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Ion Electron Method

During the fo...

Question

During the formation of $N a C l$ , element $X$ is oxidised and element $Y$ is reduced. Then elements $X$ and $Y$ are respectively :

A

N a

,

C l_{2}

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B

N a

,

C l

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C

N a^{+}

,

C l^{-}

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D

C l

,

N a

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Solution

The correct option is B $N a$ , $C l$
Characteristics of a Sodium Chloride. Sodium chloride is formed when sodium atoms interact with chlorine atoms. When this occurs, sodium will donate an electron (which is a negatively-charged particle) to chlorine. This makes sodium slightly positive and chlorine slightly negative. Thus sodium is reduced in this process as it donates the electron and chlorine is oxidised as it gains the electron.

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Q. What type of crystal defect is indicated in the diagram below?

$N a^{+}$	$C l^{-}$	$N a^{+}$	$C l^{-}$	$N a^{+}$	$C l^{-}$
$C l^{-}$		$C l^{-}$	$N a^{+}$		$N a^{+}$
$N a^{+}$	$C l^{-}$		$C l^{-}$	$N a^{+}$	$C l^{-}$
$C l^{-}$	$N a^{+}$	$C l^{-}$	$N a^{+}$		$N a^{+}$

Q. What type of crystal defects is indicated in the diagram given below?

\begin{matrix} N a^{+} & C l^{-} & N a^{+} & C l^{-} & N a^{+} & C l^{-} C l^{-} & □ & C l^{-} & N a^{+} & □ & N a^{+} N a^{+} & C l^{-} & □ & N a^{+} & C l^{-} & C l^{-} C l^{-} & N a^{+} & C l^{-} & N a^{+} & □ & N a^{+} \end{matrix}

Question 17
Arrange the following elements in the order of their decreasing metallic character
Na, Si, Cl, Mg, Al

(a) Cl > Si >Al > Mg >Na
(b) Na >Mg >Al >Si > Cl
(c) Na > Al > Mg > Cl > Si
(d) Al > Na> Si > Ca> Mg

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