Chemistry Paper IV Inorganic Chemistry Previous Year Question Paper Year 2005 : IInd Year

Q.I. Explain any seven of the following:
(i) Chlorine is a stronger oxidizing agent than Iodine.
(ii) PC1S exists but PH5 does not.
(iii) CO2 is a gas while SiO2 is a high melting solid.
(iv) Graphite is a lubricant and a good conductor of
(v) The solubility of group II sulphates decreases as we go down the group.
(vi) Alkali metals are photoconductors.
(vii) Nitric oxide (NO) is paramagnetic.
(viii) NF3 is extremely stable whereas NC13 is easily hydrolysed.
(ix) Sn (II) is a strong reducing agent.
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Q.2. (a) What is roasting? Give examples of ores which are roasted. What is Autoreduction ?
(b) Give the Mond’s process for Nickel extraction and purification.
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Q. 3. (a) Draw a neat diagram and explain zone refining. 3
(b) How is sulphur dioxide prepared ? Illustrate with one example each, its oxidizing and reducing character. Discuss its structure.
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Q. 4. Describe the preparation, properties and structure of Borazine. Why is it called inorganic benzene ?
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Q. 5. (a) What are interhalogen compounds? How are they different from the parent halogens ?

(b) Give the structure of AX3, AX5 and AX7 types of compounds as explained by the VSEPR Theory.
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Q.6. (a) Discuss the nomenclature of oxyacids of phosphorous. Draw the structures of four such acids.

(b) Draw the structures of the oxyacids of Chlorine and explain their relative acidic character.
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