Which of the following is implied authority of a partner in a firm?

Receiving payment of a sum due to the firm is within a partner's implied authority under s.19, so a partner who "receives a sum of money on behalf of the firm" binds the firm; under s.19(2) he cannot "enter into a partnership on behalf of the firm" or "admit liability in a suit on behalf of the firm", and a partner who "opens a banking account on behalf of the firm in his own name" acts outside implied authority.