Tiêu đề 27 Chemical Science Paper-III.pdf ✅

Test Paper : III Test Subject : CHEMICAL SCIENCE Test Subject Code : K-2714 Test Booklet Serial No. : _______________________ OMR Sheet No. : _________________________________ Roll No. (Figures as per admission card) Name & Signature of Invigilator/s Signature: ____________________________________ Signature: ___________________________________ Name : ____________________________________ Name : ___________________________________ Paper : III Subject : CHEMICAL SCIENCE Time : 2 Hours 30 Minutes Maximum Marks : 150 Number of Pages in this Booklet : 16 Number of Questions in this Booklet : 75 K-2714 1 /P.T.O. Instructions for the Candidates 1. Write your roll number in the space provided on the top of this page. 2. This paper consists of seventy five multiple-choice type of questions. 3. At the commencement of examination, the question booklet will be given to you. In the first 5 minutes, you are requested to open the booklet and compulsorily examine it as below : (i) To have access to the Question Booklet, tear off the paper seal on the edge of this cover page. Do not accept a booklet without sticker-seal and do not accept an open booklet. (ii) Tally the number of pages and number of questions in the booklet with the information printed on the cover page. Faulty booklets due to pages/questions missing or duplicate or not in serial order or any other discrepancy should be got replaced immediately by a correct booklet from the invigilator within the period of 5 minutes. Afterwards, neither the Question Booklet will be replaced nor any extra time will be given. 4. Each item has four alternative responses marked (A), (B), (C) and (D). You have to darken the oval as indicated below on the correct response against each item. Example :A B C D where (C) is the correct response. 5. Your responses to the question of Paper III are to be indicated in the OMR Sheet kept inside the Booklet. If you mark at any place other than in the ovals in OMR Answer Sheet, it will not be evaluated. 6. Read the instructions given in OMR carefully. 7. Rough Work is to be done in the end of this booklet. 8. If you write your name or put any mark on any part of the OMR Answer Sheet, except for the space allotted for the relevant entries, which may disclose your identity, you will render yourself liable to disqualification. 9. You have to return the test OMR Answer Sheet to the invigilators at the end of the examination compulsorily and must NOT carry it with you outside the Examination Hall. 10. You can take away question booklet and carbon copy of OMR Answer Sheet soon after the examination. 11. Use only Blue/Black Ball point pen. 12. Use of any calculator or log table etc., is prohibited. 13. There is no negative marks for incorrect answers. 1. ! ! " # $% 2. &'( !) *+ ,-./01 2 '3 "4 "4 5 % 3. $ ( 6 7' 8 9 '3 " ( " 4 : 74 % 5- ;4 ( 1" 1 ( 1 ( :7 7 < $ =6 ( 7 % (i) '3 " ( 4 ' 37 (73 : 9) ( > ? )" $# $% (@, A '3 " ( B ( $ C 5%1 ( B ( " $ C 5% (ii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
Paper III 2 K-2714 Total Number of Pages : 16 CHEMICAL SCIENCE PAPER – III Note : This paper contains seventy-five (75) objective type questions. Each question carries two (2) marks. All questions are compulsory. 1. Which one of the following is incorrect with respect to the property indicated ? (A) Electronegativity : F2 > Cl2 > Br 2 (B) Electron affinity : Cl2 > F 2 > Br 2 (C) Oxidizing power : F2 > Cl2 > Br 2 (D) Bond energy : F2 > Cl2 > Br 2 2. Which one of the following sets indicate the correct variation in electronegativities ? (A) F > N < O > C (B) F > N > O > C (C) F < N < O < C (D) F < O > N > C 3. Nitric oxide has the electronic configuration (K electrons) 1 x, y 2 pz 4 x, y 2 s 2 s ∗ ∗ σ σ π σ π . Which one of the following statements is correct ? (A) on ionization to form NO+ , its bond order decreases and bond length increases (B) on ionization to form NO+ , its bond order and bond length decrease (C) on ionization to form NO+ , its bond order and bond length increase (D) on ionization to form NO+ , its bond order increases and bond length decreases 4. The states of hybridization of nitrogen in the species + − 2 NO2 NO , and + NH4 are respectively (A) sp, sp3 , sp2 (B) sp, sp2 , sp3 (C) sp2 , sp, sp3 (D) sp2 , sp3 , sp 5. Super acid which is known as magic acid is a solution of (A) HF-SbF5 (B) HSO3 F-SbF5 (C) HSO3 F-Nb (SO3 F)5 (D) HSO3 F-Ta (SO3 F)5 6. Two hypothetical acids HA and HB have the dissociation constants 1 × 10–3 and 1 × 10–5 respectively in water. How many times HA is stronger than HB ? (A) 10 times (B) 100 times (C) 1000 times (D) Not definite 7. The lowest energy visible spectral band of an octahedral Nickel (II) complex is due to the transition (A) T2g T1g 3 ←⎯⎯ 3 (B) A2g T1g 3 ←⎯⎯ 3 (C) T2g A2g 3 ←⎯⎯ 3 (D) T1g A2g 3 ←⎯⎯ 3