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Chemistry MCQ Questions Set-1

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1. The purest form of iron is




2. Among the following the maximum covalent character is shown by the compound (1)MgCl2 (2)FeCl2 (3)SnCl2 (4) AlCl3




3. Hydrogen bomb is based on the principle of




4. Boron cannot form which one of the following anions? (1) BO?2 (2) BF3?6 (3) BH?4 (4) B(OH)?4




5. SI unit of equivalent conductance




6. Silver Mirror test is given by which one of the following compounds? 1. Benzophenone 2. Acetaldehyde 3. Acetone 4. Formaldehyde




7. Which pair of atoms has the highest electronegativity difference? (Calciums electronegativity is 1.0 Fluorines electronegativity is 4.0 Hydrogens electronegativity is 2.2 Sodiums electronegativity is 0.93




8. Which of the following is a non metal that remains liquid at room temperature ?




9. which of the following are chemical changes? A) Cooking of Food B) Digestion of Food C) Freezing of water D) Water is heated up




10. Which one of the following is not a mixture




11. Among the given nutrients milk is a poor source of




12. A breath test used by traffic police to check drunken driving uses ____?




13. Brass gets discoloured in air because of the presence of which of the following gases in air ?




14. Which of the following reactions are exothermic? 1) C + O2 ? CO22) 2Mg + O2 ? 2MgO3) CuSO4 + 5H2O ? CuSO4.5H2O4) All the above




15. What is the structure of IF7 ?




16. what is the chemical name of the compound Cu2CO3




17. What is the IUPAC name for the following compound? H3C?C?C?H




18. Is C2 Paramagnetic or Diamagnetic?




19. When formaldehyde and potassium hydroxide are heated we get




20. Name the Scientist who stated that matter can be converted into energy




21. Which of the Following is an Amorphous solid?




22. Place these hydrocarbons in order of decreasing boiling point. 1. Paraffin 2. Octadecane 3. Hexane 4. Neohexane and 5. Ethane




23. The enzyme that converts glucose to ethyl alcohol is




24. Permanent Hardness of water can be removed by adding




25. Give the common name for the following compound (CH3)2CH CH2 ? Br




26. What is the oxidation number of sulfur in H2S?




27. A mixture of sand and naphthalene can be separated by




28. Which solution is most concentrated?




29. What is the third most common gas found in the air we breathe ?




30. Which one of the following substances does not have a melting point




31. Yellow cake an item of smuggling across border s




32. Which one of the following mixture is homogeneous




33. Cobalt - 60 is commonly used in radiation therapy because it emits




34. he M.K.S. system was first introduced by




35. NH3 oxidation number?




36. The discovery of neutron became very late because




37. The absolute value of charge on electron was determined by




38. The electrochemical cell stops working after some time because ________




39. How many electrons are there in Na+




40. Temporary hardness is due to the presence of




41. The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of 10 dm3 at 27 Degree C is to a volume of 100 dm3




42. When water freezes its density




43. Misch metal is widely used in manufacture of which of the following




44. What is the element present in urea




45. The reduction potential of hydrogen half-cell will be negative if : (1) P(H2)= 2 atm and [H+] = 2.0 M (2) P(H2)= 1 atm and [H+] = 2.0 M (3) P(H2)= 1 atm and [H+] = 1.0 M (4) P(H2)= 2 atm and [H+] = 1.0 M




46. Which of the following is NOT a compound?




47. Which one of the following elements is essential for construction is nuclear reactors