EKLAVYA EDUCATION

Guess Paper – 2012 Class – XI Subject – CHEMISTRY                   Time allowed : 3hours                                                                                    Maximum marks : 70   General instructions 1.       All question are compulsory. 2.       Marks for each question are indicated against it. 3.       Questions number 1 to 8 are very short answer questions and carry 1 mark each. 4.       Questions number 9 to 18 are short answer questions and carry 2 marks each. 5.       Questions number 19 to 27 are also short answer questions and 3 marks each. 6.       Questions number 28 to 30 are long answer questions and carry 5 marks each. Q1. Calculate the molar mass of the HCl, H 2 SO 4      ?   (Given H=1 ,Cl=35.5 , o=16 ,S=32)                                                         1 Q2. Calculate the number of protons neutrons and electron in 35 Br 80 ?                                                        1 Q3. Define law of definite

CHEMICAL SCIENCES This Test Booklet will contain 145 (20 Part `A‟+50 Part `B+75 Part „C‟) Multiple Choice Questions (MCQs). Candidates will be required to answer 15 in part „A‟, 35 in Part „B‟ and 25 questions in Parts C respectively ( No. of question to attempt may vary from exam to exam). In case any candidate answers more than 15, 35 and 25 questions in Parts A, B and C respectively only first 15, 35 and 25 questions in Parts A, B and C respectively will be evaluated. Questions in Parts `A‟ and „B‟ carry two marks each and Part `C‟ questions carry four marks each. There will be negative marking @25% for each wrong answer. Below each question, four alternatives or responses are given. Only one of these alternatives is the „CORRECT‟ answer to the question. MODEL QUESTION PAPER PART A May be viewed under heading "General Science" PART B 21 . [CoCl 4 ] 2- shows a deep blue colour because of 1. metal to ligand charge transfer transition 2. ligand to