英皇_2006_mock_chem_I_ANS_Samuel

英皇_2006_mock_chem_...

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Prepared by Dr. Samuel Chong CHEMISTRY Paper 1 Marking Scheme Dr. Samuel Chong Dr. Samuel Chong 博士級名師 z 英皇教育首席化學科名師,課程以高質素高效率 見稱。 z 英皇教育唯一博士級 化學科名師。 z 香港大學化學系 博士及榮譽學士畢業。 z 具有多年大學科研經驗,為化學科專家 z 本學年已有數以千計同學報讀莊博士的課程,絕 對是信心保證。 z 學生成績超卓,極多報讀學生奪取 A,B C 成績 z 學生口碑絕讚,成績突飛猛進。 z 04 05 年應邀為學生褔利聯盟 (SWA) 於沙田大 會堂及灣仔會展舉行之會考及高考講座作化學 科主講嘉賓 z 具有多年補習經驗 ,對考試的趨勢瞭如指掌,並 迅速地教授學生答題絕技。
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© By Dr. Samuel Chong Chemistry Team 1 Marks 1. (a) (i) calcium carbonate (ii) gas bubbles are given off. (b) (i) Compound A – calcium oxide ; Gas B – carbon dioxide (ii) Brick-red colour (iii) Test the gas B with limewater which will turns milky. (c) calcium hydroxide It is used to neutralize the acidity of soil. 1 1 1,1 1 1 1 1 (8) 2. (a) There is strong covalent bond between oxygen atoms. There is weak van der Waals’ force between oxygen molecules (b)(i) Fractional distillation (ii) The liquefied gases is separated by fractionating column under different boiling points. (c) No, it is not a good conductor of electricity. It is because there is no mobile electrons or ions. 1 1 1 1 1 1 (6)
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© By Dr. Samuel Chong Chemistry Team 2 Marks 3. (a) Add both concentrated sulphuric acid and concentrated nitric acid to copper. Concentrated nitric acid gives reddish-brown gas while concentrated sulphuric acid does not. (b)
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英皇_2006_mock_chem_...

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