Chemistry, 14.12.2021 18:50, lilblackbird4
Under what conditions the interaction - chlorine + hydrogen = hydrogen chloride takes place with an explosion:
A: when stirring;
B: in the cold;
C: at maximum contact and in the dark;
D: at maximum contact and direct sunlight?
Task 2: In separate cups are placed a teaspoon of the substances salt, sugar, flour and baking soda. They are covered with vinegar. Which of the substances will interact with the vinegar at room temperature?
?
3: Under what conditions hydrogen and oxygen are obtained from water;
A: at room temperature
B: when cooling
C: in the dark
D: when an electric current flows?
4: Which of the following changes is not a sign of a chemical reaction:
A: Heat release
B: Stirring;
C: Light releasing
D: Dissolving sludge?
Answers: 1
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