Naveen studied the characteristics of three metals X- Y and Z- when exposed to moist air- Following observations were made- beginmatrix Metal - Colour change 1 X - Green coating Y - Brownish V Z - No change lendmatrix Identify the probable metals Naveen had-A- beginarray 1111- X - Y - Za - Cu - Fe - Ptlend array B- beginarray 1111- X - Y - Zb - Fe - Ag - Aulend array C- beginarray 1111 - X - Y - Zc - Fe - K - Aglend array D- Vheginarray 1111 - X - Y - Z d - Na - Ca - Au lendarray

The correct option is A [ amp; X amp; Y amp; Z; a) amp; Cu amp; Fe amp; Pt ] X – Cu, Y – Fe, Z – Pt. Copper and iron get corroded when exposed ...

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Standard VIII

Chemistry

Basic Oxides of Metals

Naveen studie...

Question

Naveen studied the characteristics of three metals X, Y and Z, when exposed to moist air. Following observations were made:

$\begin{matrix} M e t a l & C o l o u r c h a n g e X & G r e e n c o a t i n g Y & B r o w n i s h r e d Z & N o c h a n g e \end{matrix}$

Identify the probable metals Naveen had.

$\begin{matrix} X & Y & Z a) & C u & F e & P t \end{matrix}$

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$\begin{matrix} X & Y & Z b) & F e & A g & A u \end{matrix}$

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$\begin{matrix} X & Y & Z c) & F e & K & A g \end{matrix}$

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$\begin{matrix} X & Y & Z d) & N a & C a & A u \end{matrix}$

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Solution

The correct option is A
$\begin{matrix} X & Y & Z a) & C u & F e & P t \end{matrix}$

X – Cu, Y – Fe, Z – Pt. Copper and iron get corroded when exposed to air and moisture, but not platinum. Cu and Fe are more reactive than Pt.

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Similar questions

Q. Naveen studied the characteristics of three metals X, Y and Z, when exposed to moist air. Following observations were made:

\begin{matrix} M e t a l & C o l o u r c h a n g e X & G r e e n c o a t i n g Y & B r o w n i s h r e d Z & N o c h a n g e \end{matrix}

Identify the probable metals Naveen had.

Naveen studied the characteristics of three metals X, Y and Z, when exposed to moist air. Following observations were made:

$\begin{matrix} M e t a l & C o l o u r c h a n g e X & G r e e n c o a t i n g Y & B r o w n i s h r e d Z & N o c h a n g e \end{matrix}$

Identify the probable metals Naveen had.

Q. Naveen studied the characteristics of three metals X, Y and Z, when exposed to moist air. Following observations were made:

\begin{matrix} M e t a l & C o l o u r c h a n g e X & G r e e n c o a t i n g Y & B r o w n i s h r e d Z & N o c h a n g e \end{matrix}

Identify the probable metals Naveen had.

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\begin{matrix} Column I & Column II W & No layer X & Greenish layer Y & Black layer Z & Reddish-brown layer \end{matrix}

Identify W, X, Y, and Z.

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Naveen studied the characteristics of three metals X, Y and Z, when exposed to moist air. Following observations were made: MetalColour changeXGreen coatingYBrownish redZNo change Identify the probable metals Naveen had.

The correct option is A XYZa)CuFePt X – Cu, Y – Fe, Z – Pt. Copper and iron get corroded when exposed to air and moisture, but not platinum. Cu and Fe are more reactive than Pt.

The correct option is A
$\begin{matrix} X & Y & Z a) & C u & F e & P t \end{matrix}$

X – Cu, Y – Fe, Z – Pt. Copper and iron get corroded when exposed to air and moisture, but not platinum. Cu and Fe are more reactive than Pt.