Everyone was stunned at the same time, thinking that the invigilator with a high nose bridge had pronounced it wrong.

I saw that the stern look on the face of the high-nose invigilator turned into a smile. He walked back and gave Qin Ke a thumbs up:

"Boy Xia Guo, you are great. The concentration of the concentrated hydrochloric acid provided this time is indeed only 29.5%. You were the first to discover and raise objections. Your carefulness, intelligence, self-confidence, and courage to stick to your principles automatically enabled you to obtain Full marks for the first question.”

The other dozen or so invigilators in the examination room laughed and clapped together.

The high-nose invigilator looked at Ning Qingyun, An Xianzhi, and Shen Xilin again and said with a smile: "Of course, the same goes for you."

He then looked around at the confused candidates and said solemnly: "This chemistry experiment exam has added such a key trap. If no one points it out, then even if your plan and all operations are correct, No points will be scored. If someone can point it out and insist on their correct point of view, then they will get full points, while the others will only get 0 points!"

"Don't be dissatisfied." The team leader of the on-site proctor, an old man with short blond hair, said:

"When I announced the examination room regulations just now, I said that from the time the examination is announced, you will enter the experimental examination stage, and all operations and steps must meet the requirements of the questions.

"The reaction of manganese dioxide and concentrated hydrochloric acid to generate chlorine gas is the most basic entry-level operation. You will conduct such an experiment from the first year of studying chemistry. If you observe carefully and patiently when doing this experiment, it is It’s not difficult to find abnormalities, but unfortunately most of you don’t. You are careless when doing experiments because you are familiar with them, and you blindly believe in the so-called authority. How can you become a great chemist?”

"The addition of this key trap is one of the most important secret reform factors of our current IChO experiment. Because we feel that it is necessary for all those who love chemistry to have such an unforgettable education class, so that you can be successful in the future. Go further on the road to chemistry!”

The blond old gentleman ignored the gray-faced Huang Wei and all the candidates, walked up to Qin Ke, smiled and gave a thumbs up: "I remember you, Qin Ke from Xia State, your performance is very good, especially I was able to figure out the correct hydrochloric acid concentration of 29.5% directly without using a pen and paper, which amazed me. Keep working hard on the following questions, I will not guarantee whether there are any traps."
Chapter completed!