Which of the following is not true about potash alum?
- AIts empirical formula is $KAl(SO_4)_2 \cdot 12H_2O$
- BIts aqueous solution is basic
- CIt is used in dyeing industries
- DOn heating,it melts in its water of crystallization
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Similar Questions
Match the following substances in List-$I$ with their uses in List-$II$:
| List-$I$ (Substance) | List-$II$ (Use) |
| :--- | :--- |
| $(A)$ $Na_2O_2$ | $(I)$ Photoelectric cells |
| $(B)$ $D_2O$ | $(II)$ Antacid |
| $(C)$ $Cs$ | $(III)$ Oxidising agent |
| $(D)$ $Mg(OH)_2$ | $(IV)$ Moderator |
| List-$I$ (Substance) | List-$II$ (Use) |
| :--- | :--- |
| $(A)$ $Na_2O_2$ | $(I)$ Photoelectric cells |
| $(B)$ $D_2O$ | $(II)$ Antacid |
| $(C)$ $Cs$ | $(III)$ Oxidising agent |
| $(D)$ $Mg(OH)_2$ | $(IV)$ Moderator |
For a good quality cement,the ratio of lime to the total of the oxides of $Si$,$Al$ and $Fe$ should be as close as to :
DifficultJEE MAIN 2023
View SolutionWhich of the following does not dissolve in dil $H_2SO_4$?
Easy
View Solution$Al_4C_3$ is an ionic carbide,named as
Difficult
View SolutionThe initial setting of cement is primarily due to which of the following?
Medium
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