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 To Dwonload Pdf of Osb India Class 10 Math and Science Pdf Free  CLICK HERE Subscribe Our Youtube Channel- Osb India class 10 sample paper 2021 science term 1 with answer Sheet

आज दोपहर 12 बजे के बाद किसी भी समय सीबीएसई अपनी रिजल्ट जारी कर सकती है यह जानकारी सीबीएसई ने ट्विटर के माध्यम से दिया है। हमारा संस्थान  सभी छात्रों के अच्छे परिणाम की कामना करते हैं।  रिजल्ट देखने के लिए  यहाँ क्लिक करें(रिजल्ट इसी वेबसाइट पर जारी होंगे)।  तो अपना रोल नंबर निकाल लें।  cbse class 10th result decleared, today, cbse class 10th result 2021

1. One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is: a) Hydrochloric acid b) Tartaric acid c) Acetic acid d) Sulphuric acid. 2. Which of the following will turn phenolphthalein pink? a) NaOH b) HCl c) CH 3 COOH d) H 2 O 3. The compound formed during electrolysis of brine is: a) Cl2 b) H2 c) NaOH d) NaH 4. A teacher gave two test tubes – one containing water and the other containing sodium hydroxide solution to two students. Then he asked them to identify the test tube containing sodium hydroxide solution. Which one of the following can be used for correctly identifying the test tube containing the solution of sodium hydroxide? a) Blue litmus b) Red litmus c) Sodium carbonate solution d) Dilute HCl 5. To relieve pain caused due to acidity, we can take : a) sour milk b) lemon juice c) orange juice d) milk of magnesia 6. You are given four unknown solutions I, II, III, and IV. The pH values of these solutions are found ...

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  Heat - Heat is the form of energy which sensation of hotness and coldness Temperature- Temperature is the measurement of average energy of molecular motion in a substance.   Heat transfer- The Energy is flow from higher Temperature body to lower temperature body. Unit of Heat- SI unit of Heat is Joule Calorie- It is a traditional unit of Heat. One Calorie is defined as the amount of heat required to raise the temperature if 1 g if water by 1 Degree Celsius.   Note- 1 Joule= 0.24 Calorie Effect of Heat 1. Change in temperature 2. Change in state of matter   Evaporation The change of a substance from the liquid state to its gaseous state by absorbing heat from the surrounding at any temperature below its boiling point is called evaporation. Factor affecting Evaporation   1. Surface area 2. Temperature of surrounding 3. Temperature of the substance 4. Nature of liquid 5. Wind Speed 6. Humidity     Boiling- The proce...

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