Rajasthan Board Class 12 Chemistry II Question Paper 2010

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1 Rajasthan Board Class Chemistry II Question Paper 00 ŸÊ Ê Roll No. No. of Questions 4 SS 4 Chem. II No. of Printed Pages UìÊ ÊäÿÁ UˡÊÊ, 00 SENIOR SECONDARY EXAMINATION, 00 flò ÁÀ flª II ( OPTIONAL GROUP II SCIENCES ) U ÊÿŸ ÁflôÊÊŸ ó ÁmÃËÿ òê ( CHEMISTRY Second Paper ) ÿ 3 4 ÉÊá appleu ÍáÊÊZ 40 ŸÊapple U Ë UáÊÊapple Êapple Êfl ÿ ÊÃÊappleZ Á Uà ÃÈÁ à M apple Á Áπ UˡÊÊÁÕ ÿêapple apple Á Ê Êãÿ ÁŸŒapple Ê GENERAL INSTRUCTIONS TO THE EXAMINEES :. UˡÊÊÕË fl Õ Ÿapple Ÿ òê U ŸÊ Ê ÁŸflÊÿ à Á πapple Candidate must write first his / her Roll No. on the question paper compulsorily.. Ÿ òê apple Á UãŒË fl ª apple Ë M Êãà U apple Á Ë Ê U Ë òêèá U / ãã U / Áfl UÙœÊ Ê UÙŸapple U Á UãŒË Ê Ê apple Ÿ Ù UË ÊŸapple If there is any error / difference / contradiction in Hindi and English versions of the question paper, the question of Hindi version should be treated valid. 3. Ë Ÿ ÁŸflÊÿ Ò U Ÿ Ê 3 fl 4 apple ÊãÃÁ U Áfl À Ò U All questions are compulsory. Question Nos. 3 and 4 have internal choices. 4. àÿapple Ÿ Ê UûÊ U ŒË ªß UûÊ U- ÈÁSÃ Ê apple UË Á πapple Write the answer to each question in the given answer-book only.

2 5. Á Ÿ apple apple Áœ ÊŸ UflÊ apple ʪ Ò U, UŸ Ë ÊªÙ Ê U ÊÕ Ãà Á πapple For questions having more than one part carrying similar marks, the answers of those parts are to be written together in continuity. 6. Ÿ Ê apple øê U ʪ ( i, ii, iii ÃÕÊ iv ) Ò U àÿapple ʪ apple UûÊ U apple øê U Áfl À ( A, B, C fl D ) Ò U UË Áfl À Ê UûÊ UÊˇÊ U UûÊ U- ÈÁSÃ Ê apple ÁŸêŸÊŸÈ Ê U ÃÊÁ Ê ŸÊ U Á πapple There are four parts ( i, ii, iii and iv ) in Question No.. Each part has four alternatives A, B, C and D. Write the letter of the correct alternative in the answer-book at a place by making a table as mentioned below : Ÿ Ê Question No. Ë UûÊ U Ê ÊˇÊ U Correct letter of the Answer.. (ii). (iii). (iv).» Êapple Ò Ë ªãœ flê Ê ê ÿèà ÛÊ Na fl C H 5 ŒappleÃÊ ÒU (A) Ê Êapple ÁÄ Á ê (B) appleà Êapple UÊÚ (C) Ë UÊappleŸ (D) apple Êß«U OH mê UÊ øáÿã UÊapple U An acid derivative having fruity smell on reduction by Na and C OH gives H 5 (A) carboxylic acid (B) alcohol (C) ketone (D) amide. SS 4 Chem. II SS 586-II

3 (ii) ÁŸêŸÁ Áπà apple apple ÊÒŸ- Ê Ê Î Áà ÈU Ÿ UË ÒU? (A) S UÊø (B) Ÿ (C) appleu Ê (D) ŸÊß ÊÚŸ Which is not natural polymer among the following? (A) Starch (B) Wool 3 (C) Silk (D) Nylon. (iii) ŒÊapple apple ËŸÊapple ê Êapple Ë US U Á ÿê apple ŸŸapple flê Ê ãœ U ÊÃÊ ÒU (A) ÊÿÁŸ 㜠(B) UÊß«UÊapple Ÿ 㜠(C) appleå UÊß«U 㜠(D) Ç Êß ÊappleÁ Á«U 㜠The bond formed by reaction of two amino acids with each other is known as (A) ionic bond (B) hydrogen bond (C) peptide bond (D) glycosidic bond. (iv) Ç È ÊappleïÊ øêÿë Ê UÊ ÒU, ÄÿÊapple Á ß apple U ÁSÕà Á ÿêà Í U ÒU (A) appleáà«u UÊß«U (B) Ë UÊappleŸ (C) appleà Êapple UÊÚ (D) Ê Êapple ÁŸ Glucose is reducing sugar because the functional group present in it is (A) aldehyde (B) ketone (C) alcohol (D) carbonyl.. Î ÁòÊ ÃàflÊ Ã UáÊ apple ÿèäã Á ã UË ŒÊapple ˇÊappleåÿ áêêapple apple ŸÊ ŒËÁ Give the names of any two projectile particles in artificial transmutation.

4 3. ÁŸêŸÁ Áπà ŸÊÁ Ëÿ Á Á ÿê Êapple appleõapple ÁflÁœ apple Á Áπ Be + 4 He 6 C + 0 n. Write the following nuclear reaction by Bethe method : 9 4 Be + 4 He 6 C + 0 n. 4. Ê Êapple ÁŸ ÿêò᪠Zn Hg ( Á ª ) ÃÕÊ HCl apple øáÿã UÊapple U appleà apple Ÿ ŸÊÃÊ ÒU Á Á ÿê Ê ŸÊ ŒËÁ A carbonyl compound on reduction by Zn Hg ( zinc amalgam ) and HCl gives an alkane. Give the name of the reaction. 5. È Êapple apple ÉÊ UŸ apple Ê# Ê UÊ ß ÊßÿÊapple apple ŸÊ ŒËÁ Give the names of sugar units obtained on hydrolysis of sucrose. 6. Á Ë apple apple Á appleu áêè Ê ŸÊ fl UøŸÊ ÍòÊ ŒËÁ Á apple Á appleu apple 㺠U ÁSÕà Ÿ UË ÒU Write the name and structural formula of a chiral molecule in which chiral centre is not present. 7. appleõappleÿêú fl» ËŸÊÚ apple Áfl appleœ UŸapple apple Á Êappleß UˡÊáÊ Á Áπ Write one test to differentiate ethanol and phenol. 8. appleáà«u UÊß«U ë appleu øêÿ Ò U UŒÊ U UáÊ Œapple U ÊÊß Aldehydes are good reducing agent. Explain with an example. 9. ÁŸêŸÁ Áπà Êapple UŸ Ë ˇÊÊ U ÃÊ apple UÃapple apple ÿflásõã ËÁ NH 3, C 6 H 5 NH, ( CH 3 ) NH, CH 3 NH. Arrange the following in increasing order of their basicity : NH 3, C 6 H 5 NH, ( CH 3 ) NH, CH 3 NH. SS 4 Chem. II SS 586-II

5 0. C H Cl 5 áêè apple œ ÈflËÿ fl œ ÈflËÿ M Êapple apple UøŸÊà ÍòÊ Á Áπ Write the structural formulae of polar and non-polar forms of C H Cl.. PVC Ë ß Êß Ê ŸÊ ŒËÁ fl PVC Ê U ÿêappleª Á Áπ Give the name of monomer unit of PVC and one use of PVC.. «UË Ÿ apple Áà UáÊ Ê ÁøòÊ ŸÊß Draw a diagram for the replication of DNA. 3. ã Êß «UÊÿS appleuïê mê UÊ Uà appleá Uà Á Á ÿê Ê Ë UáÊ ŒËÁ Write the equation for the reaction catalysed by the enzyme diastase. 4. appleà ËŸ ÖÿÊÁ ÃËÿ ÊflÿflÃÊ ŒÁ Ê Ã UÃË ÒU, À Êߟ Ÿ UË ÊÊß (ii) ÁÇ ÒUÁÀ«U UÊß«U apple R-S ÁflãÿÊ ŒËÁ Alkene shows geometrical isomerism but alkyne does not. Explain. (ii) Give the R-S configurations of glyceraldehyde. + = 5. SÃê A apple ŒÁ Ê Ã ÈU Êapple Ê SÃê B apple ŒÁ Ê Ã UŸ Ë Áfl Êapple ÃÊ Êapple apple Á ÊŸ ËÁ SÃê A SÃê B ŸÊß ÊÚŸ 66 ÃÊ ÈŸêÿ apple apple Êß U (ii) àÿêsõ ÈU (c) ËflË Ë (iii) ÃÊ ÈŒÎ U (d) Ê Î Áà U U (iv) appleu Êapple

6 6 Match the polymers given in Column A with their specialities given in Column B : 4 = Column A Column B Nylone 66 Thermoplastic Bakelite (ii) Elastomer (c) PVC (iii) Thermosetting (d) Natural rubber (iv) Fibres. 6. «UË Ÿ ÃÕÊ Ê U Ÿ apple øê U ÈÅÿ ãã U ŒËÁ Give four main differences between DNA and RNA. 4 = 7. ÊÊß Á Ò apple Ê Ê ÈŸ apple üêapplec U Ò (ii) œÿêÿáÿ Ê Êapple UŒÊ U UáÊ Œapple U ÊÊß Explain how detergent is superior than soap. (ii) Explain cationic detergent with example. + = 8. UÊ apple U áêêappleœ apple ŒÊapple Èπ ªÈáÊ Á Áπ (ii) fláê Í fl fláê flœ Êapple Á U ÊÁ à ËÁ Give two main qualities of rocket propellants. (ii) Define chromophores and auxochromes. + = 9. ÁŸêŸÁ Áπà Êapple Êß«UÊapple apple Á UˇÊapple áê Êäÿ fl Á UÁˇÊåà ÊflSÕÊ ŒËÁ ŒÍœ œè Ê (ii) Á Uá«U Êfl Œ ÊÊ Ÿapple flê Ê ÁøòÊ ŸÊß SS 4 Chem. II SS 586-II

7 7 Give the dispersion medium and dispersed phase in the following colloids : Milk Smoke. (ii) Draw the diagram showing Tyndall effect. + = 0. Al ( OH ) 3 ÿflásõã ËÁ ÊÚ apple Á ÁŸêŸÁ Áπà Êapple UŸ Ë S ãœÿ ˇÊ ÃÊ apple UÃapple apple KCl, K 3 PO 4, K SO 4, K 4 [ Fe ( CN ) 6 ]. (ii) flòlèã áê ø Ÿ Êapple ÁøòÊ mê UÊ ŒÁ Ê Ã ËÁ For Al ( OH ) 3 sol arrange the following in increasing order of their coagulation power : KCl, K 3 PO 4, K SO 4, K 4 [ Fe ( CN ) 6 ]. (ii) Draw labelled diagram for electrophoresis. + =. ÁŸêŸÁ Áπà ŸÊÁ Ëÿ Á Á ÿê Êapple apple X Êapple UøÊÁŸ : 3 Na + 0 n 0 β + X 4 7 N + X 8 0 Ne + 0 β. (ii) ÁŸêŸ ŸÊÁ Ëÿ Á Á ÿê Êapple apple Ê U ÃÊß 38 9 U + 0 n 39 9 U + γ 35 9 U + 0 n 4 56 Ba Kr n.

8 Identify X in the following nuclear reactions : 8 3 Na + 0 n 0 β + X 4 7 N + X 8 0 Ne + 0 β. (ii) Mention the types of the following nuclear reactions : 38 9 U + 0 n 39 9 U + γ 35 9 U + 0 n 4 56 Ba Kr n. 4 =. n-éÿèá U apple ËŸ apple Á ÿêà ÊflÿÁflÿÊapple apple ÍòÊ Á Áπ (ii) Á Uã ª Á mê UÊ ÊÕÁ fl ÁmÃËÿ apple ËŸ apple Á Ê U Áfl appleœ apple Uªapple? (iii) ÊÕÁ apple ËŸ apple ãã U- áêè UÊß«UÊapple Ÿ 㜠Êapple ÁøÁòÊà ËÁ (ii) Write the functional isomers of n-butyl amine. How will you distinguish primary and secondary amines by Hinsberg reagent? (iii) Draw the intermolecular hydrogen bonding in primary amine. + + = 4 3. Êfl U À Êapple UÊÚ apple flÿflêapple apple ŸÊ Á Áπ fl ß Ê U ÿêappleª ŒËÁ (ii) ÊÕÁ fl ÁmÃËÿ À Êapple UÊÚ Ë Áfl UÊß«UÊapple ŸË UáÊ Á Á ÿê Êapple apple Ë UáÊ ŒËÁ (iii) ÁŸêŸÁ Áπà Áfl UøŸÊapple apple Á Ë UáÊ Á Áπ ÊÕÁ apple ËŸ apple ÁÕ appleà Êapple UÊÚ «UÊß ÁÕ ß Õ U apple ÁÕ À Êapple UÊÚ ÕflÊ SS 4 Chem. II SS 586-II

9 Ÿapple appleu Êß U apple ÈÅÿ flÿflêapple apple ŸÊ fl ß Ê U ÿêappleª ŒËÁ 9 (ii) apple«u UU U- ÊŸÊ apple Á Á ÿê apple Ë UáÊ ŒËÁ (iii) «UÊß ÁÕ ß Õ U apple ÁŸêŸÁ Áπà Êapple Êåà UŸapple apple Ë UáÊ ŒËÁ UÊß«UÊÚ UÊÚÄ Ë «UÊß ÁÕ ß Õ U UÄ Êapple UÊapple«UÊß ÁÕ ß Õ U Give the names of components of power alcohol and its one use. (ii) Write the equations for dehydrogenation reactions of primary and secondary alcohol. (iii) Write the equations for the following preparations : Ethyl alcohol from primary amine Ethyl alcohol from diethyl ether. OR Give the names of main components and one use of Natalite. (ii) Write the equations for Laderer-Manasse reaction. (iii) Give the equation obtaining the following from diethyl ether : Hydroperoxy diethyl ether Perchlorodiethyl ether. + + = 4

10 0 4. ÁŸêŸÁ Áπà Áfl UøŸÊapple apple Á Ë UáÊ ŒËÁ apple ËÁ U Ä Êapple UÊß«U apple apple Ë appleu Êß«U apple Ë Uapple Êß«U apple appleáõ ÊÿŸÊß«U (ii) ç È Êapple UÊapple apple ËÁ U ê apple ËÁ U ê apple à U ê ÒU ÊÊß (iii) apple Ë appleu Êß«U Ë ŸÈŸÊŒË UøŸÊ ŸÊß ÕflÊ ÁŸêŸÁ Áπà Áfl UøŸÊapple apple Á Ë UáÊ ŒËÁ apple Ë appleuáà«u UÊß«U apple apple ËÁ U ê apple ËÁ U ê apple apple ËÁ U appleÿ UÊß«UÊß«U (ii) apple ŸË Ê UÊapple Á Á ÿê ŒÁ Ê Ã UŸapple flê apple appleáà«u UÊß«UÊapple Êapple UÊ Á U CCl 3 CHO, CH 3 CHO, C H 5 CHO, C 6 H 5 CHO. (iii) Ê Êapple ÁŸ Í U Ë œ ÈflËÿ UøŸÊ ŸÊß Give equations for the following preparations : Acetamide from acetyl chloride Methyl cyanide from acetamide. (ii) Fluoroacetic acid is more acidic than acetic acid. Explain. (iii) Give the reasonance structure of acetamide. OR SS 4 Chem. II SS 586-II

11 Give equations for the following preparations : Acetic acid from acetaldehyde. Acetic anhydride from acetic acid. (ii) Sort out the aldehydes which give Cannizzaro reaction : CCl 3 CHO, CH 3 CHO, C H 5 CHO, C 6 H 5 CHO. (iii) Draw the polar structure of carbonyl group. + + = 4