Kinetics
1. A student performs two reactions and measures the rate of product formation.
Reaction 1: 1.5 g of solid calcium carbonate is added to 100 cm3 of 0.5 mol dm-3 hydrochloric acid.
Reaction 2: 100 cm3 of distilled water is added to 100 cm3 of 0.5 mol dm-3 hydrochloric acid and then 1.5 g of solid calcium carbonate is added.
The rate of reaction 1 was faster than the rate of reaction 2.
Which of the following 3 hypotheses correctly describes the difference in the rate as a result of adding water?
Frequency of collisions between reactant molecules is reduced | Proportion of effective collisions between reactant molecules is reduced | Proportion of reactant molecules possessing the activation energy is reduced | |
A | ⨯ | ⨯ | ✓ |
B | ✓ | ✓ | ⨯ |
C | ✓ | ⨯ | ⨯ |
D | ✓ | ✓ | ✓ |
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
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