1. ❓Chemistry questions❔
❓Chemistry questions❔
English
متوسط
Chemistry, Structure of the atom, Periodic classification of the element, Chemical bonding and inter molecular forces, Chemical reactions and stoichiometry
تگ‌ها
30
سوال‌
‏1 دقیقه
به ازای سوال
8:05
زمان متوسط
4.0
امتیازات مسابقه
1.5
رتبه‌بندی جامعه
26
شرکت‌کننده
آزمون را شروع کنید
7 نظر
Smart Tiger داور
1. Basic Explanations. Explanations expand the correct answer.
Giant Elk داور
This test may have a higher chance of receiving a reward. Nominated for:

Educational explanations. 👍 Explanations cover why the correct answers are correct and why the wrong answers are wrong (when appropriate). E.g.: #q1, #q2, #q30
Hardy Swan
Are you serious?? Many of the explanations simply repeat the correct answers or expand the correct answers! Some of them sound even not related to the explanation of the answer! There are very few explanations clearly explaining why the correct answers are correct! And there are very indistinct and few explanations of the wrong answers! Why are you lying??? And there are also a lot of English mistakes! I'm pretty sure that you do not know anything about chemistry! Or you know the owner! You have to be fair! Why are you even a judge if you cannot simply be fair??
Sweet Goose
29. Which of the following changes is not the characteristics of chemical change?
– New substance is formed
– Alters composition of substances
– Energy is absorbed or released
– Easily reversed
There are some chemical changes which are easily reversed. For example: Nh3+ HCl is easily reversed reaction.
Sweet Goose
https://www.bbc.co.uk/bitesize/guides/z7r7xfr/revision/1
Sweet Goose
14. Which of the following is the correct increasing order of the atomic size of the elements Mg, B, K, Cl, and C? (Z, Mg = 12, B = 5, L = 6, K = 19, Cl = 17). Here is a typo. Instead of L should be C
Sweet Goose
https://en.wikipedia.org/wiki/Periodic_table
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