Cho sơ đồ chuyển hóa sau: K₂Cr₂O₇ + FeSO₄ + H₂SO₄ → Y; Y + NaOH → Z; Z + Br₂ + NaOH → Z. Biết X, Y và Z là các hợp chất của crom. Hai chất Y và Z lần lượt là

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  If you inherited a million pounds, what __________ with the money?
   

• Choose the best answer for the following sentence:

  If you as I told you, you in such predicament now.
   

• Choose the best answer for the following sentence:

  Come and work for my company if you ____________ better to do.
   

• Choose the best answer for the following sentence:

  If you had done as I told you, I think you ____________.
   

• Choose the best answer for the following sentence:

  If he had got half a mark more, he _____________ in the exam.
   

• Choose the best answer for the following sentence:

  “Did you need help with your math last night?”

  “If I had had, I ___________ you.”
   

• Choose the best answer for the following sentence:

  “I’d really like some lunch but I have so much work to do.” “ __________ what you want and I can get it for you.”
   

• Choose the best answer for the following sentence:

  “John went to the hospital alone.” “If __________, I would have gone with him.”
   

• Choose the best answer for the following sentence:

  "Alice is moving to her new apartment next Saturday.” “I’ll be glad to help her, ___________ need some help.”
   

• Choose the best answer for the following sentence:

  “Did you go sailing last weekend?”

  “No. We would have gone ___________ nicer.”