1.You are more
stronger than I. (x)
→You are stronger than I. (√)
2.She is
growing weak and weak every day.
→She is growing weaker and weaker every day. (√)
3.Mohan is
elder than Salim. (x)
→Mohan is older than Salim. (√)
4.Delhi is
older than all cities in India. (x)
→Delhi is the oldest of all cities in India. (√)
5.You have
taken whole apple. (x)
→You have taken the whole of apple. (√)
6.Bombay is
further from Delhi than Amritsar. (x)