Heat the oven to 425°F and line an 18-by-13-inch rimmed sheet pan with foil. Toss carrots, chickpeas and onion with 1 tablespoon oil and 1/4 teaspoon salt and roast for 18 minutes.
Pat chops dry and rub with remaining oil, coriander, cumin, garlic powder, pepper and remaining salt.
Turn the vegetables and make 4 open spaces for the chops, placing the meat directly against the foil.
Roast for 15 to 20 minutes until the thickest chop reaches 145°F and carrots are tender, turning the chops once after 10 minutes.
Rest the pork for at least 3 minutes. Drizzle lemon juice over the vegetables and serve 1 chop with one-quarter of the carrots and chickpeas per portion.