Chemistry
Chemistry
What is the chemical symbol for Gold?
- A) Ag
- B) Au
- C) Pb
- D) Hg
- Answer: B) Au
Which element is known as the “King of Chemicals”?
- A) Hydrogen
- B) Sulfur
- C) Nitrogen
- D) Oxygen
- Answer: B) Sulfur
What is the molecular formula for water?
- A) H2O
- B) HO
- C) H2O2
- D) OH2
- Answer: A) H2O
Which of the following is a noble gas?
- A) Oxygen
- B) Nitrogen
- C) Helium
- D) Hydrogen
- Answer: C) Helium
What is the pH value of pure water at 25°C?
- A) 5
- B) 7
- C) 9
- D) 14
- Answer: B) 7
Who is known as the father of modern chemistry?
- A) Isaac Newton
- B) Antoine Lavoisier
- C) Dmitri Mendeleev
- D) Marie Curie
- Answer: B) Antoine Lavoisier
What is the common name for Sodium Chloride?
- A) Baking Soda
- B) Table Salt
- C) Epsom Salt
- D) Bleach
- Answer: B) Table Salt
Which gas is produced when a metal reacts with acid?
- A) Oxygen
- B) Hydrogen
- C) Nitrogen
- D) Carbon Dioxide
- Answer: B) Hydrogen
What is the main component of natural gas?
- A) Ethane
- B) Butane
- C) Methane
- D) Propane
- Answer: C) Methane
What type of bond is formed by the sharing of electrons?
- A) Ionic Bond
- B) Covalent Bond
- C) Metallic Bond
- D) Hydrogen Bond
- Answer: B) Covalent Bond
Which acid is found in vinegar?
- A) Citric Acid
- B) Acetic Acid
- C) Hydrochloric Acid
- D) Sulfuric Acid
- Answer: B) Acetic Acid
What is the chemical formula for sodium bicarbonate?
- A) NaCl
- B) NaOH
- C) NaHCO3
- D) Na2CO3
- Answer: C) NaHCO3
What is the term for a substance that speeds up a chemical reaction without being consumed?
- A) Solvent
- B) Catalyst
- C) Reactant
- D) Product
- Answer: B) Catalyst
Which element has the highest electronegativity?
- A) Hydrogen
- B) Oxygen
- C) Fluorine
- D) Chlorine
- Answer: C) Fluorine
Which process is used to separate crude oil into its components?
- A) Filtration
- B) Distillation
- C) Chromatography
- D) Sublimation
- Answer: B) Distillation
What is the chemical formula for ammonia?
- A) NH3
- B) NH4
- C) NO3
- D) NO2
- Answer: A) NH3
Which of the following is an alkaline earth metal?
- A) Sodium
- B) Magnesium
- C) Aluminum
- D) Iron
- Answer: B) Magnesium
What is the term for a solution with a pH less than 7?
- A) Basic
- B) Neutral
- C) Acidic
- D) Alkaline
- Answer: C) Acidic
Which element is represented by the symbol ‘Fe’?
- A) Fluorine
- B) Francium
- C) Iron
- D) Fermium
- Answer: C) Iron
What is the main component of the Earth’s atmosphere?
- A) Oxygen
- B) Carbon Dioxide
- C) Nitrogen
- D) Hydrogen
- Answer: C) Nitrogen
What type of reaction is combustion?
- A) Endothermic
- B) Exothermic
- C) Neutralization
- D) Precipitation
- Answer: B) Exothermic
Which gas is commonly known as laughing gas?
- A) Nitrogen Dioxide
- B) Nitrous Oxide
- C) Ammonia
- D) Methane
- Answer: B) Nitrous Oxide
What is the atomic number of carbon?
- A) 4
- B) 6
- C) 8
- D) 10
- Answer: B) 6
Which of the following is not an element?
- A) Water
- B) Helium
- C) Gold
- D) Carbon
- Answer: A) Water
What is the pH of a neutral solution?
- A) 0
- B) 1
- C) 7
- D) 14
- Answer: C) 7
What is the formula for calculating molarity?
- A) Moles of solute / Volume of solution (L)
- B) Mass of solute / Volume of solution (L)
- C) Volume of solute / Volume of solvent
- D) Moles of solvent / Volume of solution (L)
- Answer: A) Moles of solute / Volume of solution (L)
Which of the following is a metalloid?
- A) Silicon
- B) Sulfur
- C) Sodium
- D) Silver
- Answer: A) Silicon
Which process is used to separate a solid from a liquid in a heterogeneous mixture?
- A) Distillation
- B) Filtration
- C) Evaporation
- D) Crystallization
- Answer: B) Filtration
What is the common name for CaCO3?
- A) Baking Soda
- B) Limewater
- C) Marble
- D) Chalk
- Answer: D) Chalk
Which acid is found in the stomach?
- A) Sulfuric Acid
- B) Hydrochloric Acid
- C) Acetic Acid
- D) Citric Acid
- Answer: B) Hydrochloric Acid
Which element is liquid at room temperature?
- A) Gold
- B) Mercury
- C) Silver
- D) Aluminum
- Answer: B) Mercury
What is the main gas involved in photosynthesis?
- A) Oxygen
- B) Nitrogen
- C) Carbon Dioxide
- D) Methane
- Answer: C) Carbon Dioxide
Which of the following is a strong acid?
- A) H2O
- B) HCl
- C) NH3
- D) CH4
- Answer: B) HCl
Which of the following is an alkali metal?
- A) Iron
- B) Calcium
- C) Sodium
- D) Aluminum
- Answer: C) Sodium
What is the molar mass of water (H2O)?
- A) 16 g/mol
- B) 18 g/mol
- C) 20 g/mol
- D) 22 g/mol
- Answer: B) 18 g/mol
What is the common name for the compound with the chemical formula NaOH?
- A) Table Salt
- B) Baking Soda
- C) Lye
- D) Epsom Salt
- Answer: C) Lye
Which of the following is a chemical change?
- A) Melting Ice
- B) Boiling Water
- C) Burning Wood
- D) Shredding Paper
- Answer: C) Burning Wood
What is the main component of rust?
- A) FeO
- B) Fe2O3
- C) FeSO4
- D) FeCl3
- Answer: B) Fe2O3
Which element is represented by the symbol ‘K’?
- A) Krypton
- B) Potassium
- C) Calcium
- D) Sodium
- Answer: B) Potassium
What is the process of a solid changing directly to a gas called?
- A) Evaporation
- B) Condensation
- C) Sublimation
- D) Deposition
- Answer: C) Sublimation
What is the chemical name for table sugar?
- A) Glucose
- B) Fructose
- C) Sucrose
- D) Lactose
- Answer: C) Sucrose
What type of reaction is characterized by the transfer of electrons?
- A) Acid-Base
- B) Precipitation
- C) Redox
- D) Decomposition
- Answer: C) Redox
Which gas is used in the process of carbonation of beverages?
- A) Oxygen
- B) Nitrogen
- C) Carbon Dioxide
- D) Hydrogen
- Answer: C) Carbon Dioxide
Which of the following is an example of an endothermic reaction?
- A) Combustion
- B) Photosynthesis
- C) Freezing Water
- D) Condensation
- Answer: B) Photosynthesis
What is the atomic number of Helium?
- A) 1
- B) 2
- C) 3
- D) 4
- Answer: B) 2
What is the most abundant element in the Earth’s crust?
- A) Iron
- B) Aluminum
- C) Oxygen
- D) Silicon
- Answer: C) Oxygen
Which of the following is a diatomic molecule?
- A) CO2
- B) H2
- C) NH3
- D) CH4
- Answer: B) H2
What is the chemical formula for hydrochloric acid?
- A) H2SO4
- B) HCl
- C) HNO3
- D) H3PO4
- Answer: B) HCl
Which element is used as a semiconductor in electronics?
- A) Carbon
- B) Silicon
- C) Sulfur
- D) Phosphorus
- Answer: B) Silicon
What is the chemical formula for ethanol?
- A) C2H4OH
- B) C2H6OH
- C) C2H5OH
- D) C3H7OH
- Answer: C) C2H5OH
Which gas is used in balloons to make them float?
- A) Hydrogen
- B) Helium
- C) Oxygen
- D) Carbon Dioxide
- Answer: B) Helium
What is the chemical formula for sulfuric acid?
- A) HNO3
- B) HCl
- C) H2SO4
- D) H3PO4
- Answer: C) H2SO4
What is the common name for Ca(OH)2?
- A) Limewater
- B) Baking Soda
- C) Epsom Salt
- D) Bleach
- Answer: A) Limewater
Which element is the primary component of diamonds?
- A) Silicon
- B) Carbon
- C) Boron
- D) Nitrogen
- Answer: B) Carbon
What type of bond is formed between two nonmetals?
- A) Ionic
- B) Covalent
- C) Metallic
- D) Hydrogen
- Answer: B) Covalent
Which gas is commonly used in fire extinguishers?
- A) Oxygen
- B) Carbon Dioxide
- C) Nitrogen
- D) Helium
- Answer: B) Carbon Dioxide
What is the main element in steel?
- A) Aluminum
- B) Iron
- C) Copper
- D) Zinc
- Answer: B) Iron
Which element has the atomic number 1?
- A) Helium
- B) Hydrogen
- C) Lithium
- D) Beryllium
- Answer: B) Hydrogen
What is the common name for NaCl?
- A) Baking Soda
- B) Table Salt
- C) Epsom Salt
- D) Bleach
- Answer: B) Table Salt
Which of the following is an example of a heterogeneous mixture?
- A) Salt Water
- B) Air
- C) Vinegar
- D) Salad
- Answer: D) Salad
Which element is represented by the symbol ‘Cu’?
- A) Calcium
- B) Chromium
- C) Copper
- D) Cobalt
- Answer: C) Copper
Which of the following is an example of a physical change?
- A) Burning Wood
- B) Rusting Iron
- C) Melting Ice
- D) Baking a Cake
- Answer: C) Melting Ice
What is the chemical formula for carbon dioxide?
- A) CO
- B) CO2
- C) C2O
- D) C2O2
- Answer: B) CO2
What is the main gas found in the air we breathe?
- A) Oxygen
- B) Nitrogen
- C) Carbon Dioxide
- D) Argon
- Answer: B) Nitrogen
What is the chemical name for table sugar?
- A) Glucose
- B) Fructose
- C) Sucrose
- D) Lactose
- Answer: C) Sucrose
What is the atomic number of Neon?
- A) 8
- B) 9
- C) 10
- D) 11
- Answer: C) 10
What type of reaction is characterized by the breaking down of a compound into simpler substances?
- A) Synthesis
- B) Decomposition
- C) Combustion
- D) Displacement
- Answer: B) Decomposition
What is the chemical formula for baking soda?
- A) NaCl
- B) NaOH
- C) NaHCO3
- D) Na2CO3
- Answer: C) NaHCO3
Which of the following is an acid?
- A) NaOH
- B) KOH
- C) HCl
- D) NH3
- Answer: C) HCl
Which element has the highest melting point?
- A) Iron
- B) Tungsten
- C) Gold
- D) Platinum
- Answer: B) Tungsten
What is the molecular formula for glucose?
- A) C6H12O6
- B) C6H6O6
- C) C12H6O12
- D) C6H10O6
- Answer: A) C6H12O6
What is the process of a gas turning into a liquid called?
- A) Evaporation
- B) Condensation
- C) Sublimation
- D) Deposition
- Answer: B) Condensation
Which element is a halogen?
- A) Helium
- B) Hydrogen
- C) Iodine
- D) Silicon
- Answer: C) Iodine
What is the atomic number of Oxygen?
- A) 6
- B) 7
- C) 8
- D) 9
- Answer: C) 8
What is the chemical formula for sulfuric acid?
- A) HNO3
- B) HCl
- C) H2SO4
- D) H3PO4
- Answer: C) H2SO4
Which gas is used in the Haber process for manufacturing ammonia?
- A) Oxygen
- B) Hydrogen
- C) Nitrogen
- D) Methane
- Answer: C) Nitrogen
What is the chemical formula for hydrochloric acid?
- A) H2SO4
- B) HCl
- C) HNO3
- D) H3PO4
- Answer: B) HCl
Which element is used in the production of nuclear energy?
- A) Carbon
- B) Uranium
- C) Silicon
- D) Iron
- Answer: B) Uranium
What is the common name for NH3?
- A) Ammonium
- B) Ammonia
- C) Ammonium Chloride
- D) Ammonium Hydroxide
- Answer: B) Ammonia
Which element is the primary component of the sun?
- A) Hydrogen
- B) Helium
- C) Oxygen
- D) Carbon
- Answer: A) Hydrogen
What is the chemical formula for methane?
- A) CH4
- B) C2H6
- C) C3H8
- D) C4H10
- Answer: A) CH4
What type of bond is formed between a metal and a nonmetal?
- A) Ionic
- B) Covalent
- C) Metallic
- D) Hydrogen
- Answer: A) Ionic
Which element has the atomic number 12?
- A) Magnesium
- B) Sodium
- C) Aluminum
- D) Silicon
- Answer: A) Magnesium
Which gas is used in the production of soft drinks?
- A) Oxygen
- B) Nitrogen
- C) Carbon Dioxide
- D) Hydrogen
- Answer: C) Carbon Dioxide
What is the molecular formula for ethanol?
- A) C2H4OH
- B) C2H6OH
- C) C2H5OH
- D) C3H7OH
- Answer: C) C2H5OH
What is the chemical formula for calcium carbonate?
- A) CaCO3
- B) Ca(OH)2
- C) CaCl2
- D) CaSO4
- Answer: A) CaCO3
Which element is used in the manufacture of computer chips?
- A) Carbon
- B) Silicon
- C) Sulfur
- D) Phosphorus
- Answer: B) Silicon
What is the common name for sodium hydroxide?
- A) Lye
- B) Baking Soda
- C) Epsom Salt
- D) Bleach
- Answer: A) Lye
Which element is represented by the symbol ‘Zn’?
- A) Zinc
- B) Zirconium
- C) Nitrogen
- D) Xenon
- Answer: A) Zinc
Which element is found in the hemoglobin of blood?
- A) Sodium
- B) Iron
- C) Potassium
- D) Calcium
- Answer: B) Iron
What is the chemical formula for acetic acid?
- A) H2SO4
- B) HCl
- C) CH3COOH
- D) HNO3
- Answer: C) CH3COOH
Which element has the highest density?
- A) Lead
- B) Gold
- C) Platinum
- D) Osmium
- Answer: D) Osmium
What is the molecular formula for benzene?
- A) C6H6
- B) C6H12
- C) C6H10
- D) C6H8
- Answer: A) C6H6
Which element is used in making matches?
- A) Sulfur
- B) Phosphorus
- C) Carbon
- D) Potassium
- Answer: B) Phosphorus
Which of the following is a polyatomic ion?
- A) Na+
- B) Cl-
- C) NH4+
- D) H+
- Answer: C) NH4+
What is the common name for H2O2?
- A) Water
- B) Hydrogen Peroxide
- C) Ammonia
- D) Methane
- Answer: B) Hydrogen Peroxide
What is the main component of limestone?
- A) NaCl
- B) CaCO3
- C) MgSO4
- D) KCl
- Answer: B) CaCO3
Which gas is used in the process of welding?
- A) Oxygen
- B) Nitrogen
- C) Argon
- D) Helium
- Answer: A) Oxygen
What is the chemical formula for sodium sulfate?
- A) NaCl
- B) Na2SO4
- C) NaOH
- D) NaHCO3
- Answer: B) Na2SO4
Which element is used in the production of glass? – A) Carbon – B) Silicon – C) Sulfur – D) Phosphorus – Answer: B) Silicon
