Genius! Can you give answer?| CBSE Class 7| Seema Ma'am #shorts

Fill in the boxes with alphabets to give correct answer. I am a metal that is used in the process of hydrogenation.

Fill in the boxes with alphabets to give correct answer. I am a gas which reacts with hydrogen to produce ammonia

If it is possible to make a meaningful word with the second, the fifth, the tenth and the twelfth letters of the word 'METROPOLITAN', which of the following will be the third letter of that word? If no such word can be made give X as the answer and if more than one such word can be made, give Mas the answer.