Which one of the following statements is incorrect?
- ACalamine and siderite are carbonates.
- BArgentite and cuprite are oxides.
- CZinc blende and pyrites are sulphides.
- DMalachite and azurite are ores of copper.
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What are the products formed when chlorine is passed through an aqueous hypo solution?
Match the following columns:
Column-$I$ Column-$II$ $A$. Halophiles $i$. Gram-negative bacteria $B$. Thermoacidophiles $ii$. Inhabit extremely salty areas $C$. Spirochetes $iii$. Responsible for methane production $D$. Firmicutes $iv$. Survive in acidic and high-temperature conditions $v$. Gram-positive bacteria
| Column-$I$ | Column-$II$ |
|---|---|
| $A$. Halophiles | $i$. Gram-negative bacteria |
| $B$. Thermoacidophiles | $ii$. Inhabit extremely salty areas |
| $C$. Spirochetes | $iii$. Responsible for methane production |
| $D$. Firmicutes | $iv$. Survive in acidic and high-temperature conditions |
| $v$. Gram-positive bacteria |
If $\tan \theta + \tan \left(\theta + \frac{\pi}{3}\right) + \tan \left(\theta + \frac{2\pi}{3}\right) = 3$,then which of the following is equal to $1$?
Which one of the following statements is incorrect?
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