user-avatar
baclin8
1 năm trước
Chương 4: Đại cương về hóa hữu cơ và Hidrocacbon Oxi hoá ancol etylic với O2 trong điều kiện thích hợp thu được hỗn hợp X gồm anđehit, axit, ancol dư và nước. Chia hỗn hợp X thành 2 phần bằng nhau. Phần 1 cho tác dụng với Na dư, thu được 6,272 lít H2 (đktc). Trung hoà phần 2 bằng dung dịch NaOH 2M thấy hết 120 ml. Vậy % ancol etylic bị oxi hóa thành axit là A. 42,86%. B. 66,7%. C.85,7%. D. 75%
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Choose the word which is stressed differently from the rest: 1. a. expression b. easily c. depression d. disruptive 2. a. algebra b. musical c. politics d. apartment 3. a. mechanic b. chemistry c. cinema d. finally Choose the word which has the underlined part pronounced differently from the rest: 4. a. final b. applicant c. high d. decide 5. a. average b. indicate c. application d. grade Choose a, b, c, or d that best completes each unfinished sentence or substitutes the underlined part: 6. An _______ is a student at a university or college who is studying for his or her first degree. a. undergraduate b. applicatio c. insurance d. exam 7. Entry to university is competitive so some _______ with the minimum entrance qualifications will find themselves without a place. a. tutors b. professors c. teachers d. applicants 8. Students also have the opportunity to choose from a wide range of _______ courses in the university. a. compulsory b. optional c. required d. limited 9. Mr. Dolp provided us with an _______ guide to the full-time and part-time programs on offer to a range of candidates drawn from schools and colleges. a. inform b. informative c. informed d. information 10. Not many places at the universities are left, so choice is on a severe _______. a. limiting b. limitation c. delimitation d. limited Put each verb in brackets into an appropriate tense: 11. The earthquake (cause) __________ less damage if the houses (be)_________ of stronger construction. 12. Had Lilly (not eat)____________ so much, she (not put)___________ on weight. 13. She had a headache; otherwise she (come)__________ with us.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team