"Exam time, three hours."

"Points will be deducted for extending the time, up to 4 hours."

"Unless there are special circumstances, you are not allowed to leave the venue."

"Please dress appropriately throughout the process, wear gloves, and be sure to wear protective glasses when using concentrated alkali solutions."

"Conversation with other candidates is prohibited throughout the entire process. Please consult the examiner with any questions."

"The final score of the experiment is composed of result points, operation points, and other points."

"Finally, please read the experimental instructions carefully."

After Hu Zengwu finished speaking, he scanned the entire audience.

"This experiment will also determine whether you can enter the provincial team."

"If you have any questions, tell me now."

After a pause of seven or eight seconds, when no one spoke, Hu Zengwu made a gesture to the left and right.

The exam officially begins.

Li Zheng got the test paper and raw materials, glanced at them briefly, and then his eyes widened in shock.

[Preparation of lead oxide from lithopone waste residue]

Isn’t this the real question from 1998?

It's shameful to say that during the few days Li Zheng and Shi Yang spent together, they went through all the real test questions of the national finals in the past 20 years. It happened to be 1998, and I don't know if it was a year earlier...

But this one in 1998 was the last one made.

As for this question, although it looks scary, it remains true to its origin.

It's still the same process of leaching, filtration, transformation, and drying. It's so easy to dissolve and filter.

If I remember correctly, I achieved a yield of 83% at that time, while Shi Yang’s was 92%.

The subsequent titration and purity tests were also very routine, and I went through them without yawning.

Now when I try this question again, it’s really hard to make a mistake...

In addition, after all the crazy fights with Wu Shu and Ou Xingzhuo in the past two days, Li Zheng felt a little embarrassed now that his hand was feeling hot.

But even though he was so confident, he still didn't dare to be careless. Before taking action, he went through the entire process in his mind as usual, trying to find dangerous steps.

Well, not really.

There's nothing left to think about, let's get started.

While Li Zheng was waiting, he glanced around the examination room from time to time. He was not curious about other people's progress, but simply anxious about something.

He could also see clearly that this assessment was much more serious than the first time. There was an examiner behind every four students, watching and recording every step of the candidates in real time.

As the examiner, Hu Zengwu did not receive any special treatment this time. He patrolled the entire examination room and gave some information to the examiner from time to time.

Now it seems that in such a serious exam, there is a high probability that he will not make any mistakes.

During the next exam, some people broke the reagent bottles, some left the exam early, some did it forcefully, and some were in a daze.

Those who take advantage of the situation and enter the training camp will probably be unable to hold on any longer.

About half of the top twenty people are relatively stable.

Of course, none of them are as stable as Li Zheng.

At 1 hour and 50 minutes, Li Zheng stood up steadily and submitted all the products and reports to the examiner behind him.

This male examiner is very young, most likely a graduate teaching assistant. After receiving the report and several products, he quickly filled out the score sheet, nodding repeatedly during the process: "Okay, it's fast and stable, and the operation points are not deducted. Come on, national finals."

Bar."

The people around him secretly scolded Li Zheng for being such a jerk, while hurrying up to experiment.

Li Zheng looked at the painful expressions of his classmates.

Gradually realize.

unconsciously.

Step by step, I have become the most annoying person in my life.

That is Lin Yujing.

Only then did he understand Lin Yujing's distress.

The true meaning of YU.

There is no way, friends...

I don't want to do it so quickly either.

But my strength doesn’t allow it.

Just as Li Zheng was packing his things and preparing to go out, Shen Yiyun suddenly rushed in quickly.

Not running, but rushing.

She rushed all the way to Hu Zengwu's side and grabbed the podium to stop. She was obviously out of sorts. She was obviously whispering to Hu Zengwu, but it spread throughout the classroom.

"Shi Yang! Shi Yang is here with a hanging bottle!"
Chapter completed!