Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
According to the reactivity series of metals, which metal pair is found in native state?
Calcium and magnesium
Calcium and aluminium
Gold and platinum
Sodium and potassium
Gold and platinum
Metals that are very low in the reactivity series do not readily react with oxygen, moisture, or other environmental agents, allowing them to exist in nature in their pure or uncombined form. Gold (Au) and platinum (Pt) are noble metals located at the bottom of the reactivity series, which is why they are found in their native state.
Metals that are very low in the reactivity series do not readily react with oxygen, moisture, or other environmental agents, allowing them to exist in nature in their pure or uncombined form. Gold (Au) and platinum (Pt) are noble metals located at the bottom of the reactivity series, which is why they are found in their native state.
Think of highly reactive metals like social butterflies that constantly make new friends (bond with other elements), while noble metals like gold are 'introverts' that prefer to stay by themselves and don't interact with the chemicals around them.
Please Stop Calling Me A Careless Zebra Instead Try Learning How Copper Saves Gold (Potassium, Sodium, Calcium, Magnesium, Aluminum, Carbon, Zinc, Iron, Tin, Lead, Hydrogen, Copper, Silver, Gold).
Au тАФ Symbol for Gold
Pt тАФ Symbol for Platinum
The reactivity series is a list of metals arranged in descending order of their chemical reactivity. Metals at the top (like potassium and sodium) are highly reactive and are always found in combined forms (as oxides, carbonates, or sulfides). Metals at the bottom (like silver, gold, and platinum) have very low electrode potentials and are chemically inert, meaning they resist oxidation and remain as pure elements in the Earth's crust.
Native state refers to metals found in nature in an uncombined elemental form.
Gold and Platinum are highly resistant to corrosion and oxidation.
The position in the reactivity series dictates the method of extraction (electrolysis for high reactivity, reduction for medium, and native state for low reactivity).
Highly reactive metals like Sodium and Calcium are never found in native state due to their tendency to react with air and water.
Native metals can be extracted with minimal chemical processing compared to ores.
Noble metals are rare, making them highly expensive and valuable.
Gold is used for jewelry and electronic components due to its corrosion resistance.
Platinum is used as a catalyst in industrial chemical reactions and automotive converters.
The reactivity series is based on the standard reduction potential of metals in an aqueous solution.
Option A (Calcium and Magnesium) and Option D (Sodium and Potassium) are highly reactive and found as ores. Option B (Calcium and Aluminum) are also reactive.
C is correct тАФ Gold and platinum are placed at the bottom of the reactivity series, making them noble metals that occur in their native (uncombined) state.
Remember: The lower the metal in the reactivity series, the easier it is to extract, eventually reaching native state metals like gold (Au) and silver (Ag).
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants