1. Hindu spouse cannot have a right over the self-acquired or ancestral property of the husband or wife in case of divorce. However if the property has been bought at the time when your sister was in a relationship with her husband then she can make a claim on it.

2.50% ill be your share in the joint flat.

3. The amount of alimony is calculated to keep in view many parameters like the income of the partners, societal status, the standard of living, the number of children, the number of years spent together and the emotional attachment. There isn’t any fixed formula to calculate the amount of alimony but generally, it is the 1/3 or the 1/5 part of the salary of the paying spouse.

1) in respect of properties bought in joint names she can claim 50 per cent share in said properties

2) she has no share in properties standing in name of husband or son name

3) wife can claim one third of husband income as maintenance

4) she has no share in husband ancestral property

That is a matter of claim and not a matter of right maam.

1) wife can claim right to stay in her matrimonial home

2) if any property is owned by husband and it is wife matrimonial home she can seek right to stay in her matrimonial home and seek injunction restraining husband from selling the property

A wife has no right over her husband’s self own property. A married woman has exclusive right over her own individual property. In the case of joint property they have equal right.

1. Will she be able to make claims of any of the properties on husbands or his sons name?

No, she could not claim over properties of husbands or his sons name

2. Will she be able to make claim on property on joint name ?

Yes .she has half right or (percentage of right mention in the sale deed) on joint ownership property.

3. What will be approx maintenance she will be able to get ?

A Hindu male is legally obligated to maintain his spouse. Maintenance includes provision for food, residence, clothing, education and medical attendance and treatment. A Hindu woman's right to maintenance is a personal obligation so far as the husband is concerned, and it is his duty to maintain her even if he has no property. The maintenance amount is calculated (approximately) by taking into account the total monthly take home income (ie. without tax) of both the spouses. The educational background of the spouses, the number of years of marriage, number of children and child custody are also major factors, which govern the maintenance amount. Maintenance amount can also depend on who well the lawsuit has been fought by the advocates of both parties. The spouse with lesser income or no income can get a maintenance amount, which will make his/her complete earnings (plus maintenance) to be equal to 20% to 30% of the above total monthly income. If a woman’s income is at least half of her husband’s income, then most often she may not get any maintenance.

4. Will she be able to make claim on husband's ancestral farm property.

She could not claim on husband’s ancestral farm property

A wife is not entitled to any allowance if she, without sufficient cause, refuses to live with her husband. Marriage throws an obligation on the wife, to live and co-habit with her husband. Only on reasonable grounds she is justified to live separate from him.

She cannot make any claim in her husband or his son's, property.

She can claim her share in the jointly owned property.

She can claim maintenance to the extent of at least one fourth of his proved income.

She has no rights in her husband's ancestral property.

The subsequent query about share in property and your understanding about it is just misguidance.

There is no law to claim a share in his properties as a right during his lifetime even being a legally wedded wife.