MCQ
The molecular formula of felspar is
- ✓${K_2}O\,.\,A{l_2}{O_3}.\,6Si{O_2}$
- B${K_2}O\,.\,3A{l_2}{O_3}.\,6Si{O_2}$
- C$N{a_3}Al{F_6}$
- D$CaS{O_4}.\,2{H_2}O$
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| List $I$ (Amines) | List $II$ $\left( pK _{ b }\right)$ |
| $A$ Aniline | $I$ $3.25$ |
| $B$ Ethanamine | $II$ $3.00$ |
| $C$ $N-$Ethylethanamine | $III$ $9.38$ |
| $D$ $N, N-$Diethylethanamine | $IV$ $3.29$ |
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