about liquid

of course not
liquid is different from aqueous solution
aqueous solution means a solution formed by dissolving something in water
and liquid is something which between its boiling point and melting point
for example
aqueous copper(II) sulphate solution = copper(II) sulphate + water
liquid copper(II) sulphate = molten copper(II) sulphate

水只是其中一種液體,水変了冰時也不是液體了

liquid指液體外,也可以指液態,很多物質都是有液態的,氣體和金屬也有,只是氣體要変成液體要很低溫,金屬要很高溫, 其實常溫下還有不少的非水的液體,油...等等

No,,,!

aqueous solution contain water...but liquid don't contain water

e.g/ Mercury is a liquid but it doesn't contain water

liquid係液體,舉個例,一塊iron solid( no water)用高溫燒溶佢,就係liquid ,so liquid is not contain water. 'Solution' contains water(H2O).I am sure.

YES! Otherwise, it can not be the liquid!!