निम्नलिखित में से कौन सा संपीड़ित प्राकृतिक गैस (CNG) का मुख्य घटक है?

Methane reacts with steam at 1273 K in the presence of nickel catalyst to form:

Predict the main product of the following reductive ozonolysis reaction: CH≡CH + O3 followed by H2O/Zn → ?

Which of the following alkanes cannot be prepared in good yield by Kolbe's electrolytic method?