Li Zheng hurriedly rubbed his face and ignored the two of them. After writing his name and examination number, he began to examine the questions.

At this time, he had no intention of enabling double speed. Based on experience, he did not need to enable it.

Secondly, the examination room was overcrowded, the invigilation was strict, and the speed of doing the questions was too exaggerated and inappropriate.

In short, although the two perverts, one on the left and one on the right, are annoying to death.

Li Zheng's road to competition can be considered the beginning.

At the same time, this is also the first time to fight Lin Yujing at the top of the Forbidden City.

Although it was not an examination room, Li Zheng could still imagine Lin Yujing's feeling of debt and pain.

Just like Ximen Chuixue, what he thinks about day and night is Lord Ye's move to fly out of nowhere.

Let's begin the final showdown with all our strength.

After clearing away his distracting thoughts, Li Zheng first took a rough sweep of the roll.

The difficulty level has dropped slightly compared to last year, but there are very few score questions.

Let everyone work hard, this is a good trend.

Pick up the pen and start killing!

The first major question, as usual, is to write a reaction based on conditions, four small questions, a total of 8 points.

[1-1: Silicon nitride can be used as the matrix material of LED. It can be produced by reacting sih4 with ammonia gas by plasma method]

Well, that's it. It's one of the rare questions to get points. Just see the result directly for silicon nitride. Just pay a little attention to the positive and negative valence, and do brainless balancing.

3sih4+4nh3si3n4+12h2↑

Next, the three equation questions were solved like water. This intensity was just enough to warm up.

Li Zheng's mentality gradually stabilized.

This paper is just prepared as an ordinary exam, nothing special.

Thinking back to the way he scratched his head and scratched his head when doing the competition questions for the first time, he even wanted to laugh.

We have come step by step, and to this day, when we look back at those peaks that once made us despair, they are nothing more than that.

The second major question, the structure question, has the same 4 questions, totaling 8 points.

[2-1: 195k, phosphorus trioxide reacts with ozone in dichloromethane to form p4o18. Draw a schematic diagram of the structure of the p4o18 molecule. 】

This question is a little troublesome and needs some analysis.

Work steadily, be optimistic about the reaction conditions, analyze the reaction process step by step, and finally the structural diagram of p4o18 will naturally come out.

First of all, 195k refers to the reaction temperature, which is approximately -78c.

It can be seen from this that the reaction medium is very inert...

According to the structure of p2o3, there is a lone pair of electrons on p, and the resonance structural formula of o3 is...

…

The first two questions were passed like water.

The last two questions were about rubber organisms, and the test was actually about the bio-rubber that is the designated ball for the World Cup.

interesting.

Although he doesn't understand football, Li Zheng knows rubber very well.

In the process of speculating on the structure, we only encountered one super-point, but as long as we combine the "kick-resistant" characteristics of football, it is easy to make a choice.

…

Starting from the third question, it is a big question worth 12 points.

A real guy who widens the gap.

This first real guy made Li Zheng very happy.

This is the title commemorating the 150th anniversary of Mendeleev's discovery of the periodic table of elements.

It's about Mendeleev predicting various elements, including a.

The sulfide of a is treated at 800c in nitrogen to produce b.

After heating up and injecting ammonia gas, red compound c was produced.

So what if c... produced d and e.

When e meets water, it will produce d...and how can d produce b?

Based on this series of conditions, we can infer what abcde is.

This is Li Zheng’s favorite inference question. It not only tests chemistry accumulation in all aspects, but is also full of logical charm.

Doing this kind of problem gives you a feeling of solving a puzzle.

Long live Mendeleev.

The fourth major question, the difficulty of the college entrance examination, is like water.

The fifth major question, the element question, mineral information, isotope dating, was devoted to it, and then got started.

…

In fact, while they were working on the questions, two teachers from No. 4 Middle School, a boy and a girl, were also busy.

It was a big weekend and I was summoned to invigilate the exam, which was originally very irritating.

But looking at these anxious students, they felt a little more comfortable.

And I found something fun to do.

"The third one in the fourth row, I think it's okay." The male teacher whispered.

"It's very stable, but the progress is too slow." The female teacher glanced at the short-haired girl on Li Zheng's right, "This one is stable. She didn't scratch her head from beginning to end, and her expression didn't even change."

"Indeed, most of the candidates are scratching their heads." The male teacher scratched his hair and looked at the area, "When it comes to scratching their heads, none of the three people in this row seem to have scratched their heads. They are from our school.

What?"

"No, this examination room does not exist in our school."

While they were chatting, Li Zheng, who they had just praised for being very stable, suddenly stared and raised his hands with a "whoosh".

The male teacher hurriedly came over and asked with concern: "What's wrong, your stomach feels uncomfortable?"

The misunderstanding of the male teacher is certainly not his fault. People who are not familiar with Li Zheng usually think of diarrhea when they see him raising his hand.

Li Zheng pointed at the scroll and whispered: "Here, using the lutetium-hafnium method for dating, the natural isotopes of lutetium are only 175 and 176, but the question mentioned 176 and 177, which makes the second question impossible to calculate.

Please tell me, teacher."

The male teacher frowned.

"Classmate...I don't teach chemistry either..."

"In such a big examination room, there should be a Jijing Chemistry Society, right?" Li Zheng asked.

"Yes, yes..." The male teacher looked around and hesitated.

Competition questions are all written by university professors, and mistakes are very rare.

Even if something really goes wrong, more students will report it.

Is it possible that this kid is the fastest one in this examination room?

The male teacher couldn't help but look at Li Zheng again.

This fashionable outfit and fluffy hairstyle.

It looks like he is not studying well.

It is really inappropriate to report based on his one-sided words.

But you can't judge a book by its appearance. What if he is really the most demonic one in the entire examination room?

The male teacher asked: "Classmate, which school are you from?"

"Sakura Lake."

"Yinghu Lake? Isn't it a park?" The male teacher looked confused.

"..."

At this time, the female teacher also came over: "I know Yinghu Middle School...the key points in the district..."

"It has nothing to do with my school." Li Zheng pointed to the paper and said, "177lu/177hf, this isotope sample is not valid, it should be 176lu/177hf."

After the male and female teachers looked at each other, the male teacher said bravely: "In this way, you can do the next questions first. If there are still others who report it, we will report it to the top."

"It must be wrong, no need to wait." Li Zheng had no choice but to shake his head and look directly at the sixth question.

The male and female teachers breathed a sigh of relief and walked back to the podium.

"Is there really a Yinghu Middle School?" the male teacher asked.
To be continued...