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In which type of reaction does the catalyst remain unchanged at the end?

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Important Questions on Changes Around Us

HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
Which of the following best describes a chemical reaction based on physical contact?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
What happens when reactants are in a physical state that allows them to be in close contact?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
How does the surface area of reactants affect reactions?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
What does physical contact do in a reaction between two solids?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
What role does a catalyst play in chemical reactions?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
Which of the following is true for most catalytic reactions?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
What is a common characteristic of all catalytic reactions?
MEDIUM
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
When dry wood comes into contact with fire, it burns with the help of oxygen to form _____, which is given out as smoke.
MEDIUM
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
Which of the following is true about a catalytic reaction?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
What is an example of a physical factor that can influence the rate of a chemical reaction?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
What can increase the surface area of a solid reactant in a reaction?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
What is a feature of surface contact in a reaction?
MEDIUM
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
What type of chemical reactions occur due to physical contact?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
How can the rate of reaction be increased in a reaction without using a catalyst?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
In which type of reaction is a catalyst often used to speed up the process?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
What is the primary purpose of using a catalyst in a reaction?
EASY
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
Cotyledons are also called-
EASY
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
Which of the following is a must condition for a chemical reaction to occur?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
What is one key difference between a chemical reaction with a catalyst and one without?
HARD
Science>Chemistry>Changes Around Us>Chemical Reactions Based on Physical Contact
Which of the following is an example of a reaction based on physical contact?