(D) Pitchblende,also known as uraninite,is a radioactive,uranium-rich mineral ore with the chemical composition $UO_2$. It is the primary ore of urani

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(D) Pitchblende,also known as uraninite,is a radioactive,uranium-rich mineral ore with the chemical composition $UO_2$. It is the primary ore of uranium $(U)$. Additionally,it is historically significant as the source from which Marie Curie isolated radium $(Ra)$. Therefore,pitchblende is a source of both uranium and radium.

Class 12 Chemistry General Principles and Processes of Isolation of Elements Occurrence

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The ore pitchblende is the main source of

A
$Ra$
B
$Ce$
C
$Th$
D
$Ra$ and $U$

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Class 12 Questions

Class 12

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Chapter

General Principles and Processes of Isolation of Elements

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Occurrence

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Indicate the mineral from which copper is manufactured.

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Naturally occurring substances from which a metal can be profitably (or economically) extracted are called

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Define the following terms:
$(i)$. Minerals
$(ii)$. Ores
$(iii)$. Metallurgy
$(iv)$. Gangue

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Match the ores (Column $A$) with the metals (Column $B$):

Column $A$: Ores Column $B$: Metals

$I$. Siderite $a$. Zinc

$II$. Kaolinite $b$. Copper

$III$. Malachite $c$. Iron

$IV$. Calamine $d$. Aluminium

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Column $A$: Ores	Column $B$: Metals
$I$. Siderite	$a$. Zinc
$II$. Kaolinite	$b$. Copper
$III$. Malachite	$c$. Iron
$IV$. Calamine	$d$. Aluminium

The ore pitchblende is the main source of

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Indicate the mineral from which copper is manufactured.

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Define the following terms:$(i)$. Minerals$(ii)$. Ores$(iii)$. Metallurgy$(iv)$. Gangue

Match the ores (Column $A$) with the metals (Column $B$): Column $A$: Ores Column $B$: Metals $I$. Siderite $a$. Zinc $II$. Kaolinite $b$. Copper $III$. Malachite $c$. Iron $IV$. Calamine $d$. Aluminium

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Exam Paper Generator

Online Exam Module

Define the following terms:
$(i)$. Minerals
$(ii)$. Ores
$(iii)$. Metallurgy
$(iv)$. Gangue

Match the ores (Column $A$) with the metals (Column $B$):

Column $A$: Ores Column $B$: Metals

$I$. Siderite $a$. Zinc

$II$. Kaolinite $b$. Copper

$III$. Malachite $c$. Iron

$IV$. Calamine $d$. Aluminium