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เข้าร่วมเมื่อ 26 พ.ค. 2024
DSE Chem 2019 Paper 1B (LQ) Q10 (Section 4)
By-Year Past Paper Solution:
(Please scroll down to find By-Topic Past Paper Solution)
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-------------------
By-Topic Past Paper Solution:
Section 1 Planet Earth
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Section 2 Microscopic World (I)
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[LQ] th-cam.com/play/PLZUOr2_ufrf9BtwSV8c0Elik1hiiS4B4d.html&feature=shared
Section 3 Metals
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[LQ] th-cam.com/play/PLZUOr2_ufrf_GlUKVO39-zza82I6RqgS3.html&feature=shared
Section 4 Acids and Bases
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[LQ] th-cam.com/play/PLZUOr2_ufrf8ImBe61xBOXwu-wt1BE42c.html&feature=shared
Section 5 Fossil Fuels and Carbon Compounds
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[LQ] th-cam.com/play/PLZUOr2_ufrf-C4nG-Hlqeq0Fm6zHAUVXb.html&feature=shared
Section 6 Microscopic World (II)
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[LQ] th-cam.com/play/PLZUOr2_ufrf8PpCcMIU7fBY8PngGkGyIK.html&feature=shared
Section 7 Redox Reactions, Chemical Cells and Electrolysis
[MC] th-cam.com/play/PLZUOr2_ufrf82UstylX4yj-rR6ZaFPdc-.html&feature=shared
[LQ] th-cam.com/play/PLZUOr2_ufrf8Y_h8fYdeLYMTu0qMHSKVY.html&feature=shared
Section 8 Chemical Reactions and Energy
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[LQ] th-cam.com/play/PLZUOr2_ufrf_MLWGu108sBkAgrduXjyyk.html&feature=shared
Section 9 Rate of Reaction
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[LQ] th-cam.com/play/PLZUOr2_ufrf8fZDwQIKcOduFaSc8kztsg.html&feature=shared
Section 10 Chemical Equilibrium
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[LQ] th-cam.com/play/PLZUOr2_ufrf-rDIEfmz9OIzcljtbmK3MS.html&feature=shared
Section 11 Chemistry of Carbon Compounds
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[LQ] th-cam.com/play/PLZUOr2_ufrf9upTRf8I6SlZ7Tn5BM_NZc.html&feature=shared
Section 12 Patterns in the Chemical World
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[LQ] th-cam.com/play/PLZUOr2_ufrf9KgMyU4gnIfZzyzahO0_Rz.html&feature=shared
Section 13 Industrial Chemistry
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Section 15 Analytical Chemistry
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(Please scroll down to find By-Topic Past Paper Solution)
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-------------------
By-Topic Past Paper Solution:
Section 1 Planet Earth
[MC] th-cam.com/play/PLZUOr2_ufrf_ZyM_9twEXFPYseQ_YkVce.html&feature=shared
[LQ] th-cam.com/play/PLZUOr2_ufrf9KZMYvtjXxt3CY6AVf3Yn2.html&feature=shared
Section 2 Microscopic World (I)
[MC] th-cam.com/play/PLZUOr2_ufrf9i4V0PphEtfsga4IHdJ-Xw.html&feature=shared
[LQ] th-cam.com/play/PLZUOr2_ufrf9BtwSV8c0Elik1hiiS4B4d.html&feature=shared
Section 3 Metals
[MC] th-cam.com/play/PLZUOr2_ufrf-KJJO4QtFH1SilSwAqcbtq.html&feature=shared
[LQ] th-cam.com/play/PLZUOr2_ufrf_GlUKVO39-zza82I6RqgS3.html&feature=shared
Section 4 Acids and Bases
[MC] th-cam.com/play/PLZUOr2_ufrf9KujuRP-Uh_-ghrQSu55d8.html&feature=shared
[LQ] th-cam.com/play/PLZUOr2_ufrf8ImBe61xBOXwu-wt1BE42c.html&feature=shared
Section 5 Fossil Fuels and Carbon Compounds
[MC] th-cam.com/play/PLZUOr2_ufrf_4CQK5nsHWXokblEr1Tsq8.html&feature=shared
[LQ] th-cam.com/play/PLZUOr2_ufrf-C4nG-Hlqeq0Fm6zHAUVXb.html&feature=shared
Section 6 Microscopic World (II)
[MC] th-cam.com/play/PLZUOr2_ufrf_Hd6pvbFuCBjV_8HoPJsX2.html&feature=shared
[LQ] th-cam.com/play/PLZUOr2_ufrf8PpCcMIU7fBY8PngGkGyIK.html&feature=shared
Section 7 Redox Reactions, Chemical Cells and Electrolysis
[MC] th-cam.com/play/PLZUOr2_ufrf82UstylX4yj-rR6ZaFPdc-.html&feature=shared
[LQ] th-cam.com/play/PLZUOr2_ufrf8Y_h8fYdeLYMTu0qMHSKVY.html&feature=shared
Section 8 Chemical Reactions and Energy
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Section 9 Rate of Reaction
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[LQ] th-cam.com/play/PLZUOr2_ufrf8fZDwQIKcOduFaSc8kztsg.html&feature=shared
Section 10 Chemical Equilibrium
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Section 11 Chemistry of Carbon Compounds
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Section 12 Patterns in the Chemical World
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Section 13 Industrial Chemistry
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Section 15 Analytical Chemistry
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DSE Chem 2019 Paper 1B (LQ) Q3 (Section 5)
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想請問下aldehyde唔係都cut到43咩ch2cho+點解話冇
stability問題 aldehyde喺MS淨係form到CHO+ 其他(e.g. CH2CHO+/CH2CH2CHO+)太唔stable 唔太會存在喺MS
但係b唔係cl 由+5 變左+7 咩
In option B, the oxidation number of Cl - increases from +5 (in KClO3) to +7 (in KClO4), and - decreases from +5 (in KClO3) to -1 (in KCl) This is known as disproportionation reaction, in which a species (KClO3) is reduced (to KCl) and oxidized (to KClO4) simultaneously (i.e., at the same time).
any LQ???
今個月內會開始拍
@@DCExplained-1984 謝謝您努力!