So sánh tốc độ của hai phản ứng sau thực hiện ở cùng một nhiệt độ khối lượng Zn sử dụng là như nhau

Trang chủ Đề thi & kiểm tra Lớp 10 Hoá học 25 câu trắc nghiệm Tốc độ phản ứng và cân bằng hóa học !!

So sánh tốc độ của 2 phả...

Câu hỏi: So sánh tốc độ của 2 phản ứng sau (thực hiện ở cùng nhiệt độ, khối lượng Zn sử dụng là như nhau) .

A.(1) nhanh hơn (2).

B.(2) nhanh hơn (1).

C. như nhau.

D.ban đầu như nhau, sau đó (2) nhanh hơn(1)

Đáp án

A

- Hướng dẫn giải

Đáp án A

Sử dụng yếu tố diện tích tiếp xúc, TN1 Zn dạng bột sẽ làm tăng diện tích tiếp xúc, tốc độ phản ứng xảy ra nhanh hơn

Câu hỏi trên thuộc đề trắc nghiệm

25 câu trắc nghiệm Tốc độ phản ứng và cân bằng hóa học !!

Lớp 10 Hoá học Lớp 10 - Hoá học

Đáp án A

Sử dụng yếu tố diện tích tiếp xúc, TN1 Zn dạng bột sẽ làm tăng diện tích tiếp xúc, tốc độ phản ứng xảy ra nhanh hơn

Câu hỏi trên thuộc đề trắc nghiệm dưới đây !

Số câu hỏi: 25

Zn (bột) + dung dịch CuSO41M (1)

Zn (hạt) + dung dịch CuSO41M (2)

Kết quả thu được là

So sánh tốc độ của 2 phản ứng sau (thực hiện ở cùng nhiệt độ) : Zn (bột) + dung dịch CuSO4 1M (1) Zn (hạt) + dung dịch CuSO4 1M (2) Kết quả thu được là :

A. (1) nhanh hơn (2).

B. (2) nhanh hơn (1).

C. như nhau.

D. không xác định được.

Đáp án và lời giải

Đáp án:A

Câu hỏi thuộc đề thi sau. Bạn có muốn thi thử?

Bài tập trắc nghiệm hóa học lớp 10 Chuong 7: Tốc độ phản ứng – Các yếu tố ảnh hưởng đến tốc độ phản ứng - đề ôn luyện số 2 - cungthi.vn

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Một số câu hỏi khác cùng bài thi.

• Một phản ứng xảy ra trong bình kín : 2NO (k) + O2 (k)

  
  2NO2 (k) Giữ nguyên nhiệt độ, nén hỗn hợp phản ứng xuống còn 1/3 thể tích. Kết luận nào sau đây không đúng ?

• Cho phương trình hóa học của phản ứng tổng hợp amoniac :

  
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• Cho phản ứng : 2SO2 (k) + O2 (k) ->2SO3 (k) Tốc độ phản ứng thuận tăng lên 4 lần khi :

• Cho phản ứng : A (k) + 2B (k) ->C (k) + D (k) Khi tăng nồng độ của chất B lên 2 lần, nồng độ A không đổi, vận tốc phản ứng thuận sẽ tăng lên

• Trong gia đình, nồi áp suất được sử dụng để nấu chín kỹ thức ăn. Lí do nào sau đây là thích hợp cho việc sử dụng nồi áp suất ?

• Cho phản ứng : 2KClO3 (r)

  
  2KCl(r) + 3O2 (k). Yếu tố không ảnh hưởng đến tốc độ của phản ứng trên là :

• Cho phản ứng phân huỷ hiđro peoxit trong dung dịch : 2H2O2

  
  2H2O + O2 Những yếu tố ảnh không hưởng đến tốc độ phản ứng là :

• So sánh tốc độ của 2 phản ứng sau (thực hiện ở cùng nhiệt độ) : Zn (bột) + dung dịch CuSO4 1M (1) Zn (hạt) + dung dịch CuSO4 1M (2) Kết quả thu được là :

• So sánh tốc độ của 2 phản ứng sau (thực hiện ở cùng nhiệt độ, thành phần Zn như nhau) : Zn + dung dịch CuSO4 1M (1) Zn + dung dịch CuSO4 2M (2) Kết quả thu được là :

• So sánh tốc độ của 2 phản ứng sau : Zn (hạt) + dung dịch CuSO4 1M ở 25oC (1) Zn (hạt) + dung dịch CuSO4 1M ở 60oC(2) Kết quả thu được là :

• Thực nghiệm cho biết tốc độ phản ứng A2 + B2

  
  2AB được tính theo biểu thức : v = k.A2][B2]. Trong các điều khẳng định dưới đây, khẳng định nào phù hợp với biểu thức trên ?

• Có phương trình phản ứng : 2A + B ->C Tốc độ phản ứng thuận tại một thời điểm được tính bằng biểu thức: v = k.[A]2.[B]. Hằng số tốc độ k phụ thuộc :

• Cho phản ứng A + 2B->C.Nồng độ ban đầu của chất A là 1M, chất B là 3M, hằng số tốc độ phản ứng k = 0,5. Tốc độ của phản ứng khi đã có 20% chất A tham gia phản ứng là :

• Tốc độ của một phản ứng có dạng :

  
  (A, B là 2 chất khác nhau). Nếu tăng nồng độ A lên 2 lần, nồng độ B không đổi thì tốc độ phản ứng tăng 8 lần. Giá trị của x là :

• Cho phản ứng : A + xB

  
  ABx. Khi tăng nồng độ các chất lên 2 lần thấy tốc độ phản ứng tăng lên 16 lần. Giá trị của x là :

• Trong phản ứng tổng hợp NH3, trường hợp nào sau đây tốc độ phản ứng thuận sẽ tăng 27 lần ?

• Vận tốc của phản ứng sẽ tăng lên bao nhiêu lần khi tăng nhiệt độ từ 0oC đến 40oC, biết khi tăng nhiệt độ lên 10oC thì tốc độ phản ứng tăng lên gấp đôi.

• Khi nhiệt độ tăng thêm 10oC thì tốc độ phản ứng tăng 3 lần. Khi nhiệt độ tăng từ 20oC lên 80oC thì tốc độ phản ứng tăng lên

• Hệ số nhiệt độ của tốc độ phản ứng là giá trị nào sau đây ? Biết rằng khi tăng nhiệt độ lên thêm 30oC thì tốc độ phản ứng tăng lên 64 lần.

• Hệ số nhiệt độ của tốc độ phản ứng là giá trị nào sau đây ? Biết rằng khi tăng nhiệt độ lên thêm 50oC thì tốc độ phản ứng tăng lên 1024 lần.

• Để hoà tan hết một mẫu Zn trong dung dịch axit HCl ở 20oC cần 27 phút. Cũng mẫu Zn đó tan hết trong dung dịch axít nói trên ở 40oC trong 3 phút. Vậy để hoà tan hết mẫu Zn đó trong dung dịch nói trên ở 55oC thì cần thời gian là :

Một số câu hỏi khác có thể bạn quan tâm.

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