Choose the most appropriate answer from the given options:

a) Which of the following is an example of triatomic molecule?

i) NaCl ii) CaO iii) CaCO3 iv) H2O

b) Making bread from flour is

i) an irreversible change ii) a slow change iii) a chemical change iv) all of the above

c) A separating funnel is used to separate
i) solids of different sizes ii) a solid from a liquid iii) liquids that do not mix well iv) different coloured solutions

d) Formation of a compound is ___________ change.
i) temporary ii) physical iii) reversible iv) chemical

e) Which of these methods would you use to separate a mixture of salt and sand in water, and also
recover the water?
i) handpicking and solubility ii) evaporation and filtration iii) filtration and distillation iv) sublimation and evaporation

f) Which of the following is not an example of a physical change?
i) mixing iron filings with sulphur ii) cooking vegetables in water iii) carving shapes from vegetables iv) slicing bread