Inclination is feeling of wanting to do something and aversion is feeling of dislike or turning away.

Infinite means endless or limitless. Therefore, 'Limited' will be its antonym.

Inference is assumption/conclusion. Antonym is reality/fact.

 Indifferent and apathetic are similar in meaning. Kind and compassionate would be opposite to mean and cruel. Responsible is the correct choice because someone who is responsible  feels a sense of responsiblity towards something .... and will not feel indifferent, apathetic or uncaring towards that.

Intrinsic is inherent or innate. Correct opposite is extrinsic meaning not inherent i.e. extraneous.

Insolent means rude, so courteous would be its opposite.

Intellect means capability of the mind. Inanity means silliness. So, it is the correct opposite.

 Ingenuity means intelligent or genius, therefore stupidity is the correct choice because it is opposite in meaning.

Install is to place in an office or rank. Dethrone is to remove from a high position.

Invincible means that cannot be conquered / invulnerable. So opposite is beatable...i.e which can be captured or conquered.

Jade means worn out and fresh is something newly made. So, fresh is the correct antonym of jade.

Jaunt means short trip for pleasure. Pilgrimage means any long journey, as to a place of historical interest. So both are antonyms.  

 Happiness is closest in opposite meaning to jealousy.

Jeer means mocking remarks. So, applaud/cheer is opposite.

Jocular means jolly/happy. So, opposite is dull.

Chaotic means in a disordered condition. So opposite is orderly (neat/ tidy in arrangement).

Chaste means moral. So, opposite is immoral.

Intentional means something done purposely. So, antonym is accidental.