Naveen studied the characteristics of three metals X- Y and Z- when exposed to moist air- Following observations were made- beginmatrix Metal - Colour change Y - Brownish red VZ - No change lendmatrix Identify the probable metals Naveen had-A- beginarray 1111- X - Y - Z- Cu - Fe - Ptlend array B- beginarray 1111- X - Y - Z - Fe - Ag - Aulend array C- beginarray 1111 - X - Y - Z- Fe - K - Aglend array D- V beginarray 1111- X - Y - Z- Na - Ca - Auendarray

The correct option is A [ amp; X amp; Y amp; Z; 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

Displacement Reaction

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.

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

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

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

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

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Solution

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

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

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Similar questions

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.

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.

Q. Nutrients are supplied to plants by various sources. Identify 'X', 'Y', and 'Z' and choose the correct option.

\begin{matrix} Source & Nutrient X & Oxygen Water & Y Z & Nitrogen \end{matrix}

Q. If x, y, z are different from zero and

|\begin{matrix} 1 + x & 1 & 1 \\ 1 & 1 + y & 1 \\ 1 & 1 & 1 + z \end{matrix}| = 0

, then the value of x⁻¹ + y⁻¹ + z⁻¹ is

(a) xyz
(b) x⁻¹ y⁻¹ z⁻¹
(c) − x − y − z
(d) − 1

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

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

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