1) How many types of indicators are there ? a) Three b) Two 2) When turmeric mixed with basic solution it turns into. a)  Red colour b) Green colour  3) China rose indicator when reacts with base it turns into. a) Pink colour b) Green colour 4) Red litmus paper turns blue if the substance is basic. a) True b) False 5) There are two types of litmus paper . a) True b) False

Indicators

列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?