Question

 

The general formula of an alum is 

where M is univalent and M’ is a trivalent metal which of the following does not form alum?

Solution

Correct option is

Li

Li does not form alum because of its small size.

SIMILAR QUESTIONS

Q1

Chloride of an element gives natural solution in water. In the periodic table the element belongs to

Q2

Among the following compounds of cement which is present in the highest amount?

Q3

Sodium peroxide which is a yellow solid, when exposed to air becomes white due to the formation of

Q4

The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?

Q5

Which of the following on thermal decomposition yields a basic as well as an acidic oxide?

Q6

 

Choose the correct statement :

The reason for use of polyphosphates as water softening agents is, that

Q7

Lithium can not be stored in kerosene oil because

Q8

Which one out of the NaOH and KOH, is a better absorber of CO2?

Q9

 

Which product is formed in the following reaction

 

Q10

Which of the following is a neither deliquescent nor efflorescent and is used for wool washing?