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single-trial MCQ Questions for Class 9

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3 questions tagged with single-trial.

Question 1/3 Expert Science Exploration: Entering the World of Secondary Science Hypothesis and experimentation Class 9 Level 8

यदि केवल एक परीक्षण में अपेक्षित परिणाम मिला हो तो वैज्ञानिक निष्कर्ष कैसा होना चाहिए?

If the expected result is obtained in only one trial how should the scientific conclusion be stated?

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Correct Answer

D. परिणाम परिकल्पना के अनुरूप है लेकिन पुष्टि के लिए पुनरावृत्ति आवश्यक हैThe result is consistent with the hypothesis but replication is needed for confirmation

Step 1

Concept

A single trial gives limited evidence so replication is needed for a strong conclusion. Distinguish support from proof.

Step 2

Why this answer is correct

The correct answer is D. परिणाम परिकल्पना के अनुरूप है लेकिन पुष्टि के लिए पुनरावृत्ति आवश्यक है / The result is consistent with the hypothesis but replication is needed for confirmation. A single trial gives limited evidence so replication is needed for a strong conclusion. Distinguish support from proof.

Step 3

Exam Tip

एक परीक्षण सीमित प्रमाण देता है इसलिए मजबूत निष्कर्ष के लिए पुनरावृत्ति चाहिए। परीक्षा में समर्थन और प्रमाणित होने में अंतर रखें।

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Question 2/3 Hard Science Exploration: Entering the World of Secondary Science Hypothesis and experimentation Class 9 Level 9

एक छात्र कहता है कि उसकी परिकल्पना सही है क्योंकि एक परीक्षण अपेक्षित परिणाम देता है। सबसे वैज्ञानिक प्रतिक्रिया क्या है?

A student says the hypothesis is correct because one trial gave the expected result. What is the most scientific response?

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Correct Answer

B. एक परिणाम केवल प्रारंभिक समर्थन देता है और पुनरावृत्ति आवश्यक हैOne result gives only preliminary support and repetition is needed

Step 1

Concept

One trial may be influenced by chance or error so repetition is necessary. In exams do not treat one result as absolute proof.

Step 2

Why this answer is correct

The correct answer is B. एक परिणाम केवल प्रारंभिक समर्थन देता है और पुनरावृत्ति आवश्यक है / One result gives only preliminary support and repetition is needed. One trial may be influenced by chance or error so repetition is necessary. In exams do not treat one result as absolute proof.

Step 3

Exam Tip

एक परीक्षण संयोग या त्रुटि से प्रभावित हो सकता है इसलिए पुनरावृत्ति आवश्यक है। परीक्षा में एक परिणाम को पूर्ण प्रमाण न मानें।

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Question 3/3 Expert Science Exploration: Entering the World of Secondary Science Scientific questions and observations Class 9 Level 5

एक छात्र निष्कर्ष लिखता है कि गर्म पानी में चीनी हमेशा जल्दी घुलती है जबकि उसने केवल एक बार जांच की। इस निष्कर्ष की मुख्य कमजोरी क्या है?

A student concludes that sugar always dissolves faster in hot water after only one trial. What is the main weakness of this conclusion?

Explanation opens after your attempt
Correct Answer

A. एक परीक्षण से हमेशा वाला सामान्य निष्कर्ष उचित नहीं हैA universal conclusion is not justified by one trial

Step 1

Concept

One trial may be affected by chance. Conduct several trials before making a general conclusion.

Step 2

Why this answer is correct

The correct answer is A. एक परीक्षण से हमेशा वाला सामान्य निष्कर्ष उचित नहीं है / A universal conclusion is not justified by one trial. One trial may be affected by chance. Conduct several trials before making a general conclusion.

Step 3

Exam Tip

एक परीक्षण आकस्मिक प्रभाव से प्रभावित हो सकता है। निष्कर्ष से पहले कई परीक्षण करें।

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