एक छात्र हर बार अलग मात्रा में नमक डालता है लेकिन प्रश्न तापमान के प्रभाव का है। नमक की मात्रा क्या बन गई?
A student uses a different amount of salt each time although the question concerns temperature. What has the salt amount become?
Explanation opens after your attempt
A. एक बाधक चरA confounding variable
Concept
Changing the salt amount may also affect dissolving time. This makes the true effect of temperature unclear.
Why this answer is correct
The correct answer is A. एक बाधक चर / A confounding variable. Changing the salt amount may also affect dissolving time. This makes the true effect of temperature unclear.
Exam Tip
नमक की बदलती मात्रा भी घुलने के समय को प्रभावित कर सकती है। इससे तापमान का वास्तविक प्रभाव अस्पष्ट होगा।
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