एथीन औद्योगिक रूप से मुख्य रूप से किस प्रक्रिया द्वारा प्राप्त किया जाता है?

Which of the following chemical compounds is synthesized industrially using the Haber process?

Arrange the following operations in the correct sequence during cement preparation: (K) Crushing of raw materials (L) Proportioning and blending (M) Burning in kiln (N) Grinding with gypsum (O) Packaging