12th Chemistry Past Paper PDF - Study Almighty Classes

# Study Almighty Classes - Class 12th Chemistry Top 400 VVI Objective Question with Answer ## Topics Covered: - Carbon - Benzene - Malachite Ore - Copper Pyrite - Earth's Crust - Tetrahedral Shape - Oxidation Number - Heat and Electricity Conductor - Unit Cell - Rate of Reaction - Cinnabar - Transit...

# Study Almighty Classes - Class 12th Chemistry Top 400 VVI Objective Question with Answer ## Topics Covered: - Carbon - Benzene - Malachite Ore - Copper Pyrite - Earth's Crust - Tetrahedral Shape - Oxidation Number - Heat and Electricity Conductor - Unit Cell - Rate of Reaction - Cinnabar - Transition Elements - Covalent Number - Bakelite - H3PO3 - Secondary Cell - Alkanes - CaO Formula - Helium - XeF4 Shape - Rate of Reaction - Bismat - Oxidizing Substance - Sulphide Ore - Transition Elements - Molecular Property - Heat Effect - Freezing Point Depression - Nitric Acid - IUPSC Name - Single Atomic Gas - P-block Elements - Number of Elements in Periods - Tribasic Acid - Diffusion Capacity - Tap Water - Tin Symbol - Electronic Configuration of Carbon - P-block Element - Acid Prepared by Salt Cake Furnace - Transition Elements - Dettol - Persistent Solid Substance - pH of Pure Water - Impurity in Ore - Nitrogen and Oxygen - Number of Bonds in Ethene - Sucrose Formula - Caprolactam - CuSO4.5H2O Formula - Free State Element - Sodium Group - Benzene Formula - Covalent Number in Cubic Structure - Copper Refining Method - Sigma Bonds in CH4 - Methoxy Methane - Identifying Phenol - Vitamin Deficiency - Oleum Formula - Atomic Mass - Lunar Caustic - Ores and Minerals - Ketones - Density of Crystal Due to Shortkey Defect - Subvalent Number of Cl in NaCl - Number of Angles in Cubic Unit Cell - Density of Crystal Due to Frenkel Defect - Packing Capacity - Percentage of Free Space in BCC Unit Cell - Faraday's Second Law - Biomolecules containing Mg - Antioxidant ## Questions and Answers 1. The valency of carbon is: - *Answer*: 4 2. The general formula for benzene is: - *Answer*: C6H6 3. Malachite Ore is: - *Answer*: Copper 4. The formula for copper pyrite is: - *Answer*: CuFeS2 5. The most abundant element in the earth's crust is: - *Answer*: Al 6. Which of the following has a tetrahedral shape: - *Answer*: [Ni(Cl)4]2 7. The Ni oxidation number in [Ni(CO)4] will be: - *Answer*: 0 8. A good conductor of heat and electricity is: - *Answer*: graphite 9. The number of atoms in the hcp unit cell is: - *Answer*: 6 10. The rate of reaction of an object depends on: - *Answer*: Molecular weight 11. The formula for cinnabar is: - *Answer*: HgS 12. Elements of which group are called transition elements: - *Answer*: d-block 13. The covalent number of Cr in Na3[Cr(C2O4)3] is: - *Answer*: 3 14. Bakelite is: - *Answer*: thermoplastic polymer 15. H3PO3 is a: - *Answer*: biphasic acid 16. Which of the following is a secondary cell: - *Answer*: lead storage battery 17. Compounds with the general formula CnH2n+2 are: - *Answer*: alkane 18. CaO whose formula is: - *Answer*: Black Chose 19. The main source of helium is: - *Answer*: Sun 20. The shape of XeF4 is: - *Answer*: square planar 21. The rate of a reaction is expressed in the following way: velocity=K.[A]²[B] then the order of the reaction will be: - *Answer*: 3 22. Bismat has the most stable oxidation state. - *Answer*: +3 23. Which of the following is the most powerful oxidising substance - *Answer*: Cl2 24. Sulphide ore is collected from: - *Answer*: by foam buoyancy method 25. Which of the following is not a transition element of the first row: - *Answer*: Magnesium 26. Which of the following is not a molecular property. - *Answer*: expected depression of vapor pressure 27. Which is not affected by heat: - *Answer*: molality 28. Which of the following will have maximum freezing point depression: - *Answer*: K2SO4 29. Nitric acid is prepared by: - *Answer*: Ostwald method 30. Write the IUPSC name of K2[Ni(CN)4] - *Answer*: Potassium tetra cyano nickelate (II) 31. Which of the following gas is single atomic? - *Answer*: Helium 32. Which of the following is not a p-block element - *Answer*: Mg 33. The number of elements in the second period of the periodic table is - *Answer*: 8 34. Tribasic acid is - *Answer*: H3PO4 35. Highest diffusion capacity is found in - *Answer*: He 36. The formula of tap water is: - *Answer*: H2O 37. Tin stands for: - *Answer*: Sn 38. The electronic configuration of carbon is - *Answer*: 1s², 2s², 2p² 39. Which of the following is not an element of P block? - *Answer*: Ba 40. Which of the following acid is prepared by salt cake furnace? - *Answer*: HCl 41. The transition element is: - *Answer*: Elements of the d-section 42. Which of the following is not a first transition series element. - *Answer*: Mg 43. Dettol is used; - *Answer*: as an antiseptic 44. Persistent solid substance is : - *Answer*: Couch 45. The pH of pure water is: - *Answer*: 7 46. The impurity present in the ore is called: - *Answer*: gang 47. Nitrogen and Oxygen are: - *Answer*: non-metals 48. The number of bonds in ethene is: - *Answer*: 2 49. Sucrose has the formula. - *Answer*: C12H22O11 50. Caprolactam is the monomer of? - *Answer*: Nylon 6 51. CuSO4. 5H20 is the formula of: - *Answer*: Blue Kashish 52. Which of the following metals is found in free state in nature - *Answer*: gold 53. Sodium is a member of which group of the periodic table. - *Answer*: Group I 54. The formula of benzene is: - *Answer*: C6H6 55. The intercentered cubic structure has a covalent number. - *Answer*: 8 56. Copper metal is refined by which of the following method? - *Answer*: electrolytic refining 57. The number of sigma bonds in CH4 is - *Answer*: 4 58. Which of the following is the formula for methoxy methane: - *Answer*: CH3-O-CH3 59. Identify phenol in the following - *Answer*: C6H5OH 60. Deficiency of which vitamin causes night blindness: - *Answer*: Vitamin A 61. The formula of oleum is: - *Answer*: H2S2O7 62. Atomic mass is equal. - *Answer*: the sum of the number of neutrons and protons of an atom 63. The formula of Lunar Caustic is : - *Answer*: AgNO3 64. Which of the following statement is correct: - *Answer*: All ores are minerals 65. The functional radical of ketones is : - *Answer*: >C=O 66. Density of crystal due to Shortkey defect - *Answer*: decreases 67. The subvalent number of CI in NaCl is - *Answer*: 3 68. The number of angles in the unit cell of a simple cube is - *Answer*: 1 69. Density of crystal in presence of Frenkel defect : - *Answer*: does not change 70. Which pair has maximum packing capacity? - *Answer*: hep and cep 71. The percentage of free space in the bcc unit cell is: - *Answer*: 32% 72. Faraday's second law of dissipation is related to. - *Answer*: by an equivalent load of electricity 73. Mg is a major constituent of which of the following biomolecules? - *Answer*: Chlorophyll 74. Which of the following is an antioxidant? - *Answer*: all of these ## Additional Information The document contains a picture of a Study Almighty Classes advertisement along with a note to contact Dheeraj Sir for PDF notes. The document contains many misspellings, typos and formatting inconsistencies - this can be attributed to the image being created from handwritten notes.