IIT-JEE-Chemistry-Final Revision Set No.67

1. Among the following the molecule with the highest dipole moment is :
(a) CH3CI
(b) CH2CI2
(c) CHCI3
(d) CCI4

2. For H3PO3 and H3PO4 the correct choice is:
(a) H3PO3 is dibasic and reducing
(b) H3PO3 is dibasic and non-reducing
(c) H3PO4 is tribasic and reducing
(d) H3PO3 is tribasic and non-reducing

3. When MnO2 is fused with KOH, a coloured compound is formed, the product and its colour is :
(a) K2MnO4, purple green
(b) KMnO4, purple
(c) Mn2O3, brown
(d) Mn3O4 black
4. Rate of physiorption increases with :
(a) decrease in temperature
(b) increase in temperature
(c) decrease in pressure
(d) decrease in surface area

5. Which has maximum number of atoms?
(a) 24g of C
(b) 56 g of Fe
(c) 27g of Al
(d) 108 g of Ag