Which gas do we exhale when we breathe out?

Which kitchen appliance works on the principle of magnetron producing microwaves?

Which of these is used to keep food cold and fresh?

Which of these is a renewable source of energy sometimes used in homes?

What does soap mainly help remove from our hands?

Which of these metals is commonly used for making cooking utensils?

Which part of the candle burns to give light?

Which of these simple machines is used in a pair of scissors?

Which household item is most often powered by dry cells (batteries)?

Which of these changes of state happens when water in a kettle boils?