Some Basic Concepts of Chemistry Quiz-02

1. The oxidation number of sulphur in S8, S2F2, H2S respectively, are

 

 
 
 
 

2. An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250mL . The volume of 0.1 N NaOH required to completely neutralise 10mL of this solution is

 
 
 
 

3. When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is

 
 
 
 

4. Consider a titration of potassium dichromate solution with acidified Mohr’s salt solution using diphenylamine as indicator. The number of moles of Mohr’s salt required per mole of dichromate is

 
 
 
 

5. 2.76 g of silver carbonate on being strongly heated yields a residue weighing

 
 
 
 

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