26. What is the atomic number of oxygen?
a) 6
b) 7
c) 8
d) 9
Answer: c) 8
27. Which element has the highest electronegativity?
a) Fluorine
b) Oxygen
c) Nitrogen
d) Chlorine
Answer: a) Fluorine
28. What is the name of the group of elements that includes fluorine, chlorine, bromine, and iodine?
a) Noble gases
b) Alkali metals
c) Halogens
d) Transition metals
Answer: c) Halogens
29. What is the chemical formula for sulfuric acid?
a) H2SO3
b) H2SO4
c) HNO3
d) HCl
Answer: b) H2SO4
30. What is the pH range of acidic solutions?
a) 0-7
b) 7-14
c) 7-10
d) 14-0
Answer: a) 0-7
General science GK
31. Which of the following is a diatomic molecule?
a) CO2
b) O2
c) CH4
d) NH3
Answer: b) O2
32. What is the process by which a solid changes directly into a gas called?
a) Sublimation
b) Deposition
c) Condensation
d) Freezing
Answer: a) Sublimation
33. What is the common name for H2O2?
a) Water
b) Hydrogen peroxide
c) Heavy water
d) Hydrochloric acid
Answer: b) Hydrogen peroxide
34. Which element is commonly used in batteries?
a) Lithium
b) Carbon
c) Iron
d) Nitrogen
Answer: a) Lithium
35. What is the molecular formula of glucose?
a) C6H6
b) C6H12O6
c) C12H22O11
d) C2H5OH
Answer: b) C6H12O6
36. What type of chemical reaction is the combination of hydrogen and oxygen to form water?
a) Decomposition
b) Synthesis
c) Single displacement
d) Double displacement
Answer: b) Synthesis
37. Which acid is present in the stomach?
a) Acetic acid
b) Hydrochloric acid
c) Sulfuric acid
d) Nitric acid
Answer: b) Hydrochloric acid
38. What is the atomic symbol for silver?
a) Au
b) Ag
c) Si
d) Sb
Answer: b) Ag
39. What is the primary component of air?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Argon
Answer: b) Nitrogen
40. Which of the following is an example of an exothermic reaction?
a) Melting of ice
b) Photosynthesis
c) Combustion of wood
d) Electrolysis of water
Answer: c) Combustion of wood
General science GK
41. What is the name of the process where a liquid changes into a solid?
a) Condensation
b) Freezing
c) Evaporation
d) Sublimation
Answer: b) Freezing
42. What type of bond is formed when one atom donates an electron to another atom?
a) Covalent bond
b) Ionic bond
c) Hydrogen bond
d) Metallic bond
Answer: b) Ionic bond
43. What is the common name for CaCO3?
a) Chalk
b) Baking soda
c) Epsom salt
d) Bleach
Answer: a) Chalk
44. Which gas is commonly known as "dry ice"?
a) Carbon monoxide
b) Carbon dioxide
c) Oxygen
d) Nitrogen
Answer: b) Carbon dioxide
45. What is the pH of a basic solution?
a) 0-7
b) 7
c) 7-14
d) 14-0
Answer: c) 7-14
46. What is the chemical formula for ethanol?
a) C2H4O2
b) C2H5OH
c) C2H6O2
d) C3H7OH
Answer: b) C2H5OH
47. Which element is most commonly associated with organic chemistry?
a) Oxygen
b) Nitrogen
c) Carbon
d) Hydrogen
Answer: c) Carbon
48. What is the term for a solution that can resist changes in pH when small amounts of acid or base are added?
a) Acid
b) Base
c) Buffer
d) Salt
Answer: c) Buffer
49. What is the molecular formula of benzene?
a) C6H12
b) C6H6
c) C5H10
d) C4H8
Answer: b) C6H6
50. What type of reaction occurs when an acid reacts with a base to form water and a salt?
a) Redox reaction
b) Neutralization reaction
c) Decomposition reaction
d) Combustion reaction
Answer: b) Neutralization reaction
General science GK
Important Topics:
Quiz:
Sorry for the typing. I hope you will correct me in the comment box.