There is nothing as nawafil zakat! There is voluntary sadaqa and there is mandatory zakat. Mandatory zakat can’t be given in building masjids.

can i give nawafil zakah (on behalf of the deceased or shahid)to build a mosque or for any good deed?

Charity | November 9, 2015 3:17 am
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Is it permissible for children to dress in pink to school to donate money for the breast cancer research? The school has organised a day to collect money to donate for cancer charity. And another question please, is it ok to give a gift to their teachers when it’s teachers day?
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Is it okay for me to give my interest money for a funeral to a poor Non Muslim family?