Yes, generally it is acceptable in Jain diet to eat soya chunks with curd, if both are pure and suitable for your Jain observance.

A few points to keep in mind:

• Soya chunks should be free from onion, garlic, and any non-vegetarian ingredients.
• Curd is normally allowed in Jainism, but many Jains avoid fermented or sour dairy foods at night.
• If you follow a strict Jain practice, it is best to eat such foods during the daytime and fresh.

So, daytime: usually yes nighttime: avoid if you follow stricter Jain rules

If you want, I can also tell you which dairy and soy foods are generally allowed or avoided in Jainism.