Class 9 Chemistry Past Papers MCQs Grand Practice Test by admin | Class 9 MCQs Tests | 0 comments 27 Class 9 ChemistryPast Papers MCQsGrand Practice Test 1 1 / 60 A compound with chemical formula BaSX4 has a formula mass of 233 amu. The atomic mass of the element X is: 106 23 16 12 2 / 60 What is the mass of FOUR moles of Hydrogen (H2) gas? 2.016 g 1 g 8.064 g 10 g 3 / 60 The oxidation state of Hydrogen in metal hydride is? – 2 +2 +1 – 1 4 / 60 The covalent bond is formed by: Complete transfer of electrons Accepting electron pair by one atom Mutual sharing of an electron pair by two atoms Donating an electron pair by one atom 5 / 60 The volume of a 0.5 M solution of hydrochloric acid containing its 2 moles is: 0.4 dm3 2 dm3 0.5 dm3 4.0 dm3 6 / 60 Identify the metal used as a catalyst in contact process: Ni Fe Zn Pt 7 / 60 The melting point and boiling point of water are higher due to: Its higher molecular mass Hydrogen bonding Its covalent nature Its higher density 8 / 60 M shell has subshells: 2s2p 3s3p3d 1s2s 1s2s3s 9 / 60 Which of the following oxides is the most basic oxide? CaO SrO BaO MgO 10 / 60 Which one of the following elements belongs to Group III-A of the periodic table? Al Mg Si K 11 / 60 The bond which is formed by complete transfer of electrons from one atom to another is called: Ionic bond Covalent bond Hydrogen bond Co-ordinate bond 12 / 60 In which group are halogen elements present? VIII A I A II A VII A 13 / 60 Which of the following is the correct empirical formula of C6H4O(NO2)3? C3H4O3N C6H4O7N3 C3H2O7N3 C3H2O3N2 14 / 60 Acetone melts at – 94°C and boils at 56°C. What is the physical state of Acetone at 25°C and 1 atm? Gas Solid Cannot be predicted Liquid 15 / 60 Galvanizing is: Coating with Cu Coating with Sn Coating with Cr Coating with Zn 16 / 60 Identify the covalent compound. KF NaCl H2O MgO 17 / 60 Bromine has a melting point of – 7°C and a boiling point of 59°C. What is the physical state of Bromine at 100°C? Solid Can not be predicted Gas Liquid 18 / 60 Which of the following oxides is amphoteric oxide? MgO Na2O Al2O3 SO2 19 / 60 In the formation of AlF3, how many electron(s) are lost by an Aluminum atom? 2 4 1 3 20 / 60 Which of the following is the opposite of melting? Boiling Sublimation Evaporation Freezing 21 / 60 In NaCl cubic crystal each Cl-1 ion is surrounded by ______ Na+ ions. 8 5 6 4 22 / 60 The electronic configuration “1S2 2S2 2P6 3S2” belongs to: Mg Al Si Ar 23 / 60 Galvanizing is: Coating with Sn Coating with Zn Coating with Cu Coating with Cr 24 / 60 Identify the element which has the largest atomic radius. Mg Ca Cs Fr 25 / 60 Which of the element of the 3rd period has highest electronegativity? Na P Cl S 26 / 60 Consider the following reaction:CuO + H2 → Cu + H2OIn this reaction CuO behaves as: Oxidizing agent Catalyst Reducing agent Electrolyte 27 / 60 The period number of Phosphorus is: 2 4 3 1 28 / 60 Which of the following ions, Chlorine cannot oxidize? Bromine Astatine Fluoride Iodide 29 / 60 A solution contains 0.05 moles of KMnO4 in 600 cm3 of solution. The morality of this solution is: 1 M 2 M 0.083 M 0.093 M 30 / 60 The direct conversion of a solid into vapours is called: Melting Sublimation Boiling Evaporation 31 / 60 Which of the following molecules has triple covalent bond between its atoms? O2 F2 N2 H2 32 / 60 A 100 gram solution contains 25 grams of a solute. This solution will be called: 125% solution of that solute 75% solution of that solute 175% solution of that solute 25% solution of that solute 33 / 60 Which of the following property of halogens is maximum among the members of their period? Electropositivity Atomic radius Electronegativity Shielding effect 34 / 60 An aqueous solution can dissolve 25 g of a solid at 25°C. If someone dissolves 20g of this solid in water at 25°C then this solution will be called: Saturated solution Solution of liquid in liquid Supersaturated solution Unsaturated solution 35 / 60 0.25 moles of SO2 will contain: 3.5055 x 1023 molecules 1.5055 x 1023 molecules 4.5055 x 1023 molecules 2.5055 x 1023 molecules 36 / 60 If molar mass of a compound is 90 g/mole, the number of its moles containing 3.011×1023 molecules will be: 4.5 3.0 1.5 0.5 37 / 60 Keeping in view Auf Bau Principle, identify the energy level which the elements fill first. 2P 1S 2S 3S 38 / 60 A liquid boils when its vapour pressure becomes equal to: 1 Pa 760 cmHg 101.325 KPa 0.1 atm 39 / 60 The oxidation state of B in H3BO3 is: +5 +3 +2 +4 40 / 60 The correct electronic configuration of Mg is: 1s2 2s2 2p66 3s2 3p6 4s2 3d4 1s2 2s2 2p4 3s4 1s2 2s2 2p66 3s2 3p6 4s1 3d5 1s2 2s2 2p6 3s2 41 / 60 A compound with chemical formula Na2CX3 has formula mass 106 amu. What is the atomic mass of the element X? [Atomic Masses: C=12, Na=23] 106 12 16 23 42 / 60 The equation V/T = Constant is the mathematical expression of: Charles’s law Law of diffusion Avogadro’s law Boyle's law 43 / 60 The aqueous solutions of ionic compounds conduct electricity due to: Crystalline structure Their high density Free movement of their ions in solution Their strong ionic bonds 44 / 60 Identify the number of electrons that the f-subshell can accommodate. 2 10 14 6 45 / 60 In which of the following processes speed of particles decrease? Boiling Evaporation Condensation Sublimation 46 / 60 A liquid boils when its vapour pressure becomes equal to: 360 torr 0.5 atm 76 mmHg 101.325kPa 47 / 60 Which of the following is the reaction taking place at anode? Pb + Cl2 → PbCl2 Zn+2 + 2e- → Zn 2H2 + O2 → 2H2O Cr → Cr+3 + 3e- 48 / 60 Which of the following elements has greater shielding effect? Li K Rb Na 49 / 60 If you move from left to right in a period of periodic table, which of the following will NOT change? Nuclear charge Atomic radius Shielding effect Atomic mass 50 / 60 What is the reducing agent in the following reaction?CuO + H2 → Cu + H2O CuO H2O H2 Cu 51 / 60 Which of the following elements in the given reaction is reduced?ZnO + H2 → Zn + H2O O ZnO Zn H2 52 / 60 A chemist dissolves 15g of NaCl in 85g of H2O. This solution is: 15% m/v NaCl solution 15% v/v NaCl solution 85% m/m NaCl solution 15% m/m NaCl solution 53 / 60 How many moles of Na atoms are present in 2.3 g of Na? 0.15 moles 1.5 moles 1 mole 0.1 moles 54 / 60 How many atoms are there in 0.1 moles of Carbon? 6.022 ×1022 6.022 ×1024 6.022 × 1023 6.022 × 1021 55 / 60 Which of the following is a defect of Rutherford atomic model? Most of the mass is present in nucleus Electrons do not fall into the nucleus Most of the space in atom is empty Electrons are negatively charged 56 / 60 How many atoms are there in 1.25 moles of Zinc? 8.53 × 1023 Zn atoms 9.53×1023 Zn atoms 7.53×1023 Zn atoms 6.63 × 1023 Zn atoms 57 / 60 Gain of electrons and loss of oxygen is called: Oxidation Redox reaction Neutralization reaction Reduction 58 / 60 The empirical formula for caffeine (C8H10N4O2) is: C5H5N2O C4H5NO2 C4H5N2O C4H5NO 59 / 60 ‘M’ shell of an atom has the following sub-shells: 2s, 2p 1s, 2s, 3s 3s, 3p, 3d 1s, 2s, 2p 60 / 60 A solution of NaOH has a concentration of 4g/ dm3. What is the mass of NaOH contained in 250 cm3 of this solution? 2 g 1 g 40 g 20 g Your score is LinkedIn Facebook Twitter 0% Restart quiz 11 Class 9 ChemistryPast Papers MCQsGrand Practice Test 2 1 / 60 Which metal is used to make filaments of electric bulb? Iron Tungsten Silver Copper 2 / 60 The bond formed between atoms due to transfer of electrons from one atom to another is called: Co-ordinate covalent bond Hydrogen bond Ionic bond Covalent bond 3 / 60 Which of the following molecules obey the duplet rule? O2 H2 N2 F2 4 / 60 A liquid boils when its vapour pressure becomes equal to: 760 atm 760 mm of Hg 0.1 atm 1 Pascal 5 / 60 Which of the following does not involve electrolytic process? Reduction of metal oxide by a reducing agent Electroplating of Steel Manufacture of Na from NaCl Refining of Copper 6 / 60 The tendency of a metal to lose electrons is called: Electron affinity Electro positivity Electro negativity Electricity 7 / 60 Galvanizing is: Coating with Copper Coating with Zinc Coating with Tin Coating with Chrome 8 / 60 Particles size of colloids vary from: 106 to 109 nm 103 to 106 nm 0.1 to 1 nm 1 to 103 nm 9 / 60 Which element is reduced in the given redox reaction?ZnO + H2 → Zn + H2O H2 O Zn ZnO 10 / 60 In which of the following changes the nitrogen atom is reduced? N2 to NH3 N2 to NO N2 to NO2 N2 to HNO3 11 / 60 Which of the following elements has a greater shielding effect? Na Li K Rb 12 / 60 Which term is same for one mole of oxygen gas and one mole of water? Atoms Molecules Volume Mass 13 / 60 Which is the property of crystalline solid? Irregular shape Well defined shape Random placement of particles Very soft 14 / 60 Fermentation of cane sugar produces ______ v/v of ethyl alcohol called rectified spirit. 85 % 100 % 90 % 95 % 15 / 60 Which one of the following compounds is not having an ionic bond? CO2 MgO NaCl MgF2 16 / 60 The oxidation number of Cr in Cr2O3 and K2Cr2O7 are: +6 and +2 +2 and +2 +4 and +7 +3 and +6 17 / 60 Which of the following molecules have a triple covalent bond? N2 NH3 Cl2 O2 18 / 60 Which one of the following sub shell is filled after filling of 3p sub shell? 3s 4p 4s 3d 19 / 60 Consider the following table:S NoXYX / Y1.1.002730.00372.1.373730.00373.1.734730.0037Which of the following relationship does this table represent? X ∝ Y X=Y X ∝ 1/ Y X = 1 / Y 20 / 60 Which of the following elements belongs to group VIII A? Mg Br Na Xe 21 / 60 Which of the following is the most basic oxide? MgO BaO CaO SrO 22 / 60 The oxidation number of Boron B. in H3BO3 is: – 3 +3 +1 +6 23 / 60 Which of the following atoms obeys the duplet rule? O N F H 24 / 60 A student mixed a solute in a solvent and made a mixture. After 15 minutes, he/she observed that solute has settled down. He/she will call this mixture as: Homogenous mixture Colloidal solution Suspension True solution 25 / 60 Which of the following is not the unit of pressure? KPa m3 mm Hg torr 26 / 60 What is the mass of Carbon present in 44 g of Carbon dioxide? 6 g 24 g 12 g 44 g 27 / 60 Electronic configuration of an element is 1s2 2s2 2p6 3s2 3p3. In which of the following groups it will be placed? V A III A II A IV A 28 / 60 Which of the following ions burns with brick red flame? Ca+2 Sr+2 Mg+2 Ba+2 29 / 60 Mention the amphoteric oxide out of given oxides. Al2O3 MgO SO2 Na2O 30 / 60 The electronic configuration of an element is 1s2, 2s2. An atom of this element will form an ion that will have a charge: +1 -2 +2 +3 31 / 60 In which of the following processes the speed of the particles decreases? Evaporation Melting Condensation Sublimation 32 / 60 Which of the following metals is the least reactive metal? Calcium Gold Sodium Potassium 33 / 60 The escape of molecules of a gas through a small hole one after the other is called: Evaporation Diffusion Effusion Boiling 34 / 60 The atomic radius of an atom _________ as one move from top to bottom in a group of periodic table. Increases Remains same Decreases First decreases then increases 35 / 60 Alloy are an example of: Gas – Liquid solution Liquid – Solid solution Gas – Solid solution Solid – Solid solution 36 / 60 In which of the following changes the nitrogen atom is reduced? N2 to NO2 N2 to NH3 N2 to HNO3 N2 to NO 37 / 60 Which of the following is the Empirical formula of Benzene? B2O3 CH2 C6H6 CH 38 / 60 How many molecules are present in 0.5 moles of Benzene (C6H6)? 4.011 x 1023 molecules 3.011 x 1023 molecules 2.011 x 1023 molecules 5.011 x 1023 molecules 39 / 60 The number of neutrons in an atom 23M11 is: 11 9 12 10 40 / 60 Which of the following groups contain alkaline earth metals? IV A III A I A II A 41 / 60 Which of the following elements will gain one electron to complete its octet? 35X17 32X16 27X13 40X18 42 / 60 If one mole of ‘Na’ contains ‘x’ atoms of Sodium, what is the number of atoms contained in 46g of Sodium? 2x 2 x 1.5 x 43 / 60 Which of the following quantities are the same for one mole of hydrogen gas and one mole of water? Number of gram atomic mass Mass Number of atoms Number of molecules 44 / 60 Which one of the following molecules has a non-polar covalent bond? N2O4 NH3 NO2 N2 45 / 60 If the temperature of 30 dm3 gas is increased from 273K to 546K the volume of it will become: 15 dm3 60 dm3 90 dm3 273 dm3 46 / 60 The number of neutrons in 27M13 is: 13 27 14 15 47 / 60 Which of the following substance has an ionic bond? SO2 MgO CO2 H2O 48 / 60 Which of the following elements belongs to VIII-A group? Br Ne Na Mg 49 / 60 A liquid boils when its vapour pressure becomes equal to: 101.325 KPa 760 cmHg 1 Pa 0.1 atm 50 / 60 Melting point of Sodium is: 107.8 °C 77.8 °C 87.8 °C 97.8 °C 51 / 60 Which one is heterogeneous mixture? Oil floating on water Air Table salt dissolved in water Water containing dissolved oxygen 52 / 60 H2S + Cl2 → 2HCl + SIn above reaction H2S behaves as: Oxidizing agent Electrolyte Catalyst Reducing agent 53 / 60 Rutherford used ________ particles in his experiment. He+2 He atom He-2 He+1 54 / 60 Water boils at ______ in a pressure cooker. 110 °C 130°C 100°C 120°C 55 / 60 Which of the following solids is amorphous? Glucose Ice Table salt Glass 56 / 60 How many atoms are there in 28 g of N2 gas? 1 12.044 x 1023 2 6.022 x 1023 57 / 60 Which quantity is same for one mole of Hydrogen gas and one mole of water? Number of gram atomic mass Mass Number of atoms C Number of molecules 58 / 60 An electrochemical cell in which electrical energy is used to derive a chemical reaction is called: Voltaic cell Electrolytic cell Galvanic cell Dry cell 59 / 60 The Oxidation number of ‘N’ in HNO3 is: +7 +3 +5 +2 60 / 60 Chloride ion can not oxidize ______ ion. Astatine Fluoride Bromide Iodide Your score is LinkedIn Facebook Twitter 0% Restart quiz 11 Class 9 ChemistryPast Papers MCQsGrand Practice Test 3 1 / 67 A solution of NaOH has a concentration of 4g/ dm3. What is the mass of NaOH contained in 250 cm3 of this solution? 20 g 40 g 1 g 2 g 2 / 67 SO2 is ___________ oxide. Strongly basic Strongly acidic Amphoteric Weekly acidic 3 / 67 What is the oxidation state of Hydrogen in case of Metallic Hydrides? +2 – 2 – 1 +1 4 / 67 What is the formula mass of CuSO4.5H2O?(Cu=63.5, H=1, O=16, S=32) 149.5 159.5 185.5 249.5 5 / 67 Which of the following is an amphoteric oxide? Al2O3 Na2O SO2 MgO 6 / 67 What is the mass of 4 moles of Hydrogen gas? 1 g 4.032 g 1.008 g 8.064 g 7 / 67 Which of the following is Sublime? Calcium Carbonate HCl (Acid) H2SO4 (Acid) Benzoic Acid 8 / 67 At Mount Everest, what is the boiling point of water? 90 °C 80 °C 100 °C 70 °C 9 / 67 Which of the following element is most metallic? Li Mg Na Al 10 / 67 How many moles of molecules are there in 16 g of Oxygen gas? 1 0.5 0.1 2 11 / 67 What is the mass of Carbon present in 44 g of CO2? 24 g 6 g 44 g 12 g 12 / 67 Which of the following solutions is more dilute? 0.009 M 2 M 0.1 M 1 M 13 / 67 The electron affinity increases from left to right along a period due to: Decrease in nuclear charge Increase in atomic size Decrease in atomic radius Increase in shielding effect 14 / 67 Which of the following is a molecular ion? CN. N3 N CN- 15 / 67 The increase in ionization energy from left to right in a period is due to: Increase in shielding effect Increase in nuclear charge Decrease in nuclear charge Decrease in shielding effect 16 / 67 Oxidation state/number of ‘Cr’ in K2Cr2O7 is: – 6 –14 +6 +2 17 / 67 If one mole of carbon contains x atoms, then what is the number of atoms contained in 12 g of Mg? 1.5 x x 0.5 x 2 x 18 / 67 Which of the following substance is sublimate? Sodium Carbonate Calcium Chloride Sodium Hydroxide Ammonium Chloride 19 / 67 The number of moles in 46 g of Sodium (Na) will be? 3 moles 1.5 moles 2 moles 2.5 moles 20 / 67 Galvanizing is coating with _________. Zn Cr Cu Sn 21 / 67 In chromium plating the H2SO4 is added to Cr2(SO4)3 in order to: Prevent hydrolysis Increase hydrolysis process Increase electrolytic power Make Cr neutral 22 / 67 When Arshad dissolves 28 g of KOH in one dm3 of water. Its molarity will be: 0.5 M 1 M 0.2 M 0.1 M 23 / 67 Oxidation number of Mn is KMnO4 is: +7 –7 +2 – 2 24 / 67 Oxidation state of Cr in K2Cr2O7 is: 6 12 3 Zero 25 / 67 How many moles of molecules are there in 16 g Oxygen? 0.05 0.5 1 0.1 26 / 67 A solution of NaOH contains 30 g of this compound in 1.5 dm3 of solution. What is the Molarity of this solution? 0.5 M 1 M 0.2 M 0.75 M 27 / 67 M shell has _____ subshells. 2s, 2p 1s, 2s, 3s 3s, 3p, 3d 1s, 2s 28 / 67 ‘V ∝ T’ Relationship represents: Avogadro’s law Charles's law General gas equation Boyle’s law 29 / 67 Period number of Phosphorus in Periodic table is: 2nd 5th 4th 3rd 30 / 67 The electronic configuration of an element is 1s2, 2s2. An atom of this element will form an ion that will have ______ charge. +3 +2 +1 –1 31 / 67 Which of the following sub-shells can accommodate 6 electrons? p f s d 32 / 67 In Aqua Regia, the ratio between HCl (Conc.) and HNO3 (Conc.) is: 1:3 2:1 1:2 3:1 33 / 67 The correct electronic configuration of an atom having atomic number ‘13’ is: 1s2 , 2s2 , 2p6 , 3s2 , 3p2 1s2 , 2s2 , 2p6 , 3s2 , 3p1 1s2 , 2s2 , 3s2 , 3p6 , 4s1 1s2 , 2p6 , 3s2 , 3p3 34 / 67 In the formation of AlF3, Al atom loses _________ electrons. 3 4 2 1 35 / 67 Consider the following table:S NoXYX / Y1.1.002730.00372.1.373730.00373.1.734730.00374.2.105730.0037Which of the following relationship does this table represent? X ∝ Y X = 1 / Y X ∝ 1 / Y X=Y 36 / 67 The number of moles in 54 g of water will be: 4 2.5 2 3 37 / 67 Which of the following is NOT TRUE about the formation of Na2S? Sulphur forms anions Sodium forms cat ions Each Sodium atom lose one electron Each Sulphur atom gains one electron 38 / 67 Number of neutrons in 27M13 is ________. 27 17 13 14 39 / 67 What is maximum amount of Sodium Acetate that can be dissolved in 100 g of water at 0°C? 220 g 119 g 320 g 170 g 40 / 67 Which of the following atoms obeys Duplet rule? H2 O2 F2 N2 41 / 67 Al2O3 is an example of ________ oxide. Weekly acidic Amphoteric Basic Strongly acidic 42 / 67 NaCl forms a colorless cubic crystal. Which of the following has also the same cubic crystal as NaCl crystal? CsCl CaCl2 MgO MgCl2 43 / 67 The melting point of Sodium Chloride is: 1001 °C 901 °C 801 °C 701 °C 44 / 67 Consider the given reaction:H2S + Cl2 → 2 HCl + SIn the above reaction, H2S behaves as a/an ________. Reducing agent Electrolyte Catalyst Oxidizing agent 45 / 67 Which of the following is Milk of Magnesia? Mg(NO3)2 MgO MgCO3 Mg(OH)2 46 / 67 Value of Plank’s constant is: 6.626 x 10-34 J.s 6.626 x 10-32 J.s 6.626 x 10-30 J.s 6.626 x 10-36 J.s 47 / 67 In chrome plating, the compound used as an electrolyte is: Cr2O3 Only H2SO4 Cr2(SO4)3 Cr2(SO4)3 and some drops of HCl 48 / 67 Rutherford used _____________ particles in his experiment. He+ He+2 He-2 He atom 49 / 67 Relationship “PV=Constant” represents: Boyle’s Law Charles's Law Avogadro’s Law General gas equation 50 / 67 Which of the following is a covalent compound? H2O NaCl KF MgO 51 / 67 Vegetable oil is converted into vegetable ghee by passing H2 gas through the oil. In this process which of the following elements is used as a catalyst? Cu Ni Pb Pt 52 / 67 A compound with chemical formula Na2CX3 has formula mass 106 amu. Atomic mass of the element X is _______. 23 12 16 106 53 / 67 Which of the following elements has greater shielding effect? Rb K Li Na 54 / 67 Which one of the following obeys Duplet rule? O2 N2 H2 F2 55 / 67 A liquid boils when its vapour pressure is __________. None of these 101.325 KPa 1 Pa 760 cm Hg 56 / 67 Which substance is NOT covalent? HCN CaO H2O CO2 57 / 67 How many elements were known by the end of the 18th century? 23 109 65 88 58 / 67 Silicon belongs to group IV A. It has _______ electrons in the valence shell. 6 4 2 3 59 / 67 Which substance does not have an ionic bond? MgO NaF CH4 NaCl 60 / 67 Which one is the correct electronic configuration according to Auf Bau Principle? 1s2 , 2s2 , 2p6 , 3s4 1s2 , 2s2 , 2p4 , 3s2 , 3p4 1s2 , 2s2 , 2p6 , 3s2 , 3p2 1s2 , 2p6 , 3s2 , 3p4 61 / 67 The horizontal rows of the periodic table are called: Shells Groups Sub-shells Periods 62 / 67 Which one of the following substances is not a sublimate? Ammonium Chloride Sodium Chloride Benzoic Acid Iodine. 63 / 67 Valence shell electronic configuration of an element M (Atomic No 14) is: 2s2, 2p2 2s2, 2p1 3s2, 3p2 None of these 64 / 67 In which group of the Periodic table is S present on the basis of electronic configuration? VI A group IV A group V A group VII A group 65 / 67 Due to high ionization energies, which element do NOT lose electron? Non-metals Radioactive elements Metals Transition elements 66 / 67 Which of the following elements in the given reaction is reduced?ZnO + H2 → Zn + H2O ZnO O Zn H2 67 / 67 Atomic numbers were discovered by: Moseley Rutherford Bohr Dalton Your score is LinkedIn Facebook Twitter 0% Restart quiz Submit a Comment Cancel replyYou must be logged in to post a comment.