Axit cacboxylic X có công thức đơn giản nhất là C₃H₅O₂. Khi cho 100 ml dung dịch axit X nồng độ 0,1M phản ứng hết với dung dịch NaHCO₃ (dư), thu được V ml khí CO₂ (đktc). Giá trị của V là: 

A. 336

B. 112.

C. 448.

D. 224.

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

A. bats

B. dates

C. days

D. speaks

Mark the letter A, B, C or D to indicate the sentence that is closest in meaning to each of the following questions.

Question 28: As we were heading out of the café, we bumped into our plumber, who we still owed money to.

A. Our plumber, whom we hadn't paid back yet, was the person who we encountered by chance at the moment we were exiting the café.

B. When we met our plumber in the café as we were about to leave, we realised that we hadn't yet paid him all the money we owed him.

C. Our plumber, when we ran into him as he was entering the café that we were leaving, didn't bring up our debt to him.

D. Not wanting to see the plumber to whom we still owed a debt, we quickly headed out of the café when we saw him coming in.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions

His lack of qualifications was taken as a sign of a ____ youth.

A. misused

B. misbehaved

C. misspent

D. mistaken

Trường hợp nào sau đây không xảy ra phản ứng ở điều kiện thường?

A. Dẫn khí Cl₂ vào dung dịch H₂S

B. Cho dung dịch Ca(HCO₃)₂ vào dung dịch NaOH

C. Cho dung dịch Na₃PO₄ vào dung dịch AgNO₃

D. Cho CuS vào dung dịch HCl