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ICSE X CHEMISTRY PAPERS

23 pages, 96 questions, 12 questions with responses, 14 total responses,

Saurabh
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TIWARI TUTORIALS LAST MINUTE PACKAGE CHEMISTRY icse-x Date 16/03/2015 FORGET ABOUT PHYSICS EXAM 2 to 4 pm Take Rest 4 to 5.30 pm Revise ORGANIC CHEMISTRY from Notes and Book 5.30to 6.15 pmSolve following questions 1. An organic compound undergoes addition reactions and gives a red colour precipitate with ammonical cuprous chloride. Therefore, the organic compound could be: A] Ethane B] Ethene C] Ethyne D] Ethanol 2. The organic compound mixed with ethanol to make it spurious is : A] Methanol B] Methanoic acid C] Methanal D] Ethanoic acid 3. Compound A is bubbled through bromine dissolved in carbon tetrachloride and the product is CH2Br - CH2Br. 4. 5. 6. (i) Draw the structural formula of A. (ii) What type of reaction has A undergone? (iii) What is your observation? (iv) Name (not formula) the compound formed when steam reacts with A in the presence of phosphoric acid. (v) What is the producure for converting the product of (b) (iv) back to A? A gaseous hydrocarbon commonly used for welding purposes.Give reason Give reason almost 90% of all known compounds are organic in nature. Give reason it is dangerous to burn methane in an insufficient supply of air. 7. The functional group present in acetic acid is : (A) Ketoneic (B) Hydroxyl OH (C) Aldehydic CHO (D) Carboxyl 8. C+O COOH The unstaturated hydrocarbons undergo : (A) asulbstitution reaction (B) an oxidation reaction (C) an addition reaction (D) none of the above. 9. The number of C H bonds in ethane molecule are : (A) Four (B) Six (C) Eight (D) Ten 10. Write balanced chemical equations for the following : 11. 12. 13. 14. (i) Monochloro ethane is hydrolysed with aqueous KOH. (ii) A mixture of sodalime and sodium acetate is heated. (iii) Ethanol under high pressure and low temperature is treated with acidified potassium dichromate. (iv) Water is added to calcium carbide. (v) Ethanol reacts with sodium at room temperature. Sodium propionate is treated with dilute hydrochloric acid.Give reaction A reaction in which hydrogen of an alkane is replaced by a halogen. Ethene gas and ethane gas.Differentiate. Identify the statement that is incorrect about alkanes :

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