Question

what happens when fundamental duties not there​

Answer 1

In case of non-compliance with the fundamental duties, the Parliament can impose penalty or punishment. In a court of law, such punishment or law won't be questioned.

Answer 2

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• The Constitution will "lose its importance" if there is no redressal for breach of fundamental rights, such as right to life and fair trial, of the citizens by private individuals who are performing state actions, the Supreme Court said on Wednesday.
• Fundamental rights safeguard the personal interest of indian citizen,provide the fillings of equality,protects the citizens form exploitation , allow them to practice their religions , provide education to everyone ,access to constitutional law & maintaining privacy and dignity of a citizen.