Which of the following is a mineral of sulfur?

  • A
    Galena
  • B
    Silica
  • C
    Horn silver
  • D
    Siderite

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$NH_{3}$ is used in the preparation of nitric acid by $.....$ process.

Make correct pairs from the below-mentioned $X$ and $Y$:
$X$$Y$
$1.$ Dehydrating agent$p.$ Sulphur dioxide gas
$2.$ In preparation of firecrackers$q.$ Concentrated sulphuric acid
$3.$ Weak bleaching agent$r.$ Dihydrogen gas
$4.$ Lightest gas$s.$ Sulphur

Write the chemical equation for the reaction taking place when steam is passed over hot aluminium.

Two ores $A$ and $B$ were taken. On heating, ore $A$ gives $CO_2$, whereas ore $B$ gives $SO_2$. What steps will you take to convert them into metals?

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Which metal does not react even with hot water or steam?

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