In permanganometric titrations, the end point is :
1) yellow colour
2) pink c
The integrating factor of the differential equation
1) x 2) - 1/ x
Young's moduli of two wires A and B are in the ratio 7 : 4. Wire A is 2 m long and has radius
Amphoteric oxide is: 1) Al2O3? 2) SiO2