkaline earth metal in this period.
(iv) The number of electrons in the penultimate shell of the element whose valency is – 1.
(v) The electronic configuration of the element whose hodroxide is a weak base.
ques. – 5.
(a) From the list of substance provided beneath select the pair needed to prepare the salts (i) to (v) in the laboratory and write down the relevant equations. The substances are :
Copper, Lead, Sodium, Zinc, Potassium, Copper oxide, Lead carbonate, sodium carbonate solution, Dilute hydrochloric acid, Dilute nitric acid, and dilute sulphuric acid.
(i) Zinc sulphate ; (ii) Copper sulphate ; (iii) Sodium sulphate ; (iv) Lead sulphate and
(v) potassium sulphate.
(b) Name the ions formed when – HCl ; HNO3 ; H2SO4 ; CH3COOH ; NaOH ; NaCl ; Na2CO3 ; H3PO4 ; KOH and NH4OH ionizes in aqueous solution.
ques. – 6.
(a) ‘Iron is electroplated with silver’. (i) describe electroplating. (ii) Draw diagram for electroplating. (iii) State 2 reasons for electroplating. (iv) Why iron is not placed at the anode and silver at the cathode during electroplating ?
(b) provide 1 use with cause of aluminium in (i) metallic, (ii) powder, (iii) foil, (iv) wire and (v) alloyed form.
ques. – 7.
(a) Name 3 chemical products manufactured from nitric acid. provide 2 general uses of HNO3.
(b) Starting from H2S how would you find Sulphur using – (i) chlorine, (ii) SO2, (iii) conc. H2SO4, (iv) oxygen and (v) nitric acid.

Earning:   Approval pending.