CHAPTER-4 Carbon and its Compounds Short Answer Questions QUESTION-54 SOLUTION a) Ethene is formed when ethanol is heated at 443 K with excess of concentrated sulphuric acid. b) Propanol is treated with alkaline Potassium permanganate or acidified Potassium-di-chromate to obtain propanoic acid.
CLASS-10 SCIENCE Q-38
CHAPTER-4 Carbon and its Compounds Short Answer Questions QUESTION-38 SOLUTION When ethanol reacts with sodium it gives Sodium ethoxide with the liberation of Hydrogen gas.2CH₃- CH₂-OH +2Na——>2 CH₃- CH₂- ONa + H₂
CLASS-10 SCIENCE Q-23
CHAPTER-4 Carbon and its Compounds Multiple Choice Questions QUESTION-23 23. Which of the following is not a straight chain hydrocarbon? SOLUTION Answer is d)
CLASS-10 SCIENCE Q-12
CHAPTER-2 Acids, Bases and Salts Multiple Choice Questions QUESTION-12 SOLUTION Answer is (b) tartaric acid Explanation:A Mild edible acid along with Sodium Hydrogen Carbonate is used to prepare baking powder. Here acetic acid or citric acid can also be used in place of tartaric acid.
CLASS-10 ECONOMICS Q-1
CHAPTER-2 SECTORS OF THE INDIAN ECONOMY QUESTION-1 Let’s Work these Out-Pg-31Q.1 Look at the following examples. Which of these are unorganizedsector activities?(i) A teacher taking classes in a school.(ii) A head load worker carrying a bag of cement on his back in a market.(iii) A farmer irrigating her field.(iv) A […]
CLASS-10 SCIENCE Q-37
CHAPTER-1 Chemical Reactions and Equations Short Answer Questions QUESTION-37 SOLUTION Zinc is more reactive than copper as Zinc is placed above Hydrogen and Copper is placed below hydrogen in theactivity series of metals. Because of this Zinc reacts with HCl whereas Copper will not react.
CLASS-10 SCIENCE Q-25
CHAPTER-1 Chemical Reactions and Equations Short Answer Questions QUESTION-25 SOLUTION (a) Na2CO3 + HCl → NaCl + NaHCO3(b) NaHCO3 + HCl → NaCl + H2O + CO2(c) 2CuSO4+4Kl →2K2SO4+CU2I2+I2
CLASS-10 SCIENCE Q-5
CHAPTER-1 Chemical Reactions and Equations Multiple Choice Questions QUESTION-5 SOLUTION Answer is (c) (i) and (iv) Explanation:Exothermic processes will increase the temperature whereas exothermic processes will decrease the temperature.
CLASS-10 CIVICS Q-8
CHAPTER-5 OUTCOMES OF DEMOCRACY QUESTION-8 Q.8 Read the passage below:Nannu is a daily wage earner. He lives in Welcome Mazdoor Colony, aslum habitation in East Delhi. He lost his ration. card and applied for aduplicate one in January 2004. He made several rounds to the local Foodand Civil Supplies office […]
CLASS-10 CIVICS Q-4
CHAPTER-2 FEDERALISM QUESTION-4 Q.4 What is the main difference between a federal form of governmentand a unitary one? Explain with an example. ANSWER: Ans.: Differences between a federal government and a unitarygovernment is as follows:a) In a federal form of government, the central government shares itspowers with the various Constituent […]