1. Baking soda turns 1.turmeric red
2.purple cabbage juice green
3.red litmus blue
4.all of the above

D) all of the above

Explanation:

Turmeric, purple cabbage juice (containing anthocyanin), and litmus paper all act as indicators which help us to detect whether a particular substance is acidic or basic.

In basic medium, turmeric changes it's colour to red, purple-cabbage juice turns to green and red litmus turns to blue.

Baking soda/Sodium carbonate Na

is basic in nature and thus causes the above changes in the indicators.

the answer is:

carbon dioxide

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