catalyst
/ˈkætəlɪst/noun
उच्चारण कैटलिस्ट
उत्प्रेरक
Advanced wordPYP · asked 2 times
Asked in previous papers
as one-word substitution
- 1
[C] chemistry
a substance that makes a chemical reaction happen faster without being changed itself
उत्प्रेरक
- Enzymes act as biological catalysts.
- Platinum is used as a catalyst in the car's exhaust system.
- The scientist added a catalyst to speed up the reaction.
+ 2 more examples
- Without a catalyst, the experiment would take many hours.
- Students learn that a catalyst is not used up in a reaction.
- 2
[C] ~ (for sth)
a person or thing that causes a change
परिवर्तन का कारक
- The book was a catalyst for change.
- The teacher's encouragement was the catalyst for her career in science.
- The protest was the catalyst for new laws on safety.
+ 3 more examples
- His speech acted as a catalyst for reform in the party.
- Technology has been a catalyst for change in rural education.
- The arrival of a new coach proved to be a catalyst for the team's success.
Synonyms stimulus spur trigger impetus motivation
≈Synonyms and antonyms
Synonyms
AaSpelling
cat·a·lyst
With -a-lyst and y (not 'catalist').
-a-lyst और y के साथ ('catalist' गलत है)।
?Which word?
Keep the cause words together: catalyst (causes change), stimulus, trigger (causes a sudden reaction), impetus (a force that makes something happen faster), spur.
कारक के शब्द साथ याद रखिए: catalyst (बदलाव लाने वाला), stimulus, trigger (अचानक प्रतिक्रिया पैदा करने वाला), impetus (कुछ तेज़ कराने वाली शक्ति), spur।
✓In the exam
General knowledge
Science: a catalyst speeds up a reaction without being used up; enzymes are biological catalysts; a catalytic converter reduces harmful gases from vehicles; iron is a catalyst in the Haber process for making ammonia.
विज्ञान में उत्प्रेरक स्वयं खर्च हुए बिना अभिक्रिया तेज़ करता है; एंज़ाइम जैविक उत्प्रेरक हैं; catalytic converter वाहनों से हानिकारक गैसें घटाता है; अमोनिया बनाने की Haber प्रक्रिया में लोहा उत्प्रेरक है।