
Indicatori chimici și reacții acide
Authored by Mihailuta Alexandra
Chemistry
8th Grade

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Conform hârtiei de pH universal prezentate, ce interval de pH indică un mediu acid?
De la 1 la 7
De la 7 la 14
Doar 7
De la 8 la 14
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ce sunt indicatorii chimici?
Substanțe care accelerează reacțiile chimice.
Substanțe care arată caracterul acid sau bazic al unei soluții.
Substanțe folosite pentru a măsura temperatura.
Substanțe care se dizolvă în apă.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ce culoare capătă turnesolul în prezența unui acid, cum ar fi acidul clorhidric?
Violet
Albastru
Roșu
Incolor
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cum reacționează fenolftaleina atunci când este adăugată într-o soluție acidă?
Devine roșie.
Devine albastră.
Rămâne incoloră.
Devine portocalie.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ce culoare indică metil orange-ul în prezența unei soluții acide?
Portocaliu
Galben
Roșu
Verde
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