The incorrect statement is :
Solution
Bronze contains 75 – 90% Cu and 10 – 25% Sn
Cast iron is used to make wraugut iron.
<br><br>German silver contains 56% Cu, 24% Zn and
20% Ni.
<br><br>Brass contains 60% Cu and 40% Zn.
<br><br>Note :<br><br><style type="text/css">
.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break:normal;}
.tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;}
.tg .tg-baqh{text-align:center;vertical-align:top}
.tg .tg-0lax{text-align:left;vertical-align:top}
</style>
<table class="tg">
<thead>
<tr>
<th class="tg-baqh"><b>Alloys</b></th>
<th class="tg-0lax"><b>Composition</b></th>
</tr>
</thead>
<tbody>
<tr>
<td class="tg-baqh">Brass</td>
<td class="tg-0lax">60% Cu + 40% Zn</td>
</tr>
<tr>
<td class="tg-baqh">Bronze</td>
<td class="tg-0lax">75-90% Cu + 10-25% Sn</td>
</tr>
<tr>
<td class="tg-baqh">Gun-metal</td>
<td class="tg-0lax">90% Cu + 8% Sn + 2% Zn</td>
</tr>
<tr>
<td class="tg-baqh">Aluminium bronze</td>
<td class="tg-0lax">90% Cu + 10% Al</td>
</tr>
<tr>
<td class="tg-baqh">Monel metal</td>
<td class="tg-0lax">30% Cu + 67% Ni + 3% (Fe + Mn)</td>
</tr>
<tr>
<td class="tg-baqh">German Silver</td>
<td class="tg-0lax">56% Cu + 24% Zn + 20% Ni</td>
</tr>
<tr>
<td class="tg-baqh">Manganin</td>
<td class="tg-0lax">78-86% Cu + 13-18% Mn + 1-4% Ni</td>
</tr>
<tr>
<td class="tg-baqh">Bell metal</td>
<td class="tg-0lax">80% Cu + 20% Sn</td>
</tr>
<tr>
<td class="tg-baqh">Constantan</td>
<td class="tg-0lax">60% Cu + 40% Ni</td>
</tr>
</tbody>
</table>
About this question
Subject: Chemistry · Chapter: p-Block Elements · Topic: Group 13: Boron Family
This question is part of PrepWiser's free JEE Main question bank. 300 more solved questions on p-Block Elements are available — start with the harder ones if your accuracy is >70%.