Carbon and its Compounds — Science STD 10 — Question

What does the symbol (aq) represent in a chemical equation?

Will current flow more easily through a thick wire or a thin wire of the same material when connected to the same source? Give reason for your answer.

How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal?

Why should magnesium ribbon be cleaned before burning in air?

What is the nature of a lens whose power is, -4D?

Name the product of petroleum that is used to drive heavy vehicles.

State one function each of cerebellum and pons.

Name the phenomenon due to which a pencil partly immersed in water and held obliquely appears to be bent at the water surface.

Give one example of a hydrocarbon, other than pentane, having more than three isomers.