What happened to the copper ions? Oxidation/Reduction?
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On adding a piece of aluminium foil to blue coloured copper sulphate solution, copper will be deposited on aluminium foil. Then the solution
B) Becomes colourless
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Why did symbol of copper taken as ‘Cu’ ? A) Latin name of copper is cuprum.
A) Latin name of copper is cuprum.
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The iron nail dipped in Copper Sulphate solution becomes brown and the blue colour of the Copper Sulphate solution fades.
D) Displacement
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i. Write a balanced reaction for the extraction of copper from copper(I) sulphide. ii. Which species undergoes an increase in the oxidation state?
i. Cu2S + O2 → 2Cu + SO2 ii. Sulphur undergoes an increase in the oxidation state from -2 (in Cu2S) to +4 (in SO2). iii. Copper accepts one electron and undergoes a decrease...
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A chemical reaction in which oxidation and reduction processes takes place simultaneously is known as ………… reaction.
Correct option is: (A) redox A chemical reaction in which oxidation and reduction processes takes place simultaneously is known as redox reaction
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A chemical reaction in which oxidation and reduction processes takes place simultaneously is known as ………… reaction.
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ऑक्सीकरण-अपचयन (oxidation-reduction) अभिक्रिया में कौन-से एन्जाइम का सम्बन्ध इलेक्ट्रॉन के स्थानान्तरण से होता है?
Correct Answer - डीहाइड्रोजिनेसेस,
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Copper crystallises into a fee lattice. Its edge length is `3.62 xx 10^(-8)` cm. Calculate the density of copper (atomic mass of Cu=63-5 u, `N_A= 6-02
Correct Answer - `8.9 "g cm"^(-3)` For fcc, `r=a/(2sqrt2) or a=2sqrt2r=2xx1.414xx128` pm =362 pm `rho=(ZxxM)/(a^3xxN_0)=(4xx63.5 "g mol"^(-1))/((362xx10^(-10)cm)^3xx6.02xx10^23 mol^(-1))=8.9 "g cm"^(-3)` Alternatively, `rho="Mass of unit cell "/"Volume of unit cell "=(4xx(63.5 "g...
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Statement-1:Decomposition of `H_(2)O_(2)` is a dispoportionation reaction. Statement-2:`H_(2)O_(2)` undergoes simultaneous oxidation and reduction rea
(a) Statement-2 is the correct explantion for statement-1
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Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ors of copper include chalcanthite `(Cu
Correct Answer - B `2CuFeS_(2)+O_(2)rarrCu_(2)S +SO_(2)uarr +2FeS` `2FeS+3O_(*2)rarr 2FeO+2SO_(2)uarr` `2Cu_(2)S+3O_(2)rarr2Cu_(2)O+2SO_(2)uarr`
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