Past Year Paper, Chemistry (Set - 1 ), Outside Delhi, 2015, Class 12, Chemistry | Additional Study Material for Class 12 PDF Download

 Page 1


56/1 1 [P.T.O. 
 
 
 
 
¸üÖê»Ö ®ÖÓ. 
Roll No.  
 
 
 
¸üÃÖÖµÖ®Ö ×¾Ö–ÖÖ®Ö (ÃÖî¨üÖ×®ŸÖÛú) 
CHEMISTRY (Theory)  
×®Ö¬ÖÖÔ׸üŸÖ ÃÖ´ÖµÖ  : 3 ‘ÖÓ™êü ] [ †×¬ÖÛúŸÖ´Ö †ÓÛú  : 70 
Time allowed : 3 hours ] [ Maximum Marks : 70 
 
ÃÖÖ´ÖÖ®µÖ ×®Ö¤ìü¿Ö    : : : :   
 (i) ÃÖ³Öß ¯ÖÏ¿®Ö †×®Ö¾ÖÖµÖÔ Æïü … 
 (ii) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 1 ÃÖê 5 ŸÖÛú †×ŸÖ »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 1 †ÓÛú Æîü …  
 (iii) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 6 ÃÖê 10 ŸÖÛú »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 2 †ÓÛú Æïü … 
 (iv) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 11 ÃÖê 22 ŸÖÛú ³Öß »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 3 †ÓÛ  Æïü … 
 (v) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 23 ´Ö滵ÖÖ¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö Æîü †Öî¸ü ‡ÃÖÛêú ×»Ö‹ 4 †ÓÛú Æïü … 
 (vi) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 24 ÃÖê 26 ŸÖÛú ¤üß‘ÖÔ-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 5 †ÓÛú Æïüü … 
 (vii) µÖפü †Ö¾Ö¿µÖÛúŸÖÖ ÆüÖê, ŸÖÖê »ÖÖòÝÖ ™êü²Ö»ÖÖë ÛúÖ ¯ÖϵÖÖêÝÖ Ûú¸ëü … Ûîú»ÖÛãú»Öê™ü¸üÖë Ûêú ˆ¯ÖµÖÖêÝÖ Ûúß †®Öã´Ö×ŸÖ ®ÖÆüà Æîü … 
 Series : SSO/C 
56/1
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ´ÖãצüŸÖ ¯Öéšü 12 Æïü … 
• ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¤üÖ×Æü®Öê ÆüÖ£Ö Ûúß †Öê¸ü פü‹ ÝÖ‹ ÛúÖê›ü ®Ö´²Ö¸ü ÛúÖê ”ûÖ¡Ö ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü ¯Ö¸ü ×»ÖÜÖë …  
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë 26 ¯ÖÏ¿®Ö Æïü …  
• Ûéú¯ÖµÖÖ ¯ÖÏ¿®Ö ÛúÖ ˆ¢Ö¸ü ×»ÖÜÖ®ÖÖ ¿Öãºþ Ûú¸ü®Öê ÃÖê ¯ÖÆü»Öê, ¯ÖÏ¿®Ö ÛúÖ ÛÎú´ÖÖÓÛú †¾Ö¿µÖ ×»ÖÜÖë …  
• ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌü®Öê Ûêú ×»Ö‹ 15 ×´Ö®Ö™ü ÛúÖ ÃÖ´ÖµÖ ×¤üµÖÖ ÝÖµÖÖ Æîü … ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖ ×¾ÖŸÖ¸üÞÖ ¯Öæ¾ÖÖÔÆËü®Ö ´Öë 10.15 ²Ö•Öê 
×ÛúµÖÖ •ÖÖµÖêÝÖÖ … 10.15 ²Ö•Öê ÃÖê 10.30 ²Ö•Öê ŸÖÛú ”ûÖ¡Ö Ûêú¾Ö»Ö ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌëüÝÖê †Öî¸ü ‡ÃÖ †¾Ö×¬Ö Ûêú ¤üÖî¸üÖ®Ö ¾Öê 
ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ ¯Ö¸ü ÛúÖê‡Ô ˆ¢Ö¸ü ®ÖÆüà ×»ÖÜÖëÝÖê …  
• Please check that this question paper contains 12 printed pages. 
• Code number given on the right hand side of the question paper should be written on the 
title page of the answer-book by the candidate. 
• Please check that this question paper contains 26 questions. 
• Please write down the Serial Number of the question before attempting it. 
• 15 minutes time has been allotted to read this question paper. The question paper will be 
distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will read the 
question paper only and will not write any answer on the answer-book during this period. 
ÛúÖê›ü ®ÖÓ. 
Code No.  
    
¯Ö¸üßõÖÖ£Öá ÛúÖê›ü ÛúÖê ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü 
¯Ö¸ü †¾Ö¿µÖ ×»ÖÜÖë … 
Candidates must write the Code on 
the title page of the answer-book. 
 
SET – 1 
Page 2


56/1 1 [P.T.O. 
 
 
 
 
¸üÖê»Ö ®ÖÓ. 
Roll No.  
 
 
 
¸üÃÖÖµÖ®Ö ×¾Ö–ÖÖ®Ö (ÃÖî¨üÖ×®ŸÖÛú) 
CHEMISTRY (Theory)  
×®Ö¬ÖÖÔ׸üŸÖ ÃÖ´ÖµÖ  : 3 ‘ÖÓ™êü ] [ †×¬ÖÛúŸÖ´Ö †ÓÛú  : 70 
Time allowed : 3 hours ] [ Maximum Marks : 70 
 
ÃÖÖ´ÖÖ®µÖ ×®Ö¤ìü¿Ö    : : : :   
 (i) ÃÖ³Öß ¯ÖÏ¿®Ö †×®Ö¾ÖÖµÖÔ Æïü … 
 (ii) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 1 ÃÖê 5 ŸÖÛú †×ŸÖ »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 1 †ÓÛú Æîü …  
 (iii) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 6 ÃÖê 10 ŸÖÛú »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 2 †ÓÛú Æïü … 
 (iv) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 11 ÃÖê 22 ŸÖÛú ³Öß »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 3 †ÓÛ  Æïü … 
 (v) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 23 ´Ö滵ÖÖ¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö Æîü †Öî¸ü ‡ÃÖÛêú ×»Ö‹ 4 †ÓÛú Æïü … 
 (vi) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 24 ÃÖê 26 ŸÖÛú ¤üß‘ÖÔ-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 5 †ÓÛú Æïüü … 
 (vii) µÖפü †Ö¾Ö¿µÖÛúŸÖÖ ÆüÖê, ŸÖÖê »ÖÖòÝÖ ™êü²Ö»ÖÖë ÛúÖ ¯ÖϵÖÖêÝÖ Ûú¸ëü … Ûîú»ÖÛãú»Öê™ü¸üÖë Ûêú ˆ¯ÖµÖÖêÝÖ Ûúß †®Öã´Ö×ŸÖ ®ÖÆüà Æîü … 
 Series : SSO/C 
56/1
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ´ÖãצüŸÖ ¯Öéšü 12 Æïü … 
• ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¤üÖ×Æü®Öê ÆüÖ£Ö Ûúß †Öê¸ü פü‹ ÝÖ‹ ÛúÖê›ü ®Ö´²Ö¸ü ÛúÖê ”ûÖ¡Ö ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü ¯Ö¸ü ×»ÖÜÖë …  
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë 26 ¯ÖÏ¿®Ö Æïü …  
• Ûéú¯ÖµÖÖ ¯ÖÏ¿®Ö ÛúÖ ˆ¢Ö¸ü ×»ÖÜÖ®ÖÖ ¿Öãºþ Ûú¸ü®Öê ÃÖê ¯ÖÆü»Öê, ¯ÖÏ¿®Ö ÛúÖ ÛÎú´ÖÖÓÛú †¾Ö¿µÖ ×»ÖÜÖë …  
• ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌü®Öê Ûêú ×»Ö‹ 15 ×´Ö®Ö™ü ÛúÖ ÃÖ´ÖµÖ ×¤üµÖÖ ÝÖµÖÖ Æîü … ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖ ×¾ÖŸÖ¸üÞÖ ¯Öæ¾ÖÖÔÆËü®Ö ´Öë 10.15 ²Ö•Öê 
×ÛúµÖÖ •ÖÖµÖêÝÖÖ … 10.15 ²Ö•Öê ÃÖê 10.30 ²Ö•Öê ŸÖÛú ”ûÖ¡Ö Ûêú¾Ö»Ö ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌëüÝÖê †Öî¸ü ‡ÃÖ †¾Ö×¬Ö Ûêú ¤üÖî¸üÖ®Ö ¾Öê 
ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ ¯Ö¸ü ÛúÖê‡Ô ˆ¢Ö¸ü ®ÖÆüà ×»ÖÜÖëÝÖê …  
• Please check that this question paper contains 12 printed pages. 
• Code number given on the right hand side of the question paper should be written on the 
title page of the answer-book by the candidate. 
• Please check that this question paper contains 26 questions. 
• Please write down the Serial Number of the question before attempting it. 
• 15 minutes time has been allotted to read this question paper. The question paper will be 
distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will read the 
question paper only and will not write any answer on the answer-book during this period. 
ÛúÖê›ü ®ÖÓ. 
Code No.  
    
¯Ö¸üßõÖÖ£Öá ÛúÖê›ü ÛúÖê ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü 
¯Ö¸ü †¾Ö¿µÖ ×»ÖÜÖë … 
Candidates must write the Code on 
the title page of the answer-book. 
 
SET – 1 
56/1 2  
General Instructions :   
 (i) All questions are compulsory.  
 (ii) Question number 1 to 5 are very short answer questions and carry 1 mark each. 
 (iii) Question number 6 to 10 are short answer questions and carry 2 marks each.  
 (iv) Question number 11 to 22 are also short answer questions and carry 3 marks each. 
 (v) Question number 23 is a value based question and carry 4 marks. 
 (vi) Question number 24 to 26 are long answer questions and carry 5 marks each. 
 (vii) Use log tables, if necessary. Use of calculators is not allowed.  
 
 
 
1. AgCl ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ÛúÖ Ã™üÖê‡×ÛúµÖÖê´Öß™Òüß ¤üÖêÂÖ ¤ü¿ÖÖÔŸÖÖ Æîü ? 
 What type of stoichiometric defect is shown by AgCl ? 
 
2. ‡´Ö»¿Ö®Ö ŒµÖÖ ÆüÖêŸÖê Æïü ? ‹Ûú ˆ¤üÖÆü¸üÞÖ ¤üßו֋ … 
 What are emulsions ? Give an example. 
 
3. ‘Ûúß»Öê™’ü ¯ÖϳÖÖ¾Ö ÛúÖ ŒµÖÖ ŸÖÖŸ¯ÖµÖÔ ÆüÖêŸÖÖ Æîü ? 
 What is meant by chelate effect ? 
 
4. ×®Ö´®Ö ÛúÖ †Ö‡Ô µÖæ ¯Öß ‹ ÃÖß (IUPAC) ®ÖÖ´Ö ×»Ö×ÜÖ‹ : 
 CH
3
 – CH
2
 – CHO   
 Write the IUPAC name of the following : 
 CH
3
 – CH
2
 – CHO  
 
5. ×®Ö´®Ö ÛúÖê õÖÖ¸üßµÖ õÖ´ÖŸÖÖ Ûêú ²ÖœÌüŸÖê ÛÎú´Ö ´Öë ¾µÖ¾Ö×Ã£ÖŸÖ Ûúßו֋ : 
 ‹ê×®Ö»Öß®Ö, p-®ÖÖ‡™ÒüÖê‹ê×®Ö»Öß®Ö †Öî¸ü p-™üÖ»Ö㇛Ìüß®Ö 
 Arrange the following in increasing order of basic strength : 
 Aniline, p-Nitroaniline and p-Toluidine  
Page 3


56/1 1 [P.T.O. 
 
 
 
 
¸üÖê»Ö ®ÖÓ. 
Roll No.  
 
 
 
¸üÃÖÖµÖ®Ö ×¾Ö–ÖÖ®Ö (ÃÖî¨üÖ×®ŸÖÛú) 
CHEMISTRY (Theory)  
×®Ö¬ÖÖÔ׸üŸÖ ÃÖ´ÖµÖ  : 3 ‘ÖÓ™êü ] [ †×¬ÖÛúŸÖ´Ö †ÓÛú  : 70 
Time allowed : 3 hours ] [ Maximum Marks : 70 
 
ÃÖÖ´ÖÖ®µÖ ×®Ö¤ìü¿Ö    : : : :   
 (i) ÃÖ³Öß ¯ÖÏ¿®Ö †×®Ö¾ÖÖµÖÔ Æïü … 
 (ii) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 1 ÃÖê 5 ŸÖÛú †×ŸÖ »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 1 †ÓÛú Æîü …  
 (iii) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 6 ÃÖê 10 ŸÖÛú »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 2 †ÓÛú Æïü … 
 (iv) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 11 ÃÖê 22 ŸÖÛú ³Öß »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 3 †ÓÛ  Æïü … 
 (v) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 23 ´Ö滵ÖÖ¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö Æîü †Öî¸ü ‡ÃÖÛêú ×»Ö‹ 4 †ÓÛú Æïü … 
 (vi) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 24 ÃÖê 26 ŸÖÛú ¤üß‘ÖÔ-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 5 †ÓÛú Æïüü … 
 (vii) µÖפü †Ö¾Ö¿µÖÛúŸÖÖ ÆüÖê, ŸÖÖê »ÖÖòÝÖ ™êü²Ö»ÖÖë ÛúÖ ¯ÖϵÖÖêÝÖ Ûú¸ëü … Ûîú»ÖÛãú»Öê™ü¸üÖë Ûêú ˆ¯ÖµÖÖêÝÖ Ûúß †®Öã´Ö×ŸÖ ®ÖÆüà Æîü … 
 Series : SSO/C 
56/1
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ´ÖãצüŸÖ ¯Öéšü 12 Æïü … 
• ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¤üÖ×Æü®Öê ÆüÖ£Ö Ûúß †Öê¸ü פü‹ ÝÖ‹ ÛúÖê›ü ®Ö´²Ö¸ü ÛúÖê ”ûÖ¡Ö ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü ¯Ö¸ü ×»ÖÜÖë …  
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë 26 ¯ÖÏ¿®Ö Æïü …  
• Ûéú¯ÖµÖÖ ¯ÖÏ¿®Ö ÛúÖ ˆ¢Ö¸ü ×»ÖÜÖ®ÖÖ ¿Öãºþ Ûú¸ü®Öê ÃÖê ¯ÖÆü»Öê, ¯ÖÏ¿®Ö ÛúÖ ÛÎú´ÖÖÓÛú †¾Ö¿µÖ ×»ÖÜÖë …  
• ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌü®Öê Ûêú ×»Ö‹ 15 ×´Ö®Ö™ü ÛúÖ ÃÖ´ÖµÖ ×¤üµÖÖ ÝÖµÖÖ Æîü … ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖ ×¾ÖŸÖ¸üÞÖ ¯Öæ¾ÖÖÔÆËü®Ö ´Öë 10.15 ²Ö•Öê 
×ÛúµÖÖ •ÖÖµÖêÝÖÖ … 10.15 ²Ö•Öê ÃÖê 10.30 ²Ö•Öê ŸÖÛú ”ûÖ¡Ö Ûêú¾Ö»Ö ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌëüÝÖê †Öî¸ü ‡ÃÖ †¾Ö×¬Ö Ûêú ¤üÖî¸üÖ®Ö ¾Öê 
ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ ¯Ö¸ü ÛúÖê‡Ô ˆ¢Ö¸ü ®ÖÆüà ×»ÖÜÖëÝÖê …  
• Please check that this question paper contains 12 printed pages. 
• Code number given on the right hand side of the question paper should be written on the 
title page of the answer-book by the candidate. 
• Please check that this question paper contains 26 questions. 
• Please write down the Serial Number of the question before attempting it. 
• 15 minutes time has been allotted to read this question paper. The question paper will be 
distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will read the 
question paper only and will not write any answer on the answer-book during this period. 
ÛúÖê›ü ®ÖÓ. 
Code No.  
    
¯Ö¸üßõÖÖ£Öá ÛúÖê›ü ÛúÖê ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü 
¯Ö¸ü †¾Ö¿µÖ ×»ÖÜÖë … 
Candidates must write the Code on 
the title page of the answer-book. 
 
SET – 1 
56/1 2  
General Instructions :   
 (i) All questions are compulsory.  
 (ii) Question number 1 to 5 are very short answer questions and carry 1 mark each. 
 (iii) Question number 6 to 10 are short answer questions and carry 2 marks each.  
 (iv) Question number 11 to 22 are also short answer questions and carry 3 marks each. 
 (v) Question number 23 is a value based question and carry 4 marks. 
 (vi) Question number 24 to 26 are long answer questions and carry 5 marks each. 
 (vii) Use log tables, if necessary. Use of calculators is not allowed.  
 
 
 
1. AgCl ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ÛúÖ Ã™üÖê‡×ÛúµÖÖê´Öß™Òüß ¤üÖêÂÖ ¤ü¿ÖÖÔŸÖÖ Æîü ? 
 What type of stoichiometric defect is shown by AgCl ? 
 
2. ‡´Ö»¿Ö®Ö ŒµÖÖ ÆüÖêŸÖê Æïü ? ‹Ûú ˆ¤üÖÆü¸üÞÖ ¤üßו֋ … 
 What are emulsions ? Give an example. 
 
3. ‘Ûúß»Öê™’ü ¯ÖϳÖÖ¾Ö ÛúÖ ŒµÖÖ ŸÖÖŸ¯ÖµÖÔ ÆüÖêŸÖÖ Æîü ? 
 What is meant by chelate effect ? 
 
4. ×®Ö´®Ö ÛúÖ †Ö‡Ô µÖæ ¯Öß ‹ ÃÖß (IUPAC) ®ÖÖ´Ö ×»Ö×ÜÖ‹ : 
 CH
3
 – CH
2
 – CHO   
 Write the IUPAC name of the following : 
 CH
3
 – CH
2
 – CHO  
 
5. ×®Ö´®Ö ÛúÖê õÖÖ¸üßµÖ õÖ´ÖŸÖÖ Ûêú ²ÖœÌüŸÖê ÛÎú´Ö ´Öë ¾µÖ¾Ö×Ã£ÖŸÖ Ûúßו֋ : 
 ‹ê×®Ö»Öß®Ö, p-®ÖÖ‡™ÒüÖê‹ê×®Ö»Öß®Ö †Öî¸ü p-™üÖ»Ö㇛Ìüß®Ö 
 Arrange the following in increasing order of basic strength : 
 Aniline, p-Nitroaniline and p-Toluidine  
56/1 3 [P.T.O. 
6. ×®Ö´®Ö ¯Ö¤üÖë Ûúß ¯Ö׸ü³ÖÖÂÖÖ‹Ñ ×»Ö×ÜÖµÖê : 
 (i) ´ÖÖê»ÖÖÓ¿Ö (x)  
 (ii) ‹Ûú ×¾Ö»ÖµÖ®Ö Ûúß ´ÖÖê»Ö»ÖŸÖÖ (m) 
 Define the following terms : 
 (i) Mole fraction (x) 
 (ii) Molality of a solution (m) 
 
7. •Ö߸üÖê †Öò›Ôü¸ü †Öî¸ü ׫üŸÖßµÖ †Öò›Ôü¸ü †×³Ö×ÛÎúµÖÖ†Öë Ûêú ×»ÖµÖê ¤ü¸ü ×ãָüÖÓÛúÖë Ûêú µÖæ×®Ö™ü ×»Ö×ÜÖ‹ ˆÃÖ ×ãÖ×ŸÖ ´Öë •Ö²Ö ÃÖÖÓ¦üŸÖÖ 
ÛúÖê mol L
–1 
†Öî¸ü ÃÖ´ÖµÖ ÛúÖê ÃÖêÛúÞ›üÖë ´Öë ×»ÖÜÖÖ ÝÖµÖÖ ÆüÖê … 
 Write units of rate constants for zero order and for the second order reactions if the 
concentration is expressed in mol L
–1 
and time in second.  
 
8. ×®Ö´®Ö Ûú£Ö®ÖÖë Ûúß ¾µÖÖܵÖÖ Ûúßו֋ : 
 (i) ±úÖòñúÖê¸üÃÖ Ûúß †¯ÖêõÖÖ ®ÖÖ‡™ÒüÖê•Ö®Ö ²ÖÆãüŸÖ Ûú´Ö ÃÖ×ÛÎúµÖ Æîü … 
 (ii) NF
3
 ‹Ûú ‰ú´ÖÖõÖê¯Öß ¯Ö¤üÖ£ÖÔ Æîü ¯Ö¸ü®ŸÖã NCl
3
 ‰ú´ÖÖ¿ÖÖêÂÖß ¯Ö¤üÖ£ÖÔ Æîü …    
 Explain the following : 
 (i) Nitrogen is much less reactive than phosphorus. 
 (ii) NF
3
 is an exothermic compound but NCl
3
 is an endothermic compound.  
 
9. ¯ÖÖê™îü×¿ÖµÖ´Ö ¯Ö¸ü´ÖïÝÖ®Öê™ü Ûúß ×®Ö´ÖÖÔÞÖ ×¾Ö×¬Ö ÛúÖ ¾ÖÞÖÔ®Ö Ûúßו֋ … †´»ÖßÛéúŸÖ ¯Ö¸ü´ÖîÓÝÖ®Öê™ü †ÖòŒÃÖî×»ÖÛú †´»Ö Ûêú ÃÖÖ£Ö ÛîúÃÖê 
†×³Ö×ÛÎúµÖÖ Ûú¸üŸÖÖ Æîü ? †×³Ö×ÛÎúµÖÖ Ûêú ×»ÖµÖê †ÖµÖ×®ÖÛú ÃÖ´ÖßÛú¸üÞÖ ×»Ö×ÜÖ‹ … 
†£Ö¾ÖÖ 
 ¯ÖÖê™îü×¿ÖµÖ´Ö ›üÖ‡ÛÎúÖê´Öê™ü Ûúß †ÖòŒÃÖßÛú¸üÞÖ ×ÛÎúµÖÖ ÛúÖ ¾ÖÞÖÔ®Ö Ûúßו֋ †Öî¸ü ‡ÃÖÛúß (i) †ÖµÖÖê›üÖ‡›ü (ii) H
2
S Ûêú ÃÖÖ£Ö 
ÆüÖê®Öê ¾ÖÖ»Öß †×³Ö×ÛÎúµÖÖ†Öë Ûêú ×»ÖµÖê †ÖµÖ×®ÖÛú ÃÖ´ÖßÛú¸üÞÖÖë ÛúÖê ×»Ö×ÜÖ‹ …  
Page 4


56/1 1 [P.T.O. 
 
 
 
 
¸üÖê»Ö ®ÖÓ. 
Roll No.  
 
 
 
¸üÃÖÖµÖ®Ö ×¾Ö–ÖÖ®Ö (ÃÖî¨üÖ×®ŸÖÛú) 
CHEMISTRY (Theory)  
×®Ö¬ÖÖÔ׸üŸÖ ÃÖ´ÖµÖ  : 3 ‘ÖÓ™êü ] [ †×¬ÖÛúŸÖ´Ö †ÓÛú  : 70 
Time allowed : 3 hours ] [ Maximum Marks : 70 
 
ÃÖÖ´ÖÖ®µÖ ×®Ö¤ìü¿Ö    : : : :   
 (i) ÃÖ³Öß ¯ÖÏ¿®Ö †×®Ö¾ÖÖµÖÔ Æïü … 
 (ii) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 1 ÃÖê 5 ŸÖÛú †×ŸÖ »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 1 †ÓÛú Æîü …  
 (iii) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 6 ÃÖê 10 ŸÖÛú »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 2 †ÓÛú Æïü … 
 (iv) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 11 ÃÖê 22 ŸÖÛú ³Öß »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 3 †ÓÛ  Æïü … 
 (v) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 23 ´Ö滵ÖÖ¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö Æîü †Öî¸ü ‡ÃÖÛêú ×»Ö‹ 4 †ÓÛú Æïü … 
 (vi) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 24 ÃÖê 26 ŸÖÛú ¤üß‘ÖÔ-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 5 †ÓÛú Æïüü … 
 (vii) µÖפü †Ö¾Ö¿µÖÛúŸÖÖ ÆüÖê, ŸÖÖê »ÖÖòÝÖ ™êü²Ö»ÖÖë ÛúÖ ¯ÖϵÖÖêÝÖ Ûú¸ëü … Ûîú»ÖÛãú»Öê™ü¸üÖë Ûêú ˆ¯ÖµÖÖêÝÖ Ûúß †®Öã´Ö×ŸÖ ®ÖÆüà Æîü … 
 Series : SSO/C 
56/1
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ´ÖãצüŸÖ ¯Öéšü 12 Æïü … 
• ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¤üÖ×Æü®Öê ÆüÖ£Ö Ûúß †Öê¸ü פü‹ ÝÖ‹ ÛúÖê›ü ®Ö´²Ö¸ü ÛúÖê ”ûÖ¡Ö ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü ¯Ö¸ü ×»ÖÜÖë …  
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë 26 ¯ÖÏ¿®Ö Æïü …  
• Ûéú¯ÖµÖÖ ¯ÖÏ¿®Ö ÛúÖ ˆ¢Ö¸ü ×»ÖÜÖ®ÖÖ ¿Öãºþ Ûú¸ü®Öê ÃÖê ¯ÖÆü»Öê, ¯ÖÏ¿®Ö ÛúÖ ÛÎú´ÖÖÓÛú †¾Ö¿µÖ ×»ÖÜÖë …  
• ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌü®Öê Ûêú ×»Ö‹ 15 ×´Ö®Ö™ü ÛúÖ ÃÖ´ÖµÖ ×¤üµÖÖ ÝÖµÖÖ Æîü … ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖ ×¾ÖŸÖ¸üÞÖ ¯Öæ¾ÖÖÔÆËü®Ö ´Öë 10.15 ²Ö•Öê 
×ÛúµÖÖ •ÖÖµÖêÝÖÖ … 10.15 ²Ö•Öê ÃÖê 10.30 ²Ö•Öê ŸÖÛú ”ûÖ¡Ö Ûêú¾Ö»Ö ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌëüÝÖê †Öî¸ü ‡ÃÖ †¾Ö×¬Ö Ûêú ¤üÖî¸üÖ®Ö ¾Öê 
ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ ¯Ö¸ü ÛúÖê‡Ô ˆ¢Ö¸ü ®ÖÆüà ×»ÖÜÖëÝÖê …  
• Please check that this question paper contains 12 printed pages. 
• Code number given on the right hand side of the question paper should be written on the 
title page of the answer-book by the candidate. 
• Please check that this question paper contains 26 questions. 
• Please write down the Serial Number of the question before attempting it. 
• 15 minutes time has been allotted to read this question paper. The question paper will be 
distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will read the 
question paper only and will not write any answer on the answer-book during this period. 
ÛúÖê›ü ®ÖÓ. 
Code No.  
    
¯Ö¸üßõÖÖ£Öá ÛúÖê›ü ÛúÖê ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü 
¯Ö¸ü †¾Ö¿µÖ ×»ÖÜÖë … 
Candidates must write the Code on 
the title page of the answer-book. 
 
SET – 1 
56/1 2  
General Instructions :   
 (i) All questions are compulsory.  
 (ii) Question number 1 to 5 are very short answer questions and carry 1 mark each. 
 (iii) Question number 6 to 10 are short answer questions and carry 2 marks each.  
 (iv) Question number 11 to 22 are also short answer questions and carry 3 marks each. 
 (v) Question number 23 is a value based question and carry 4 marks. 
 (vi) Question number 24 to 26 are long answer questions and carry 5 marks each. 
 (vii) Use log tables, if necessary. Use of calculators is not allowed.  
 
 
 
1. AgCl ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ÛúÖ Ã™üÖê‡×ÛúµÖÖê´Öß™Òüß ¤üÖêÂÖ ¤ü¿ÖÖÔŸÖÖ Æîü ? 
 What type of stoichiometric defect is shown by AgCl ? 
 
2. ‡´Ö»¿Ö®Ö ŒµÖÖ ÆüÖêŸÖê Æïü ? ‹Ûú ˆ¤üÖÆü¸üÞÖ ¤üßו֋ … 
 What are emulsions ? Give an example. 
 
3. ‘Ûúß»Öê™’ü ¯ÖϳÖÖ¾Ö ÛúÖ ŒµÖÖ ŸÖÖŸ¯ÖµÖÔ ÆüÖêŸÖÖ Æîü ? 
 What is meant by chelate effect ? 
 
4. ×®Ö´®Ö ÛúÖ †Ö‡Ô µÖæ ¯Öß ‹ ÃÖß (IUPAC) ®ÖÖ´Ö ×»Ö×ÜÖ‹ : 
 CH
3
 – CH
2
 – CHO   
 Write the IUPAC name of the following : 
 CH
3
 – CH
2
 – CHO  
 
5. ×®Ö´®Ö ÛúÖê õÖÖ¸üßµÖ õÖ´ÖŸÖÖ Ûêú ²ÖœÌüŸÖê ÛÎú´Ö ´Öë ¾µÖ¾Ö×Ã£ÖŸÖ Ûúßו֋ : 
 ‹ê×®Ö»Öß®Ö, p-®ÖÖ‡™ÒüÖê‹ê×®Ö»Öß®Ö †Öî¸ü p-™üÖ»Ö㇛Ìüß®Ö 
 Arrange the following in increasing order of basic strength : 
 Aniline, p-Nitroaniline and p-Toluidine  
56/1 3 [P.T.O. 
6. ×®Ö´®Ö ¯Ö¤üÖë Ûúß ¯Ö׸ü³ÖÖÂÖÖ‹Ñ ×»Ö×ÜÖµÖê : 
 (i) ´ÖÖê»ÖÖÓ¿Ö (x)  
 (ii) ‹Ûú ×¾Ö»ÖµÖ®Ö Ûúß ´ÖÖê»Ö»ÖŸÖÖ (m) 
 Define the following terms : 
 (i) Mole fraction (x) 
 (ii) Molality of a solution (m) 
 
7. •Ö߸üÖê †Öò›Ôü¸ü †Öî¸ü ׫üŸÖßµÖ †Öò›Ôü¸ü †×³Ö×ÛÎúµÖÖ†Öë Ûêú ×»ÖµÖê ¤ü¸ü ×ãָüÖÓÛúÖë Ûêú µÖæ×®Ö™ü ×»Ö×ÜÖ‹ ˆÃÖ ×ãÖ×ŸÖ ´Öë •Ö²Ö ÃÖÖÓ¦üŸÖÖ 
ÛúÖê mol L
–1 
†Öî¸ü ÃÖ´ÖµÖ ÛúÖê ÃÖêÛúÞ›üÖë ´Öë ×»ÖÜÖÖ ÝÖµÖÖ ÆüÖê … 
 Write units of rate constants for zero order and for the second order reactions if the 
concentration is expressed in mol L
–1 
and time in second.  
 
8. ×®Ö´®Ö Ûú£Ö®ÖÖë Ûúß ¾µÖÖܵÖÖ Ûúßו֋ : 
 (i) ±úÖòñúÖê¸üÃÖ Ûúß †¯ÖêõÖÖ ®ÖÖ‡™ÒüÖê•Ö®Ö ²ÖÆãüŸÖ Ûú´Ö ÃÖ×ÛÎúµÖ Æîü … 
 (ii) NF
3
 ‹Ûú ‰ú´ÖÖõÖê¯Öß ¯Ö¤üÖ£ÖÔ Æîü ¯Ö¸ü®ŸÖã NCl
3
 ‰ú´ÖÖ¿ÖÖêÂÖß ¯Ö¤üÖ£ÖÔ Æîü …    
 Explain the following : 
 (i) Nitrogen is much less reactive than phosphorus. 
 (ii) NF
3
 is an exothermic compound but NCl
3
 is an endothermic compound.  
 
9. ¯ÖÖê™îü×¿ÖµÖ´Ö ¯Ö¸ü´ÖïÝÖ®Öê™ü Ûúß ×®Ö´ÖÖÔÞÖ ×¾Ö×¬Ö ÛúÖ ¾ÖÞÖÔ®Ö Ûúßו֋ … †´»ÖßÛéúŸÖ ¯Ö¸ü´ÖîÓÝÖ®Öê™ü †ÖòŒÃÖî×»ÖÛú †´»Ö Ûêú ÃÖÖ£Ö ÛîúÃÖê 
†×³Ö×ÛÎúµÖÖ Ûú¸üŸÖÖ Æîü ? †×³Ö×ÛÎúµÖÖ Ûêú ×»ÖµÖê †ÖµÖ×®ÖÛú ÃÖ´ÖßÛú¸üÞÖ ×»Ö×ÜÖ‹ … 
†£Ö¾ÖÖ 
 ¯ÖÖê™îü×¿ÖµÖ´Ö ›üÖ‡ÛÎúÖê´Öê™ü Ûúß †ÖòŒÃÖßÛú¸üÞÖ ×ÛÎúµÖÖ ÛúÖ ¾ÖÞÖÔ®Ö Ûúßו֋ †Öî¸ü ‡ÃÖÛúß (i) †ÖµÖÖê›üÖ‡›ü (ii) H
2
S Ûêú ÃÖÖ£Ö 
ÆüÖê®Öê ¾ÖÖ»Öß †×³Ö×ÛÎúµÖÖ†Öë Ûêú ×»ÖµÖê †ÖµÖ×®ÖÛú ÃÖ´ÖßÛú¸üÞÖÖë ÛúÖê ×»Ö×ÜÖ‹ …  
56/1 4  
 Describe the preparation of potassium permanganate. How does the acidified 
permanganate solution react with oxalic acid ? Write the ionic equations for the 
reactions. 
OR 
 Describe the oxidising action of potassium dichromate and write the ionic equations 
for its reaction with (i) an iodide (ii) H
2
S. 
 
10. ‹£Öî®ÖÖò»Ö ÃÖê ‹£Öß®Ö ²Ö®Ö®Öê ´Öë †´»Ö ×®Ö•ÖÔ»ÖßÛú¸üÞÖ Ûúß ×ÛÎúµÖÖ×¾Ö×¬Ö ×»Ö×ÜÖ‹ … 
 Write the mechanism of acid dehydration of ethanol to yield ethene. 
 
11. ×ÃÖ»¾Ö¸ü fcc •ÖÖ»ÖÛú ´Öë ×ÛÎúÙü×»ÖŸÖ ÆüÖêŸÖÖ Æîü … µÖפü µÖæ×®Ö™ü ÃÖê»Ö Ûêú ÛúÖê¸ü Ûúß »Ö´²ÖÖ‡Ô 4.077 × 10
–8
 cm ÆüÖê, ŸÖÖê 
×ÃÖ»¾Ö¸ü ÛúÖ †¬ÖÔ¾µÖÖÃÖ (r) ¯Ö׸üÛú×»ÖŸÖ Ûúßו֋ … 
 Silver crystallises in fcc lattice. If edge length of the unit cell is 4.077 × 10
–8
 cm, then 
calculate the radius of silver atom. 
 
12. Ûêú®Ö-¿ÖãÝÖ¸ü (M.W. 342) ÛúÖ 5 ¯ÖÏ×ŸÖ¿ÖŸÖ ‘ÖÖê»Ö (¦ü¾µÖ´ÖÖ®Ö †Ö¬ÖÖ¸ü ¯Ö¸ü) ‹Ûú ¯Ö¤üÖ£ÖÔ X Ûêú 0.877% ‘ÖÖê»Ö Ûêú ÃÖÖ£Ö 
†Ö‡ÃÖÖê™üÖê×®ÖÛú Æîü … X ÛúÖ †ÖÞÖ×¾ÖÛú ³ÖÖ¸ü ¯Ö׸üÛú×»ÖŸÖ Ûúßו֋ … 
 A 5 percent solution (by mass) of cane-sugar (M.W. 342) is isotonic with 0.877% 
solution of substance X. Find the molecular weight of X. 
 
13. ‹Ûú ¯ÖÏ£Ö´Ö ÛúÖê×™ü †×³Ö×ÛÎúµÖÖ Ûêú ×»ÖµÖê ¤ü¸ü ×ãָüÖÓÛú 60 s
–1 
Æîü … †×³ÖÛúÖ¸üÛú Ûêú ¯ÖÏÖ¸ü×´³ÖÛú ÃÖÖÓ¦üÞÖ ÛúÖê ‡ÃÖÛêú 1/10
 
ŸÖÛú ‘Ö™®Öêê ´Öë ×ÛúŸÖ®ÖÖ ÃÖ´ÖµÖ »ÖÝÖêÝÖÖ ? 
 The rate constant for a first order reaction is 60 s
–1
. How much time will it take to 
reduce the initial concentration of the reactant to its 1/10
th
 value ? 
Page 5


56/1 1 [P.T.O. 
 
 
 
 
¸üÖê»Ö ®ÖÓ. 
Roll No.  
 
 
 
¸üÃÖÖµÖ®Ö ×¾Ö–ÖÖ®Ö (ÃÖî¨üÖ×®ŸÖÛú) 
CHEMISTRY (Theory)  
×®Ö¬ÖÖÔ׸üŸÖ ÃÖ´ÖµÖ  : 3 ‘ÖÓ™êü ] [ †×¬ÖÛúŸÖ´Ö †ÓÛú  : 70 
Time allowed : 3 hours ] [ Maximum Marks : 70 
 
ÃÖÖ´ÖÖ®µÖ ×®Ö¤ìü¿Ö    : : : :   
 (i) ÃÖ³Öß ¯ÖÏ¿®Ö †×®Ö¾ÖÖµÖÔ Æïü … 
 (ii) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 1 ÃÖê 5 ŸÖÛú †×ŸÖ »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 1 †ÓÛú Æîü …  
 (iii) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 6 ÃÖê 10 ŸÖÛú »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 2 †ÓÛú Æïü … 
 (iv) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 11 ÃÖê 22 ŸÖÛú ³Öß »Ö‘Öã-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 3 †ÓÛ  Æïü … 
 (v) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 23 ´Ö滵ÖÖ¬ÖÖ׸üŸÖ ¯ÖÏ¿®Ö Æîü †Öî¸ü ‡ÃÖÛêú ×»Ö‹ 4 †ÓÛú Æïü … 
 (vi) ¯ÖÏ¿®Ö-ÃÖÓܵÖÖ 24 ÃÖê 26 ŸÖÛú ¤üß‘ÖÔ-ˆ¢Ö¸üßµÖ ¯ÖÏ¿®Ö Æïü †Öî¸ü ¯ÖÏŸµÖêÛú ¯ÖÏ¿®Ö Ûêú ×»Ö‹ 5 †ÓÛú Æïüü … 
 (vii) µÖפü †Ö¾Ö¿µÖÛúŸÖÖ ÆüÖê, ŸÖÖê »ÖÖòÝÖ ™êü²Ö»ÖÖë ÛúÖ ¯ÖϵÖÖêÝÖ Ûú¸ëü … Ûîú»ÖÛãú»Öê™ü¸üÖë Ûêú ˆ¯ÖµÖÖêÝÖ Ûúß †®Öã´Ö×ŸÖ ®ÖÆüà Æîü … 
 Series : SSO/C 
56/1
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ´ÖãצüŸÖ ¯Öéšü 12 Æïü … 
• ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë ¤üÖ×Æü®Öê ÆüÖ£Ö Ûúß †Öê¸ü פü‹ ÝÖ‹ ÛúÖê›ü ®Ö´²Ö¸ü ÛúÖê ”ûÖ¡Ö ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü ¯Ö¸ü ×»ÖÜÖë …  
• Ûéú¯ÖµÖÖ •ÖÖÑ“Ö Ûú¸ü »Öë ×Ûú ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ´Öë 26 ¯ÖÏ¿®Ö Æïü …  
• Ûéú¯ÖµÖÖ ¯ÖÏ¿®Ö ÛúÖ ˆ¢Ö¸ü ×»ÖÜÖ®ÖÖ ¿Öãºþ Ûú¸ü®Öê ÃÖê ¯ÖÆü»Öê, ¯ÖÏ¿®Ö ÛúÖ ÛÎú´ÖÖÓÛú †¾Ö¿µÖ ×»ÖÜÖë …  
• ‡ÃÖ ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌü®Öê Ûêú ×»Ö‹ 15 ×´Ö®Ö™ü ÛúÖ ÃÖ´ÖµÖ ×¤üµÖÖ ÝÖµÖÖ Æîü … ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖ ×¾ÖŸÖ¸üÞÖ ¯Öæ¾ÖÖÔÆËü®Ö ´Öë 10.15 ²Ö•Öê 
×ÛúµÖÖ •ÖÖµÖêÝÖÖ … 10.15 ²Ö•Öê ÃÖê 10.30 ²Ö•Öê ŸÖÛú ”ûÖ¡Ö Ûêú¾Ö»Ö ¯ÖÏ¿®Ö-¯Ö¡Ö ÛúÖê ¯ÖœÌëüÝÖê †Öî¸ü ‡ÃÖ †¾Ö×¬Ö Ûêú ¤üÖî¸üÖ®Ö ¾Öê 
ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ ¯Ö¸ü ÛúÖê‡Ô ˆ¢Ö¸ü ®ÖÆüà ×»ÖÜÖëÝÖê …  
• Please check that this question paper contains 12 printed pages. 
• Code number given on the right hand side of the question paper should be written on the 
title page of the answer-book by the candidate. 
• Please check that this question paper contains 26 questions. 
• Please write down the Serial Number of the question before attempting it. 
• 15 minutes time has been allotted to read this question paper. The question paper will be 
distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will read the 
question paper only and will not write any answer on the answer-book during this period. 
ÛúÖê›ü ®ÖÓ. 
Code No.  
    
¯Ö¸üßõÖÖ£Öá ÛúÖê›ü ÛúÖê ˆ¢Ö¸ü-¯Öã×ßÖÛúÖ Ûêú ´ÖãÜÖ-¯Öéšü 
¯Ö¸ü †¾Ö¿µÖ ×»ÖÜÖë … 
Candidates must write the Code on 
the title page of the answer-book. 
 
SET – 1 
56/1 2  
General Instructions :   
 (i) All questions are compulsory.  
 (ii) Question number 1 to 5 are very short answer questions and carry 1 mark each. 
 (iii) Question number 6 to 10 are short answer questions and carry 2 marks each.  
 (iv) Question number 11 to 22 are also short answer questions and carry 3 marks each. 
 (v) Question number 23 is a value based question and carry 4 marks. 
 (vi) Question number 24 to 26 are long answer questions and carry 5 marks each. 
 (vii) Use log tables, if necessary. Use of calculators is not allowed.  
 
 
 
1. AgCl ×ÛúÃÖ ¯ÖÏÛúÖ¸ü ÛúÖ Ã™üÖê‡×ÛúµÖÖê´Öß™Òüß ¤üÖêÂÖ ¤ü¿ÖÖÔŸÖÖ Æîü ? 
 What type of stoichiometric defect is shown by AgCl ? 
 
2. ‡´Ö»¿Ö®Ö ŒµÖÖ ÆüÖêŸÖê Æïü ? ‹Ûú ˆ¤üÖÆü¸üÞÖ ¤üßו֋ … 
 What are emulsions ? Give an example. 
 
3. ‘Ûúß»Öê™’ü ¯ÖϳÖÖ¾Ö ÛúÖ ŒµÖÖ ŸÖÖŸ¯ÖµÖÔ ÆüÖêŸÖÖ Æîü ? 
 What is meant by chelate effect ? 
 
4. ×®Ö´®Ö ÛúÖ †Ö‡Ô µÖæ ¯Öß ‹ ÃÖß (IUPAC) ®ÖÖ´Ö ×»Ö×ÜÖ‹ : 
 CH
3
 – CH
2
 – CHO   
 Write the IUPAC name of the following : 
 CH
3
 – CH
2
 – CHO  
 
5. ×®Ö´®Ö ÛúÖê õÖÖ¸üßµÖ õÖ´ÖŸÖÖ Ûêú ²ÖœÌüŸÖê ÛÎú´Ö ´Öë ¾µÖ¾Ö×Ã£ÖŸÖ Ûúßו֋ : 
 ‹ê×®Ö»Öß®Ö, p-®ÖÖ‡™ÒüÖê‹ê×®Ö»Öß®Ö †Öî¸ü p-™üÖ»Ö㇛Ìüß®Ö 
 Arrange the following in increasing order of basic strength : 
 Aniline, p-Nitroaniline and p-Toluidine  
56/1 3 [P.T.O. 
6. ×®Ö´®Ö ¯Ö¤üÖë Ûúß ¯Ö׸ü³ÖÖÂÖÖ‹Ñ ×»Ö×ÜÖµÖê : 
 (i) ´ÖÖê»ÖÖÓ¿Ö (x)  
 (ii) ‹Ûú ×¾Ö»ÖµÖ®Ö Ûúß ´ÖÖê»Ö»ÖŸÖÖ (m) 
 Define the following terms : 
 (i) Mole fraction (x) 
 (ii) Molality of a solution (m) 
 
7. •Ö߸üÖê †Öò›Ôü¸ü †Öî¸ü ׫üŸÖßµÖ †Öò›Ôü¸ü †×³Ö×ÛÎúµÖÖ†Öë Ûêú ×»ÖµÖê ¤ü¸ü ×ãָüÖÓÛúÖë Ûêú µÖæ×®Ö™ü ×»Ö×ÜÖ‹ ˆÃÖ ×ãÖ×ŸÖ ´Öë •Ö²Ö ÃÖÖÓ¦üŸÖÖ 
ÛúÖê mol L
–1 
†Öî¸ü ÃÖ´ÖµÖ ÛúÖê ÃÖêÛúÞ›üÖë ´Öë ×»ÖÜÖÖ ÝÖµÖÖ ÆüÖê … 
 Write units of rate constants for zero order and for the second order reactions if the 
concentration is expressed in mol L
–1 
and time in second.  
 
8. ×®Ö´®Ö Ûú£Ö®ÖÖë Ûúß ¾µÖÖܵÖÖ Ûúßו֋ : 
 (i) ±úÖòñúÖê¸üÃÖ Ûúß †¯ÖêõÖÖ ®ÖÖ‡™ÒüÖê•Ö®Ö ²ÖÆãüŸÖ Ûú´Ö ÃÖ×ÛÎúµÖ Æîü … 
 (ii) NF
3
 ‹Ûú ‰ú´ÖÖõÖê¯Öß ¯Ö¤üÖ£ÖÔ Æîü ¯Ö¸ü®ŸÖã NCl
3
 ‰ú´ÖÖ¿ÖÖêÂÖß ¯Ö¤üÖ£ÖÔ Æîü …    
 Explain the following : 
 (i) Nitrogen is much less reactive than phosphorus. 
 (ii) NF
3
 is an exothermic compound but NCl
3
 is an endothermic compound.  
 
9. ¯ÖÖê™îü×¿ÖµÖ´Ö ¯Ö¸ü´ÖïÝÖ®Öê™ü Ûúß ×®Ö´ÖÖÔÞÖ ×¾Ö×¬Ö ÛúÖ ¾ÖÞÖÔ®Ö Ûúßו֋ … †´»ÖßÛéúŸÖ ¯Ö¸ü´ÖîÓÝÖ®Öê™ü †ÖòŒÃÖî×»ÖÛú †´»Ö Ûêú ÃÖÖ£Ö ÛîúÃÖê 
†×³Ö×ÛÎúµÖÖ Ûú¸üŸÖÖ Æîü ? †×³Ö×ÛÎúµÖÖ Ûêú ×»ÖµÖê †ÖµÖ×®ÖÛú ÃÖ´ÖßÛú¸üÞÖ ×»Ö×ÜÖ‹ … 
†£Ö¾ÖÖ 
 ¯ÖÖê™îü×¿ÖµÖ´Ö ›üÖ‡ÛÎúÖê´Öê™ü Ûúß †ÖòŒÃÖßÛú¸üÞÖ ×ÛÎúµÖÖ ÛúÖ ¾ÖÞÖÔ®Ö Ûúßו֋ †Öî¸ü ‡ÃÖÛúß (i) †ÖµÖÖê›üÖ‡›ü (ii) H
2
S Ûêú ÃÖÖ£Ö 
ÆüÖê®Öê ¾ÖÖ»Öß †×³Ö×ÛÎúµÖÖ†Öë Ûêú ×»ÖµÖê †ÖµÖ×®ÖÛú ÃÖ´ÖßÛú¸üÞÖÖë ÛúÖê ×»Ö×ÜÖ‹ …  
56/1 4  
 Describe the preparation of potassium permanganate. How does the acidified 
permanganate solution react with oxalic acid ? Write the ionic equations for the 
reactions. 
OR 
 Describe the oxidising action of potassium dichromate and write the ionic equations 
for its reaction with (i) an iodide (ii) H
2
S. 
 
10. ‹£Öî®ÖÖò»Ö ÃÖê ‹£Öß®Ö ²Ö®Ö®Öê ´Öë †´»Ö ×®Ö•ÖÔ»ÖßÛú¸üÞÖ Ûúß ×ÛÎúµÖÖ×¾Ö×¬Ö ×»Ö×ÜÖ‹ … 
 Write the mechanism of acid dehydration of ethanol to yield ethene. 
 
11. ×ÃÖ»¾Ö¸ü fcc •ÖÖ»ÖÛú ´Öë ×ÛÎúÙü×»ÖŸÖ ÆüÖêŸÖÖ Æîü … µÖפü µÖæ×®Ö™ü ÃÖê»Ö Ûêú ÛúÖê¸ü Ûúß »Ö´²ÖÖ‡Ô 4.077 × 10
–8
 cm ÆüÖê, ŸÖÖê 
×ÃÖ»¾Ö¸ü ÛúÖ †¬ÖÔ¾µÖÖÃÖ (r) ¯Ö׸üÛú×»ÖŸÖ Ûúßו֋ … 
 Silver crystallises in fcc lattice. If edge length of the unit cell is 4.077 × 10
–8
 cm, then 
calculate the radius of silver atom. 
 
12. Ûêú®Ö-¿ÖãÝÖ¸ü (M.W. 342) ÛúÖ 5 ¯ÖÏ×ŸÖ¿ÖŸÖ ‘ÖÖê»Ö (¦ü¾µÖ´ÖÖ®Ö †Ö¬ÖÖ¸ü ¯Ö¸ü) ‹Ûú ¯Ö¤üÖ£ÖÔ X Ûêú 0.877% ‘ÖÖê»Ö Ûêú ÃÖÖ£Ö 
†Ö‡ÃÖÖê™üÖê×®ÖÛú Æîü … X ÛúÖ †ÖÞÖ×¾ÖÛú ³ÖÖ¸ü ¯Ö׸üÛú×»ÖŸÖ Ûúßו֋ … 
 A 5 percent solution (by mass) of cane-sugar (M.W. 342) is isotonic with 0.877% 
solution of substance X. Find the molecular weight of X. 
 
13. ‹Ûú ¯ÖÏ£Ö´Ö ÛúÖê×™ü †×³Ö×ÛÎúµÖÖ Ûêú ×»ÖµÖê ¤ü¸ü ×ãָüÖÓÛú 60 s
–1 
Æîü … †×³ÖÛúÖ¸üÛú Ûêú ¯ÖÏÖ¸ü×´³ÖÛú ÃÖÖÓ¦üÞÖ ÛúÖê ‡ÃÖÛêú 1/10
 
ŸÖÛú ‘Ö™®Öêê ´Öë ×ÛúŸÖ®ÖÖ ÃÖ´ÖµÖ »ÖÝÖêÝÖÖ ? 
 The rate constant for a first order reaction is 60 s
–1
. How much time will it take to 
reduce the initial concentration of the reactant to its 1/10
th
 value ? 
56/1 5 [P.T.O. 
14. ×®Ö´®Ö ¯ÖÏÛÎú´ÖÖë Ûúß ¾µÖÖܵÖÖ Ûúßו֋ : 
 (i) ›üÖµÖ×»Ö×ÃÖÃÖ 
 (ii) ‡»ÖꌙÒüÖê±úÖê¸êü×ÃÖÃÖ 
 (iii) ×™üÞ›ü»Ö ¯ÖϳÖÖ¾Ö 
 Describe the following processes : 
 (i) Dialysis  
 (ii) Electrophoresis 
 (iii) Tyndall effect 
 
15. ×®Ö´®Ö Ûêú ˆ¢Ö¸ü ¤üßו֋ : 
 (i) ‹ê»Öã×´Ö×®ÖµÖ´Ö Ûêú ¬ÖÖŸÖãÛú´ÖÔ ´Öë ÛÎúÖ‡µÖÖê»ÖÖ‡™ü Ûúß ŒµÖÖ ³Öæ×´ÖÛúÖ ÆüÖêŸÖß Æîü ? 
 (ii) ³Ö•ÖÔ®Ö ×ÛÎúµÖÖ †Öî¸ü ×®ÖßÖÖ¯Ö®Ö ´Öë †ÓŸÖ¸ü Ûúßו֋ … 
 (iii) ‘ÛÎúÖê´Öîê™üÖêÝÖÏî±úß’ ¯Ö¤ü ÃÖê ŒµÖÖ ŸÖÖŸ¯ÖµÖÔ ÆüÖêŸÖÖ Æîü ? 
           †£Ö¾ÖÖ 
 »ÖÖêÆüÖ ²Ö®ÖÖ®Öê Ûêú ×»Ö‹ ²»ÖÖÙü ±ú®ÖìÃÖ Ûêú ×¾Ö׳֮®Ö ³ÖÖÝÖÖë ´Öë ÆüÖê®Öê ¾ÖÖ»Öß †×³Ö×ÛÎúµÖÖ‹Ñ ×»Ö×ÜÖ‹ …  
 Answer the following : 
 (i) What is the role of cryolite in the metallurgy of aluminium ? 
 (ii) Differentiate between roasting and calcination. 
 (iii) What is meant by the term ‘chromatography’ ? 
                                              OR 
 Write the reactions taking place in different zones of the blast furnace to obtain Iron.  
 
16. ‘†®ÖÖ®Öã¯ÖÖŸÖ®Ö’ ÃÖê ŒµÖÖ ŸÖÖŸ¯ÖµÖÔ ÆüÖêŸÖÖ Æîü ? •Ö»ÖßµÖ ×¾Ö»ÖµÖ®Ö ´Öë †®ÖÖ®Öã¯ÖÖŸÖ®Ö †×³Ö×ÛÎúµÖÖ†Öë ÛúÖ ‹Ûú ˆ¤üÖÆü¸üÞÖ ¤üßו֋ … 
 What is meant by ‘disproportionation’ ? Give one example of disproportionation 
reaction in aqueous solutions.