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HIMACHAL PRADESH MAR 2008 : Chemistry

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CHEMISTRY Time allowed : 3 Hours Maximum Marks : 70 General Instructions :1. Candidates are required to give their answers in their own words as far as practicable. 2. Marks allotted to each question are indicated against it. Special instructions :1. You must write question paper series in the circle at top left side of title page of your answer sheet. 2. Do not leave blank pages in your answer book. 3. All the questions are compulsory. Internal choices have been given in some questions. 4. Question no. 1 to 7 are multiple choice type question (M.C.Q.). Choose one correct answer among four options. 5. Questions no. 8 to 10 are very short answer type questions carrying one mark each. Answer these in about one sentence or one word. 6. Questions No. 11 to 16 are short answer type question carrying 2 (two) marks each. Answer these in about 30 words each. 7. Questions no. 17 to 27 are short answer type questions carrying 3 (three) marks each. Answer these questions in about 40 words. 8. Questions no. 28 to 30 are long type questions of 5 (five) marks. 9. Use log tables if necessary. Calculator is not allowed. Q1. Q2. Q3. Q4. Q5. Q6. Q7. Which element is having the highest electro-affinity : (a) O (b) cl (c) F (d) N How many no. of -covalent bonds are present in single molecule of ethyne. (a) 1 (b) 2 (c) 3 (d) 4 The correct electronic configuration of chromium atom (Cr.) is : (b) [Ar]3d4s2 (c) [Ar]3d64s (d) (a) [Ar]3d54s1 1 [Ar]4d54s1 Which substance having the highest entropy. (a) Water (b) Ice (c) 1 1 Air (d) H2 gas 1 NH2 (d) NH3 1 1 Conjugate acid of NH2 (a) NH2OH (b) + NH4 (c) Oxidation state of Fe in Fe3O4 is : (a) +2 (b) +3 (c) + 8 3 (d) + 2 3 1 The least abundant isotope of hydrogen is : (a) Chemistry 1 H 1 (b) 2 1D (c) 45 3 1 T (d) both a and b 1 +1

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Additional Info : Model Question Papers Of Plus One Examination March 2008 Chemistry
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