xactly madee.....so dats y ders no change in da electrolyte....so it is 'b'...
n thnkz though madee n i-insane...i 4got abt dat sodium CO3 duznt decompose......but is iron carbonate white?
No kidding, but I've never even heard of zinc carbonate
But, sodium carbonate doesn't decomposes, lead oxide is black, copper oxide is black, iron oxide is yellow..so iron is the only thing possible. Even if you consider sodium, sodium oxide is white.