The oxide of potassium that does not exist is
- A$K_{2}O$
- B$KO_{2}$
- C$K_{2}O_{2}$
- D$K_{2}O_{3}$
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Valency electrons in alkali metals are
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View SolutionMatch List-$I$ with List-$II$.
List-$I$ (Alkali Metal) List-$II$ (Emission Wavelength in $nm$) $A$. $Li$ $I$. $589.2$ $B$. $Na$ $II$. $455.5$ $C$. $Rb$ $III$. $670.8$ $D$. $Cs$ $IV$. $780.0$
Choose the correct answer from the options given below:
| List-$I$ (Alkali Metal) | List-$II$ (Emission Wavelength in $nm$) |
| $A$. $Li$ | $I$. $589.2$ |
| $B$. $Na$ | $II$. $455.5$ |
| $C$. $Rb$ | $III$. $670.8$ |
| $D$. $Cs$ | $IV$. $780.0$ |
Choose the correct answer from the options given below:
Magnesium burns in an atmosphere of $CO_2$ because ...
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View Solution$Ca + 2C$ $\rightarrow CaC_2$ $\xrightarrow{N_2, \Delta} A$
Compound $(A)$ is used as a/an:
Compound $(A)$ is used as a/an:
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View SolutionThermite is a mixture of
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