I 485 pending and citizenship change

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Hello,.

I am a citizen of india and have my I 140 approved and waiting to file 485. Now i have an oppurtunity to apply for canadian citizenship.
Questions :

1. If i get Canadian citizenship, will my H1b approved with Indian passport be invalidated ?

2. Will i have to restart the green card process from scratch or i can still file my 485 with Canadian passport ?

3. Also, just say, i start the 485 with Indian passport and before getting my green card, i get canadian passport ?