Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the  presence of: 

1)  two ethylenic double bonds   
2)  an isopropyl group  
3)  a vinyl group 
4)  an acetylenic triple bond
   

Cynocobalamin contains which element

1)  Co

2)  Ca

3)  Zn

4)  Mg

The carboxyl functional group (— COOH) is present in

1) picric acid  
2) barbituric acid
3) ascorbic acid
4) aspirin

Acetone is soluable in water due to 

1. methyl group 
2. neutral nature 
3. dissociation in water 
4. hydrogen bonding 

For the reaction between KMnO₄? and H₂O₂?, the number of electrons transferred per mole of H₂?O₂? is:

1) 1

2) 2

3) 3 

4) 4

To what volume, in mL, must 50.0 mL of 3.50 M H₂?SO₄? be diluted in order to make 2 M H₂?SO₄??

1) 25
2) 60.1
3) 87.5
4) 93.2

The order of stability of the following carbocations:

1)  III > II > I   
2)  II > III > I  
3)  I > II > III 
4)  III > I > II
   

The atoms/ion listed in correct order of increasing size are

1)  Be²⁺, Mg²⁺, Na⁺

2)  Na⁺, Cl ^-, K⁺

3)  Al, Na, S

4)  Na, Si, H

One mole of hydrogen iodide is heated in a closed container of capacity 2 liters. At equilibrium half a mole of hydrogen iodide is dissociated. The equilibrium constant is

1) 1.00
2) 0.50
3) 0.25
4) 0.75

Which is wrongly matched ?

1) Duralumin-Al+Cu+Mg+Mn
2) Alnico-Fe+Al+Ni+Co
3) German silver-Cu+Zn+Ni
4) Monel metal-Cu+Zn+Sn