Are there any limits placed on the executive power of the Union by this Constitution?
Yes, there are limits placed on the executive power of the Union by this Constitution. The provisions of this Constitution restrict the executive power of the Union in certain cases. For example, Article 72(1) (a) states that "The President shall have the power to grant pardons, reprieves, respites or remissions of punishment or to suspend, remit or commute the sentence of any person convicted of any offence— Martial". However, this does not affect the power conferred by law on any officer of the Armed Forces of the Union to suspend, remit or commute a sentence passed by a Court Martial. Additionally, Article 72(3) states that nothing in sub-clause (c) shall affect the power to suspend, remit or commute a sentence of death exercisable by the Governor of a State under any law for the time being in force.