Revaluation account is not prepared at the time of:

Dissolution of firm

The correct answer is Option (4) - Dissolution of firm.

At the time of admission of a new partner, retirement of partner and change in profit sharing ratio,  it is always desirable to ascertain whether the assets of the firm are shown in books at their current values. In case the assets are overstated or understated, these are revalued. Similarly, a reassessment of the liabilities is also done so that these are brought in the books at their correct values. At times there may also be some unrecorded assets and liabilities of the firm. These also have to be brought into the books of the firm. For this purpose the firm has to prepare the Revaluation Account. The gain or loss on revaluation of each asset and liability is transferred to this account and finally its balance is transferred to the capital accounts of the old partners in their old profit sharing ratio. In other words, the revaluation account is credited with increase in the value of each asset and decrease in its liabilities because it is a gain and is debited with decrease in the value of assets and increase in its liabilities is debited to revaluation account because it is a loss. Similarly unrecorded assets are credited and unrecorded liabilities are debited to the revaluation account. If the revaluation account finally shows a credit balance then it indicates net gain and if there is a debit balance then it indicates net loss which will be transferred to the capital accounts of the old partners in old ratio.

*At the time of dissolution of firm, realisation account is prepared not revaluation account. When the firm is dissolved, its books of account are to be closed and the profit or loss arising on realisation of its assets and discharge of liabilities is to be computed. For this purpose, a Realisation Account is prepared to ascertain the net effect (profit or loss) of realisation of assets and payment of liabilities which may be is transferred to partner’s capital accounts in their profit sharing ratio.