Reactivity Series
Muhtasari
Some metals react violently the moment they touch water. Others sit in the ground for centuries without corroding. Arranging metals from the most reactive to the least reactive gives the reactivity series - a ranking that explains everything from how metals are extracted to why ships are fitted with zinc blocks.
In this lesson you will learn the order of the reactivity series, how it is deduced from reactions with water and acids, and how it connects to displacement reactions, rusting, and rust prevention.
Malengo
- Understand how metals can be arranged in a reactivity series based on their reactions with water, and dilute hydrochloric or sulfuric acid
- Know the order of reactivity of these metals: potassium, sodium, lithium, calcium, magnesium, aluminium, zinc, iron, copper, silver, gold
- Know the conditions under which iron rusts
- Understand how the rusting of iron may be prevented by barrier methods and galvanising
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Reactivity Series. 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.
- Which metal is the most reactive? A) Iron B) Copper C) Potassium D) Zinc Answer: C
- What are the two conditions needed for iron to rust? A) Water and carbon dioxide B) Water and oxygen C) Oxygen and nitrogen D) Water and acid Answer: B
- In a displacement reaction, a more reactive metal: A) Dissolves in the solution B) Replaces a less reactive metal from its compound C) Forms a gas D) Changes colour Answer: B
- Galvanising involves coating iron with: A) Copper B) Tin C) Zinc D) Aluminium Answer: C
- Which metal does NOT react with dilute hydrochloric acid? A) Magnesium B) Zinc C) Iron D) Copper Answer: D
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
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 Reactivity Series? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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