مشتری می‌پرسد که آیا به ترکیبات این پاک‌کننده اشاره می‌شود.

From Lesson 366:Impersonal passives·Farsi

Questions & Answers about مشتری می‌پرسد که آیا به ترکیبات این پاک‌کننده اشاره می‌شود.

Why does the sentence use به ترکیبات with a passive verb, instead of just making the ingredients the subject?
The active verb is اشاره کردن به (to point to / refer to), which requires the preposition به. When a Farsi verb takes a preposition, its passive form is "impersonal." This means the verb stays fixed in the third-person singular (اشاره می‌شود), and the object remains attached to its preposition (به ترکیبات) instead of becoming the main subject of the sentence.
Can آیا be used in the middle of a sentence like this? I thought it only started yes/no questions.
Yes! While آیا is commonly used at the beginning of direct yes/no questions, here it is used after که to mean "whether" or "if" in an indirect question. The combination که آیا is the standard way to introduce an embedded yes/no question in Farsi.
How is the word پاک‌کننده formed?
It is an active participle formed from the compound verb پاک کردن (to clean). It combines پاک (clean) with کن (the present stem of کردن) and the suffix ـنده (which indicates the "doer" of an action). Literally, it means "clean-maker" or "cleanser."
What kind of plural is ترکیبات?
It uses the Arabic plural suffix ـات (-aat), which Farsi frequently borrows for formal, abstract, or scientific words. Here, it turns the singular ترکیب (compound or composition) into ترکیبات (ingredients or compounds).

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