Article 51A of Our Constitution lists down a number general and largely unenforceable duties for the Citizens of India but NOT THE DUTY TO VOTE.
These Duties were apparently inspired by The Constitution of the Soviet Union and inserted in our Constitution in 1976. Unfortunately there was no voting in The Soviet Union.
Read below the relevant Part of our Constitution if you want to:
PART IVA FUNDAMENTAL DUTIES
ARTICLE 51A. It shall be the duty of every citizen of India—
(a) to abide by the Constitution and respect its ideals and institutions, the National Flag and the National Anthem;
(b) to cherish and follow the noble ideals which inspired our national struggle for freedom;
(c) to uphold and protect the sovereignty, unity and integrity of India;
(d) to defend the country and render national service when called upon to do so;
(e) to promote harmony and the spirit of common brotherhood amongst all the people of India transcending religious, linguistic and regional or sectional diversities; to renounce practices derogatory to the dignity of women;
(f) to value and preserve the rich heritage of our composite culture;
(g) to protect and improve the natural environment including forests, lakes, rivers and wild life, and to have compassion for living creatures;
(h) to develop the scientific temper, humanism and the spirit of inquiry and reform;
(i) to safeguard public property and to abjure violence;
(j) to strive towards excellence in all spheres of individual and collective activity so that the nation constantly rises to higher levels of endeavour and achievement;
*[(k) who is a parent or guardian to provide opportunities for education to his child or, as the case may be, ward between the age of six and fourteen years.] *Inserted in 2002