Which everyday device uses the principle of capillary action to function?

Which everyday device converts alternating current into direct current for charging electronic devices?

Which everyday item uses the principle of total internal reflection to transmit data as light signals?

Which medical imaging technique uses high frequency sound waves to visualise internal organs?

Which gas is most responsible for the depletion of the ozone layer?

Which structure in the heart prevents the backward flow of blood between chambers?

Which common food item is fortified with iodine in many countries to prevent deficiency related disorders?

Which everyday process converts mechanical energy into electrical energy in a bicycle dynamo?

Which respiratory condition involves inflammation and narrowing of the airways causing difficulty in breathing?

Which organ produces bile that aids in the digestion of fats?

Which organ in the human body stores and concentrates urine before it is excreted?