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1

answers

1146

views

लोहे को जंग से बचाने के दो उपाय बताइए। Mention two ways to protect iron from rusting.

Chemistry
asked 2 years ago
B Butts

1

answers

1290

views

पीतल या ताँबे के बरतनों में दही एवं खट्टे पदार्थ क्यों नहीं रखने चाहिए ? Why curd and sour substances should not be kept in brass or copper vessels?

Chemistry
asked 2 years ago
B Butts

1

answers

662

views

आयनिक यौगिकों के गलनांक उच्च क्यों होते हैं ? Why do ionic compounds have high melting points?

Chemistry
asked 2 years ago
B Butts

1

answers

1236

views

समूह में ऊपर से नीचे की ओर जाने पर इलेक्ट्रॉन ग्रहण करने की प्रवृत्ति कैसे परिवर्तित होगी ? How will the tendency to accept electrons change as we move from top to bottom in a group?

Chemistry
asked 3 years ago
B Butts

1

answers

1012

views

धातु किसे कहते हैं ? What is Metal?

Chemistry
asked 2 years ago
B Butts

1

answers

1439

views

श्वसन को ऊष्माक्षेपी अभिक्रिया क्यों कहते हैं ? वर्णन कीजिए। Why is respiration called an exothermic reaction? Describe.

Chemistry
asked 2 years ago
B Butts

1

answers

1754

views

इलेक्ट्रॉन बंधुता क्या है ? What is electron affinity?

Chemistry
asked 3 years ago
B Butts

1

answers

3204

views

साबुन तथा अपमार्जक में अंतर स्पष्ट करे ? Explain the difference between soap and detergent?

Chemistry
asked 3 years ago
B Butts

1

answers

936

views

क्या श्वसन एक ऊष्माक्षेपी अभिक्रिया है ? इसे स्पष्ट कीजिए। Is respiration an exothermic reaction? Explain it.

Chemistry
asked 2 years ago
B Butts

1

answers

1233

views

वियोजन अभिक्रिया को संयोजन अभिक्रिया के विपरीत क्यों कहा जाता है ? Why is a decomposition reaction called the opposite of a combination reaction?

Chemistry
asked 2 years ago
B Butts

1

answers

1361

views

फुलेरीन में उपस्थित कुल कार्बन की संख्या बताइये ? What is the total number of carbon present in fullerene?

Chemistry
asked 3 years ago
B Butts

1

answers

1186

views

समूह में इलेक्ट्रॉन त्यागने की प्रवृत्ति किस तरह बदलती है ? How does the tendency to lose electrons change in a group?

Chemistry
asked 3 years ago
B Butts

1

answers

1534

views

क्षारक क्या है ? What is alkali?

Chemistry
asked 2 years ago
B Butts

1

answers

1340

views

उत्प्रेरक से आप क्या समझते हैं ? What do you understand by catalyst?

Chemistry
asked 2 years ago
B Butts

1

answers

781

views

एथनॉइक अम्ल के भौतिक गुण धर्मों को लिखें। Write the physical properties of ethanoic acid.

Chemistry
asked 3 years ago
B Butts

1

answers

1490

views

अम्ल का जलीय विलयन क्यों विद्युत का चालन करता है? Why does an aqueous solution of an acid conduct electricity?

Chemistry
asked 2 years ago
B Butts

1

answers

772

views

अपमार्जक किसे कहते हैं ? संश्लिष्ट अपमार्जक की संरचना बताइए। इसका प्रमुख लाभ लिखिए। Who are the detractors? State the structure of a synthetic detergent. Write its main advantage.

Chemistry
asked 2 years ago
B Butts

1

answers

2594

views

ब्लीचींग पाउडर बनाने की विधि एवं उपयोगिता लिखें। Write the method and utility of making bleaching powder.

Chemistry
asked 2 years ago
B Butts

1

answers

885

views

ऐलुमिनियम के उपयोग बताएँ। State the uses of aluminum.

Chemistry
asked 2 years ago
B Butts

1

answers

899

views

अधातु के दो गुणधर्मों को लिखें। Write two properties of non-metals.

Chemistry
asked 2 years ago
B Butts

1

answers

694

views

रासायनिक अभिक्रिया से क्या समझते हैं ? What do you understand by chemical reaction?

Chemistry
asked 2 years ago
B Butts

1

answers

772

views

धातुओं के दो रासायनिक गुणों को लिखें। Write two chemical properties of metals.

Chemistry
asked 2 years ago
B Butts

1

answers

1425

views

योगिक और मिश्रण में अंतर स्पष्ट करे ? Explain the difference between a compound and a mixture?

Chemistry
asked 3 years ago
B Butts

1

answers

1213

views

लवण क्या है? What is salt?

Chemistry
asked 2 years ago
B Butts

1

answers

1226

views

तेल एवं वसायुक्त खाद्य पदार्थों को नाइट्रोजन से प्रभावित क्यों किया जाता है ? Why are oily and fatty foods affected by nitrogen?

Chemistry
asked 2 years ago
B Butts

1

answers

873

views

आवर्त में बायीं से दायीं ओर जाने पर परमाणु त्रिज्या क्यों घटती है ? Why does the atomic radius decrease from left to right in a period?

Chemistry
asked 3 years ago
B Butts

1

answers

1264

views

क्या कारण है कि ग्रेफाइट विद्युत् का सुचालक है ? What is the reason that graphite is a good conductor of electricity?

Chemistry
asked 2 years ago
B Butts

1

answers

1597

views

खनिज और अयस्क क्या हैं ? लोहे के दो अयस्कों के नाम उनके आणविक सूत्र के साथ लिखें । What are minerals and ores? Write the names of two ores of iron along with their molecular formulas.

Chemistry
asked 2 years ago
B Butts

1

answers

814

views

आघातवर्ध्यता से क्या समझते हैं ? What do you understand by trauma?

Chemistry
asked 2 years ago
B Butts

1

answers

619

views

कार्बन के दो गुण-धर्म कौन-से हैं जिनके कारण हमारे चारों ओर कार्बन यौगिकों की विशाल संख्या दिखाई देती है ? What are the two properties of carbon due to which the vast number of carbon compounds are visible around us?

Chemistry
asked 3 years ago
B Butts

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