Estate - Share and Part

What happens when the testator bequeaths a specific portion of his estate to someone who is an heir under law?

That person will get the specific portion left to him/her in the will in addition to what he/she will get according to law.

What is the legal position when the testator leaves a beneficiary a specific portion as well as a relative part of the whole estate, in his will?

That person will get the portion as well as the relative part of the estate.

What is the legal position when it is clear from what is written in the will that the testator intended just to give a beneficiary a portion , and not portion in addition to what he would get as an heir under law?

Where it is entirely clear from the wording that this was the testator's true intention, then the beneficiary will only get the portion.

Can a testator give an instruction in a will for a particular property to be transferred to a beneficiary when it is free of all mortgages , or of any kind of charge?

Yes – and the debt to any creditor will be paid by the estate