Example 1
ما عدد تأكسد الكروم في K₂Cr₂O₇؟
- A+3
- B+6
- C+7
- D+12
Show the solution
Correct answer: B
2(+1) + 2x + 7(−2) = 0 فيكون x = +6.
A skill of Chemistry in اختبار التحصيل الدراسي للتخصصات العلمية. Practise it with explained questions, and review your mistakes until you master it.
Pick your answer, then open the solution to see the right answer and its explanation.
Correct answer: B
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