Can private limited company invest in Liquid funds?


We have some surplus cash in our Current bank account. As being current account banks doesn’t pay any interest so can we investment in liquid funds? Please help me with following questions:

  1. How much maximum amount can be investment in Liquid funds?
  2. Does all Current account pr Pvt limited companies invest they surplus working capital in Liquid funds?
  3. How much time to withdraw the entire investment?
  4. Any withdrawal limit per day?
  5. Taxation?
  6. Best riskless liquid fund?