What is the chemical formula of baking soda? NaHCO₃1/30The molecular formula for baking soda is .................... . NaHCO32/30Substance used to make hard water soft is .................... . Na2 CO3 .10H2 O3/30Soap is .................... in nature. basic4/30Select the odd one out: Na2SO4, K3PO4, MgBr2, HCl. HCLQuestion Explanation:HCl : Rest all are salts but HCl is an acid. 5/30Molecular formula for magnesium bromide is .................... . MgBr26/30Select the odd one out: Boron-10, Iodine – 131, Cobalt – 60, Iodine – 123. Iodine – 123Question Explanation:Iodine – 123 : It is used in hyperthyroidism while rest are used in treatment of brain tumour. 7/30The molten state of NaCl is also called as .................... . fused state8/30Bleaching powder is also called .................... . calcium oxychloride9/30Salt obtained from certain type of rock is called .................... . rock salt10/30Strong odour in swimming pool is due to .................... . chlorine gas11/30Chlorine gas is a strong .................... agent. oxidizing12/30The .................... % aqueous solution of salt is called brine. 2513/30Rock salt is .................... in colour. brown14/30.................... is known as chloride of lime. Bleaching powder15/30During electrolysis of NaCl in the fused state .................... is formed at cathode. sodium16/30What is the primary component of natural gas? Methane17/30Melting point of NaCl is .................... . 800°C18/30The fixed number of molecules of water in alum is .................... . 2419/30Select the odd one out: Sodium sulphate, Barium chloride, Magnesium sulphate, Bleaching powder. Bleaching powderQuestion Explanation:All others are crystalline salt with water of crystallization while bleaching powder is not. 20/30What is the chemical name of common salt? Sodium chloride21/30Select the odd one out: Na2CO3.10H2O, Na2SO4.10H2O, BaCl2.2H2O, CaOCl2 CaOCl2Question Explanation:CaOCl2 : It is amorphous in nature while rest are crystalline in nature. 22/30Select the odd one out: Soap, Toothpaste, Baking soda, Curd. CurdQuestion Explanation:Curd : It is acidic in nature while others are basic in nature. 23/30Which of the following is a non-metallic element essential for human bone formation? Phosphorus24/30Baking soda is basic25/30Bleaching powder is .................... in colour. yellowish white26/30Which gas is released during the process of photosynthesis? Oxygen27/30Which substance is commonly used as a disinfectant in swimming pools? Bleaching powder28/30NaHCO3 is also called as .................... . sodium bicarbonate29/30Select the odd one out: Strontium – 89, Strontium – 90, Radium – 223, Iodine – 123. Iodine – 123Question Explanation:Iodine – 123 : It is used to cure hyperthyroidism while others are used to cure bone cancer 30/30PrevNext Class 9 | Substances in Common Use 1 / 30 Which of the following is a non-metallic element essential for human bone formation? Calcium Iron Sodium Phosphorus 2 / 30 Select the odd one out: Strontium – 89, Strontium – 90, Radium – 223, Iodine – 123. Strontium – 89 Iodine – 123 Strontium – 90 Radium – 223 Iodine – 123 : It is used to cure hyperthyroidism while others are used to cure bone cancer 3 / 30 The molecular formula for baking soda is ……………….. . NaHCO3 Na2 SO4 Na2 CO3 NaNO3 4 / 30 Melting point of NaCl is ……………….. . 600°C 800°C 100°C 400°C 5 / 30 Which gas is released during the process of photosynthesis? Oxygen Nitrogen Carbon dioxide Hydrogen 6 / 30 Strong odour in swimming pool is due to ……………….. . impurities calcium carbonate chlorine gas calcium hydroxide 7 / 30 Select the odd one out: Sodium sulphate, Barium chloride, Magnesium sulphate, Bleaching powder. Sodium sulphate Barium chloride Magnesium sulphate Bleaching powder All others are crystalline salt with water of crystallization while bleaching powder is not. 8 / 30 Select the odd one out: Boron-10, Iodine – 131, Cobalt – 60, Iodine – 123. Iodine – 123 Boron-10 Cobalt – 60 Iodine – 131 Iodine – 123 : It is used in hyperthyroidism while rest are used in treatment of brain tumour. 9 / 30 Substance used to make hard water soft is ……………….. . Na2 CO3 .10H2 O NaCO3 .10H2 O Na2 CO3 .H2 O NaCO3 .H2 O 10 / 30 During electrolysis of NaCl in the fused state ……………….. is formed at cathode. butyric acid sodium oxygen oxalic acid 11 / 30 The molten state of NaCl is also called as ……………….. . gaseous state semi-solid fused state solid state 12 / 30 ……………….. is known as chloride of lime. Sodium bicarbonate Sodium chloride Calcium carbonate Bleaching powder 13 / 30 Select the odd one out: Na2SO4, K3PO4, MgBr2, HCl. Na2 SO4 HCL MgBr2 K3 PO4 HCl : Rest all are salts but HCl is an acid. 14 / 30 Which substance is commonly used as a disinfectant in swimming pools? Vinegar Hydrogen peroxide Bleaching powder Baking soda 15 / 30 Bleaching powder is ……………….. in colour. yellowish white greenish blue pinkish brown brownish red 16 / 30 NaHCO3 is also called as ……………….. . sodium bicarbonate sodium carbonate sodium carbon oxide sodium chloride 17 / 30 The fixed number of molecules of water in alum is ……………….. . 7 24 2 10 18 / 30 Select the odd one out: Soap, Toothpaste, Baking soda, Curd. Soap Toothpaste Baking soda Curd Curd : It is acidic in nature while others are basic in nature. 19 / 30 What is the chemical name of common salt? Magnesium sulfate Potassium nitrate Sodium chloride Calcium carbonate 20 / 30 Rock salt is ……………….. in colour. blue brown black white 21 / 30 What is the primary component of natural gas? Butane Propane Methane Ethane 22 / 30 Salt obtained from certain type of rock is called ……………….. . stone salt hard salt pure salt rock salt 23 / 30 Soap is ……………….. in nature. basic acidic neutral fuming 24 / 30 Bleaching powder is also called ……………….. . calcium oxalate calcium oxychloride calcium hydroxide calcium oxygen chlorine 25 / 30 The ……………….. % aqueous solution of salt is called brine. 50 30 25 60 26 / 30 Baking soda is basic non-metallic acidic metallic 27 / 30 What is the chemical formula of baking soda? CH₄ NaHCO₃ NaCl H₂SO₄ 28 / 30 Molecular formula for magnesium bromide is ……………….. . MgBr MgBr2 Mg2 Br2 Mg2 Br 29 / 30 Chlorine gas is a strong ……………….. agent. acidic oxidizing reducing neutral 30 / 30 Select the odd one out: Na2CO3.10H2O, Na2SO4.10H2O, BaCl2.2H2O, CaOCl2 CaOCl2 Na2 CO3 .10H2 O Na2 SO4 .10H2 O Na2 SO4 .10H2 O CaOCl2 : It is amorphous in nature while rest are crystalline in nature. Your score is The average score is 72% 0% Restart quiz
Class 9 | Reflection Of Light Class 9 | Maharashtra Board | Quiz + Flash Cards, Quiz + Flashcards / By Shubham Jha
Class 9 | Study of Sound 1 Comment / Class 9 | Maharashtra Board | Quiz + Flash Cards, Quiz + Flashcards / By Shubham Jha