Group VII Properties
Muhtasari
The Group VII halogens are a striking family of coloured, reactive non-metals: a pale yellow-green gas, a red-brown liquid and a grey-black solid, all sitting in the same column of the periodic table. They are the mirror image of the Group I metals, with a reactivity that falls, rather than rises, as you go down the group.
In this lesson you will learn the appearance of chlorine, bromine and iodine at room temperature, the trends in density and reactivity, and the displacement reactions that prove the order of reactivity. More than that, you will understand why the trend runs the way it does, so you can predict how an unfamiliar halogen will behave and justify it like an examiner.
Malengo
- Describe the Group VII halogens, chlorine, bromine and iodine, as diatomic non-metals with general trends down the group, limited to: (a) increasing density (b) decreasing reactivity.
- State the appearance of the halogens at r.t.p. as: (a) chlorine, a pale yellow-green gas (b) bromine, a red-brown liquid (c) iodine, a grey-black solid.
- Describe and explain the displacement reactions of halogens with other halide ions.
- Predict the properties of other elements in Group VII, given information about the elements.
Maelezo ya Somo
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Group VII Properties. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- What is the appearance of bromine at room temperature and pressure? A. Pale yellow-green gas B. Red-brown liquid C. Grey-black solid D. Colourless gas Answer: B
- Going down Group VII, the reactivity: A. Increases B. Decreases C. Stays the same D. Becomes zero Answer: B
- Which halogen will displace iodine from potassium iodide solution? A. Iodine itself B. Astatine C. Chlorine D. None of them Answer: C
- Why does iodine not displace chlorine from sodium chloride solution? A. Iodine is a solid B. Iodine is less reactive than chlorine C. Chlorine is a gas D. They do not dissolve Answer: B
- Going down Group VII, the density: A. Increases B. Decreases C. Stays the same D. Becomes negative Answer: A
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Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
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Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Group VII Properties? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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