Wastewater Story — Science STD 7 — Question

The region, which receives very little rainfall, is:

Which of the following does not express a time interval?

After conducting the starch test, a leaf shows no blue-black colour even though it was green and placed in sunlight. What is the most likely reason?

Why is the small intestine long despite being called "small"?

Calcium hydroxide is found in:

The uneven heating of land takes place due to:

Tornado reaches:

You are provided with three unknown solutions labelled A, B, and C, but you do not know which of these are acidic, basic, or neutral. Upon adding a few drops of red litmus solution to solution A, it turns blue. When a few drops of turmeric solution are added to solution B, it turns red. Finally, after adding a few drops of red rose extract to solution C, it turns green. Based on the observations, which of the following is the correct sequence for the nature of solutions A, B, and C?

A plant was kept in sunlight but its roots were removed and the stem was placed in dry cotton. After three days, the plant wilted. Which conclusion is most valid?