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کنکور زیست و شیمی تبریز - تست شماره 5 شیمی
کنکور زیست و شیمی تبریز
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شمار اتمهای هیدروژن اسیدی در مولکول کدام ترکیب بیشتر است؟

1- تری کلرواتانوییک اسید

2- سدیم هیدروژن سولفات

3- اگزالیک اسید

4- 2-پروپانول



پاسخ :

1-نادرست،  تری کلرواتانوییک مثل اتانوییک اسید (استیک اسید) یک هیدروژن اسیدی دارد. هر چند بعلت خاصیت کشندگی کلر، اسید قویتری از اتانوییک اسید است

2-نادرست،  هیدروژن سولفات یک هیدروژن اسیدی دارد که برای آنهم ثابت اسیدی تعریف میشود یعنی اسید خیلی قوی نیست.

3درست،  اگزالیک اسید یک کربوکسیلیک اسید دو عاملی است ( دو گروه کربوکسیل دارد) پس دو هیدروژن اسیدی دارد

4نادرست،  2-پروپانول یک الکل نوع دوم است که هیدروژن گروه هیدروکسیل میتواند با فلزات جایگزین شود، پس یک هیدروژن اسیدی دارد.





نوع مطلب : جزوه شیمی، نمونه سوال شیمی ، کنکور، شیمی، تقویتی تبریز، تدریس خصوصی تبریز، كنكور شیمی تبریز، تقویتی شیمی تبریز، 
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