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experimental planning MCQ Questions for Class 9

experimental planning se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

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3 questions tagged with experimental planning.

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

जीवित प्राणियों पर प्रयोग की योजना बनाते समय कौन-सा सिद्धांत सबसे उचित है?

Which principle is most appropriate when planning an experiment involving living organisms?

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Correct Answer

A. अनावश्यक हानि कम करना और न्यूनतम आवश्यक नमूना लेनाMinimise unnecessary harm and use the minimum adequate sample

Step 1

Concept

Ethical experiments minimise harm and provide appropriate care. In exams consider ethics along with scientific benefit.

Step 2

Why this answer is correct

The correct answer is A. अनावश्यक हानि कम करना और न्यूनतम आवश्यक नमूना लेना / Minimise unnecessary harm and use the minimum adequate sample. Ethical experiments minimise harm and provide appropriate care. In exams consider ethics along with scientific benefit.

Step 3

Exam Tip

नैतिक प्रयोग में हानि कम करने और उचित देखभाल का सिद्धांत अपनाया जाता है। परीक्षा में वैज्ञानिक लाभ के साथ नैतिकता भी देखें।

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

एक छात्र ने आँकड़ों में अपेक्षित प्रवृत्ति न देखकर प्रयोग के बाद नया उद्देश्य लिख दिया। यह अभ्यास वैज्ञानिक रूप से कमजोर क्यों है?

A student rewrote the aim after the experiment when the expected trend was absent. Why is this practice scientifically weak?

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Correct Answer

A. यह परिणाम के अनुसार प्रश्न बदलकर पक्षपात पैदा करता हैIt creates bias by changing the question to fit the result

Step 1

Concept

Changing the aim after seeing results weakens objective experimental planning. In exams keep the original question separate from later interpretation.

Step 2

Why this answer is correct

The correct answer is A. यह परिणाम के अनुसार प्रश्न बदलकर पक्षपात पैदा करता है / It creates bias by changing the question to fit the result. Changing the aim after seeing results weakens objective experimental planning. In exams keep the original question separate from later interpretation.

Step 3

Exam Tip

परिणाम देखकर उद्देश्य बदलना निष्पक्ष परीक्षण की योजना को कमजोर करता है। परीक्षा में मूल प्रश्न और संशोधित व्याख्या अलग रखें।

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

एक छात्र ने प्रयोग की विधि परिणाम देखने के बाद बदल दी और केवल बेहतर परिणाम वाली विधि बताई। इससे क्या समस्या होती है?

A student changed the experimental method after viewing the results and reported only the method giving better results. What problem does this create?

Explanation opens after your attempt
Correct Answer

D. परिणाम आधारित विधि चयन पक्षपातOutcome-based method selection bias

Step 1

Concept

Choosing a method after seeing results can inflate apparent support. Understand the importance of a preplanned method.

Step 2

Why this answer is correct

The correct answer is D. परिणाम आधारित विधि चयन पक्षपात / Outcome-based method selection bias. Choosing a method after seeing results can inflate apparent support. Understand the importance of a preplanned method.

Step 3

Exam Tip

परिणाम देखकर विधि चुनना झूठा समर्थन बढ़ा सकता है। परीक्षा में पहले से निर्धारित विधि का महत्व समझें।

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