689

6013

- Option : A
- Explanation : (A) When a body falls freely, the potential energy due to its height converted into kinetic energy due to its motion.

3. Heat energy of an object is

6015- Option : B
- Explanation : (B) Heat energy or thermal energy of an object is the total thermal kinetic energy and thermal potential energy of all its atoms and molecules. So, we can say that heat energy of an object is the total energy of the molecules of the object

4. Rocket works on the principle of conservation of

6022- Option : C
- Explanation : (C) A rocket works by expelling gases from one end at a very high speed which inturn, upthrust the rocket. This illustrates law of conservation of momentum.

6028

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- Alankar (अलंकार)
- Kaarak कारक
- Kriya ( क्रिया)
- Muhavare and Lokoktiyan (मुहावरे और लोकोक्तियाँ)
- one word substitution (अनेक शब्दों के लिए एक शब्द)
- Paryayvachi Shabd (पर्यायवाची शब्द)
- Samaas-(समास)
- Sandhi संधि
- Tatsam Tadbhav -तत्सम और तद्भव शब्द
- Unseen Pessage 1 ( अपठित गद्यांश और पद्यांश )
- Unseen Pessage 2 ( अपठित गद्यांश और पद्यांश )
- Upsarg and Pratyay उपसर्ग और प्रत्यय (Prefix and Suffix)
- Vaachan (हिन्दी वाचन)
- Vilom Shabd विलोम शब्द ( Antonyms )
- Vyakaran (हिन्दी व्याकरण)

Practice Quiz