Biology questions, please provide answers

1.

Ordinary table salt is sodium chloride. What is baking soda?

A. Potassium chloride
B. Potassium carbonate
C. Potassium hydroxide
D. Sodium bicarbonate


2.

3.

Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to

A. angiosperms
B. gymnosperms
C. monocotyledons
D. dicotyledons

 
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