Carbon and its Compounds — Science STD 10 — Question

What chemical process is used for obtaining a metal from its oxide?

Name the three allotropic forms of carbon.

Which property of copper and aluminium makes them suitable:
For making cooking utensils and boilers?

Name the non-metal which is used:
To convert vegetable oil into vegetable ghee(solid fat).

Ammonia reacts with oxygen to form nitrogen and water. Write a balanced chemical equation for this reaction. Add the state symbols for all the reactants and products.

Rewrite the following statement after correction, if necessary:
Groups have elements with consecutive atomic numbers.

Li	Be
Na
K
Rb
Cs
Fr	Ra

What colours do the following indicators turn when added to an acid (such as hydrochloric acid)?

1. Litmus.
2. Methyl orange.

Which functional group is likely to be present in an organic compound having the molecular formula C₄H₁₀O? Write the formula of the organic compound.

Which property of ‘solder’ alloy makes it suitable for welding electrical wires?