SINGAPORE, Nov 24 (Reuters) - Gold rose to its strongest in five weeks on Monday, after posting its biggest daily percentage gain in almost two months the previous session, on safe haven buying driven by a weaker dollar against the euro and firm oil. -- By 0025 GMT, gold was trading at $802.80 an ounce, up $3.35 an ounce from New York's notional close on Friday, when it gained more than 7 percent as mounting economic uncertainties spurred heavy physical buying. -- On the markets front, Citigroup Inc is looking at putting risky assets in a government-supported "bad bank" -- a step to reassure investors the rest of its assets were safe, reports said on Sunday. -- Investor confidence was shaken after Citigroup's shares, the second-largest U.S. bank by assets, tumbled for a fifth straight day on Friday. -- The euro extended gains to $1.616. Oil rose over $1 to top $51 a barrel on Monday, extending the previous session's gains that were driven by a late rally on Wall Street. -- Platinum traded at $820.00 an ounce, up $8.50 from New York's late levels to track firmer gold. -- New York gold futures rose $12.1 an ounce to $803.9

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