Home Practice Question 4000
Medium
 SOF National Science Olympiad (NSO/ISO) · NSO Level 1 · 2020 . Sample

Practice variant 3: Which substance turns blue litmus red?

Related Questions

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

Which one of the following is a double displacement reaction?

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

Which of the following correctly shows the sequence of energy transformation in a hydroelectric power plant?

SOF National Science Olympiad (NSO/ISO) .
Medium
· Physics · 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

A mixture contains sand, common salt and iron filings. Which sequence of steps separates all three components correctly?

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