निम्नलिखित में से किसका उपयोग कृत्रिम मधुरक (आर्टिफिशियल स्वीटनर) के रूप में किया जाता है?

To prevent the oxidation and rancidity of potato chips during storage, manufacturers flush the sealed bags with which gas?

Early matches ignited when struck on a rough surface primarily due to the friction of which substance?