1984

JEE Main 2015 Questions › Inorganic Chemistry questions › 1984

Zinc copper couple cna be used as a reducing agent is obtained by
a)mixing zinc dust with copper gauze
b)zinc coated with copper
c)copper coated with zinc
d)zinc and copper wires welded together

Plz tell me the concept behind it

#Chemistry #Inorganic Chemistry

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Asish Mahapatra ·2010-03-14 06:14:29

(a)

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eureka123 ·2010-03-14 10:30:58

u r rite....but concept plz....i know it cnat be b,c

but why not d ???

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Arshad ~Died~ ·2010-03-14 12:00:00

i think its just because of the fact that zinc dust goes into the holes of the copper gauze...not sure...

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aieeee ·2010-03-14 12:02:35

Actually , if zinc and copper wires are welded together , product would be a type of alloy , with less reactivity than actual metals.

but , if powdered Zn is used, its reactivity is more ; as metals are more reactive in powdered form. Copper gauzes are provided to seal the reducing agent from rusting.

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eureka123 ·2010-03-14 21:54:11

thanks the genius "aieeee" [1]

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Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

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° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω

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1984

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