When vinegar is mixed with sodium carbonate, carbon dioxide gas is produced., True ✔, false x, The balloon inflates because of the accumulation of the produced gas inside it., True ✔, false x, This experiment indicates that a chemical reaction has occurred., True ✔, false x, A catalyst increases the rate of a chemical reaction, True ✔, false x, Hydrogen peroxide decomposes and releases oxygen gas., True ✔, false x, Potassium permanganate has no effect on the reaction rate, True ✔, false x, Oil floats on water because it is less dense than water., True ✔, false x, Oil mixes with water to form a homogeneous solution, True ✔, false x, Effervescent tablets produce gas bubbles when they come into contact with water, True ✔, false x, The movement of bubbles in the oil resembles the movement of lava, True ✔, false x

science activity

podle
Tisk
Vložit

Výsledková tabule/Žebříček

Vizuální styl

Možnosti

Přepnout šablonu

Obnovit automatické uložení: ?