how to make laughing gas ?
Kindly refer to the similar link given below:
https://www.meritnation.com/ask-answer/question/give-one-method-oh-preparation-of-nitrous-oxide-why-it-is/the-p-block-elements/10775685
https://www.meritnation.com/ask-answer/question/give-one-method-oh-preparation-of-nitrous-oxide-why-it-is/the-p-block-elements/10775685