जब किसी हाइड्रोकार्बन का पूर्ण दहन होता है, तो निम्नलिखित में से कौन सा उत्पाद प्राप्त नहीं होता है?

Which of the following is a combustion process?

Which of the following conditions will result in the incomplete combustion of a carbon compound?

Which gas is primarily produced during the complete burning of coke in excess air?