Home Practice Question 3990
Easy
 SOF National Science Olympiad (NSO/ISO) · NSO Level 1 · 2023 . Sample

Which substance turns blue litmus red?

Related Questions

A gardener cuts a piece of rose stem with a node, plants it in soil and a new rose plant grows from it. This mode of reproduction is called:

SOF National Science Olympiad (NSO/ISO) .
Easy
· Biology · 2026
See Explanation

Fill in the blank: The ozone layer, which protects living things from harmful ultraviolet rays, is found in the ______.

SOF National Science Olympiad (NSO/ISO) .
Easy
· Science · 2026
See Explanation

Which one of the following is a double displacement reaction?

SOF National Science Olympiad (NSO/ISO) .
Medium
· Chemistry · 2026
See Explanation

How many of the following are chemical changes? (i) Burning of paper (ii) Melting of wax (iii) Curdling of milk (iv) Dissolving salt in water

SOF National Science Olympiad (NSO/ISO) .
Medium
· Chemistry · 2026
See Explanation

The table shows four species: W: 6 protons, 6 neutrons X: 7 protons, 7 neutrons Y: 6 protons, 8 neutrons Z: 8 protons, 8 neutrons Which two species are isotopes of the same element?

SOF National Science Olympiad (NSO/ISO) .
Medium
· Chemistry · 2026
See Explanation