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NCERT Solutions for Class 8 Science Chapter 4 Combustion and Flame Question 1: List conditions under which combustion can take place. दहन की परिस्थितियों की सूची बनाइए। Answer The conditions required for combustion to take place are: (a) Presence of a fuel (b)  Air (or oxygen) (c)  Ignition temperature. दहन की परिस्थितियाँ: (a) एक दाह्य पदार्थ या ईंधन, (b) ऑक्सीजन, (c) ज्वलन ताप Question 2: Fill in the blanks. (a) Burning of wood and coal causes _______ of air. (b) A liquid fuel, used in homes is  ________ . (c) Fuel must be heated to its _______ before it starts burning. (d) Fire produced by oil cannot be controlled by ______. रिक्त स्थानों की पूर्ति कीजिए (a) लकड़ी और कोयला जलने से वायु का ............ होता है। (b) घरों में काम करने वाला एक द्रव ईंधन ............. है। (c) जलना प्रारंभ होने से पहले ईंधन को उसके ........... तक गर्म करना आवश्यक है। (d) तेल द्वारा उत्पन्न आग को .............. द्वारा नियंत्रित नहीं किया जा सकता। Answer (a) pollution; (b) LPG; (c) ignition tem...

NCERT Solutions for Class 6 SST Chapter 6 The Beginnings of Indian Civilisation भारतीय सभ्यता का प्रारंभ  Page No. 85 | पेज न. 85  Question 1: What is a civilisation?  सभ्यता क्या है? Answer A civilisation is used for an advanced stage of human societies. It generally includes characteristics such as: (1) some form of government and administration to manage a more comple society and its manyy activities; (2) urbasism - town-planning, the growth of cities and their management, which generally includes water management and a drainage system; (3) a veriety of crafts; (4) trade; (5) some form of writing.  सभ्यता का उपयोग मानव समाज के उन्नत चरण के लिए किया जाता है। इसमें आम तौर पर निम्नलिखित विशेषताएं शामिल होती हैं: (1) शासन और प्रशासन का कोई रुप जटिल समाज और उसके अनेक कार्यकलापों के प्रबंधन हेतु।  (2) नगरीकरण - नगर योजना, नगरों का विकास और उनका प्रबंधन, जिसमें सामान्यत: जल प्रबंधन और जल निकास व्यवस्था आती है।  (3) विभिन्न प्रकार के शिप।  (4) व्यापार...

NCERT Solutions for Class 8 English Poem The Last Bargain Question 1: Who is the speaker in the poem? Answer: A man looking for his employer is the speaker. Question 2: "The king, sword in the hand" suggests (i) wealth (ii) power (iii) more power than wealth Mark the appropriate item in the context of stanza 1. Answer: (ii) Power Question 3: The old man offered the speaker a lot of money. Why did he turn down the offer? Answer: The man didn't need money. He valued his freedom more than becoming a slave for gold. Question 4: Find in the poem, lines that match the following. Read both one after another. (i) I have nothing to give you except goodwill and cheer. (ii) Her happiness was no more than sorrow in disguise. (iii) The king’s might was not worth much. Answer: (i) “I hire you with nothing.” (ii) “Her smile paled and melted into tears.” (iii) “But his power counted for naught.” Question 5: How did the speaker feel after talking to the child on the beach? Answer: When th...

NCERT Solutions for Class 6 Science Chapter 4 Exploring Magnets   (Page 62) Question 1. Do magnets stick to objects made of certain materials only? क्या चुंबक केवल कुछ विशेष पदार्थों से बनी वस्तुओ पर ही चिपकते हैं? Answer: (i) Yes, magnet attracts certain materials whereas some do not get attracted towards magnet.  (ii) The materials which get attracted towards a magnet are magnetic e.g. iron, nickel, cobalt etc. (iii) The materials which are not attracted towards a magnet are non-magnetic, e.g. aluminium, brass, copper, gold, etc.  (i) हाँ, चुम्बक कुछ पदार्थों को अपनी ओर आकर्षित करता है जबकि कुछ पदार्थ चुम्बक की ओर आकर्षित नहीं होते। (ii) जो पदार्थ चुम्बक की ओर आकर्षित होते हैं वे चुम्बकीय होते हैं, जैसे लोहा, निकल, कोबाल्ट आदि। (iii) जो पदार्थ चुम्बक की ओर आकर्षित नहीं होते वे अचुम्बकीय होते हैं, जैसे एल्युमीनियम, पीतल, तांबा, सोना आदि।

NCERT Solutions for Class 6 SST Chapter 3 Landforms and Life स्थलरूप एवं जीवन  Question 1: What are the major types of landforms and their significance to life and culture? स्थलरूपों के प्रमुख प्रकार कौन-से है और जीवन तथा संस्कृति के लिए इनका क्या महत्त्व है? Answer The major types of landforms are the mountains, the plateaus and the plains. (i) Mountains : Mountains are the landforms that are much higher than the surrounding landscape. They can be recognised by a broad base, steep slopes and a narrow summit. Depending on their height, some mountains are covered with snow. (ii) Plateaus : A plateaus is a landform that rises up from the surrounding land and has a more or less flat surface; some of its sides are often steep slopes. Tibetan Plateau is the largest and highest plateau in the world. (iii) Plains : Plains are landforms that have an extensive flat or gently undulating surface. They do not have any large hills or deep valleys. They are generally not more than 300 metres abo...

NCERT Solutions for Class 8 Science Chapter 3 Coal and Petroleum Question 1: Make a list of various materials used by us in daily life and classify them as natural and man-made materials (Refer to Activity 5.1). Answer Question 2: Does this list include air, water, soil and minerals? Answer: Yes, this list contains, air, water, soil and minerals. Question 3: Can we use all our natural resources forever? Answer No, we cannot use all our natural resources forever, because these are going to exhaust one day. Question 4: Can air, water and soil he exhausted by human activities? Answer No, these can not be exhausted at all. Question 5: Is water a limit less source? Answer Yes, water is a limitless source, but by unwise use and cutting of trees, sources of water can be finished. Question 6: What are the advantages of using CNG and LPG as fuels? Answer The advantages of using CNG and LPG:         (i) CNG and LPG are clean fuels.         (ii) Their cost i...