What is the molecular weight of Hydrogen (H₂)?
2 g/mol

What is the molecular weight of Nitrogen (N₂)?
28 g/mol

What is the molecular weight of Carbon dioxide (CO₂)?
44 g/mol

What is the molecular weight of Methane (CH₄)?
16 g/mol

What is the molecular weight of Water (H₂O)?
18 g/mol

Which gas is known as laughing gas?
Nitrous oxide (N₂O)

Which gas is known as marsh gas?
Methane (CH₄)

Which gas is known as ozone gas?
O₃

Which gas is known as hydrogen peroxide?
H₂O₂

Which gas is known as carbon monoxide?
CO

What is the atomic number of Hydrogen?
Answer: 1

What is the atomic number of Oxygen?
Answer: 8

What is the atomic number of Carbon?
Answer: 6

What is the chemical symbol of Sodium?
Answer: Na

What is the chemical symbol of Potassium?
Answer: K

What is the chemical symbol of Calcium?
Answer: Ca

What is the chemical symbol of Gold?
Answer: Au

What is the chemical symbol of Silver?
Answer: Ag

What is the chemical symbol of Iron?
Answer: Fe

What is the pH of pure water at 25°C?
7

Which element has the highest electronegativity?
Fluorine

Which element has the lowest electronegativity?
Cesium

What is the chemical formula of Ammonia?
NH₃

What is the chemical formula of Sulfuric Acid?
H₂SO₄

What is the chemical formula of Nitric Acid?
HNO₃

What is the chemical formula of Hydrochloric Acid?
HCl

What is the chemical formula of Acetic Acid?
CH₃COOH

What is the chemical formula of Phosphoric Acid?
H₃PO₄

What is the chemical formula of Sodium Hydroxide?
NaOH

What is the chemical formula of Potassium Hydroxide?
KOH

What is the chemical formula of Calcium Hydroxide?
Ca(OH)₂

What is the chemical formula of Magnesium Hydroxide?
Mg(OH)₂

What is the chemical formula of Sodium Carbonate?
Na₂CO₃

What is the chemical formula of Calcium Carbonate?
CaCO₃

What is the chemical formula of Sodium Bicarbonate?
NaHCO₃

What is the chemical formula of Ammonium Chloride?
NH₄Cl

What is the chemical formula of Copper Sulfate?
CuSO₄

What is the chemical formula of Zinc Sulfate?
ZnSO₄

What is the chemical formula of Magnesium Sulfate?
MgSO₄

Which subatomic particle has a negative charge?
Electron

Which subatomic particle has a positive charge?
Proton

Which subatomic particle has no charge?
Neutron

What is the charge of an alpha particle?
+2

What is the charge of a beta particle?
-1

What is the charge of a gamma ray?
0

What is the SI unit of amount of substance?
Mole

What is Avogadro’s number?
6.022 × 10²³

What is the molar mass of Sodium (Na)?
23 g/mol

What is the molar mass of Chlorine (Cl)?
35.5 g/mol

What is the molar mass of Potassium (K)?
39 g/mol

What is the molar mass of Calcium (Ca)?
40 g/mol

What is the molar mass of Magnesium (Mg)?
24 g/mol

What is the molar mass of Sulfur (S)?
32 g/mol

What is the molar mass of Iron (Fe)?
56 g/mol

What is the molar mass of Copper (Cu)?
63.5 g/mol

What is the molar mass of Zinc (Zn)?
65 g/mol

What is the molar mass of Gold (Au)?
197 g/mol

What is the molar mass of Silver (Ag)?
108 g/mol

What is the molar mass of Aluminum (Al)?
27 g/mol

Which bond is formed by sharing of electrons?
Covalent bond

Which bond is formed by transfer of electrons?
Ionic bond

Which bond is formed by metallic atoms?
Metallic bond

Which bond is the weakest?
Van der Waals

Which bond is the strongest?
Covalent bond

Which gas is used in balloons?
Helium

Which gas is used in fire extinguishers?
Carbon dioxide (CO₂)

Which gas is used in respiration?
Oxygen (O₂)

Which gas is used in photosynthesis?
Carbon dioxide (CO₂)

Which gas is released during photosynthesis?
Oxygen (O₂)

Which acid is present in vinegar?
Acetic acid

Which acid is present in lemon?
Citric acid

Which acid is present in curd?
Lactic acid

Which acid is present in gastric juice?
Hydrochloric acid

Which acid is present in grapes?
Tartaric acid

Which acid is present in apples?
Malic acid

Which acid is present in tea?
Tannic acid

Which acid is present in rhubarb leaves?
Oxalic acid

Which acid is present in proteins?
Amino acid

Which acid is present in DNA?
Nucleic acid

What is the boiling point of water at 1 atm?
100°C

What is the melting point of ice?
0°C

What is the freezing point of water?
0°C

What is the density of water at 4°C?
1 g/cm³

What is the universal solvent?
Water

What is the hardest naturally occurring substance?
Diamond

What is the softest mineral?
Talc

What is the main ore of Aluminum?
Bauxite

What is the main ore of Iron?
Hematite

What is the main ore of Copper?
Chalcopyrite

What is the main ore of Zinc?
Zinc blende

What is the main ore of Lead?
Galena

What is the main ore of Mercury?
Cinnabar

What is the main ore of Magnesium?
Magnesite

What is the main ore of Sodium?
Rock salt

What is the main ore of Gold?
Quartz vein

What is the main ore of Silver?
Argentite

What is the main ore of Tin?
Cassiterite

What is the main ore of Uranium?
Pitchblende

What is the main ore of Chromium?
Chromite

What is the atomic number of Hydrogen?
Answer: 1

What is the atomic number of Oxygen?
Answer: 8

What is the atomic number of Carbon?
Answer: 6

What is the chemical symbol of Sodium?
Answer: Na

What is the chemical symbol of Potassium?
Answer: K

What is the chemical symbol of Calcium?
Answer: Ca

What is the chemical symbol of Gold?
Answer: Au

What is the chemical symbol of Silver?
Answer: Ag

What is the chemical symbol of Iron?
Answer: Fe

What is the molecular weight of Oxygen (O₂)?
Answer: 32 g/mol

What is the molecular weight of Hydrogen (H₂)?
Answer: 2 g/mol

What is the molecular weight of Nitrogen (N₂)?
Answer: 28 g/mol

What is the molecular weight of Carbon dioxide (CO₂)?
Answer: 44 g/mol

What is the molecular weight of Methane (CH₄)?
Answer: 16 g/mol

What is the molecular weight of Water (H₂O)?
Answer: 18 g/mol

Which gas is known as laughing gas?
Answer: Nitrous oxide (N₂O)

Which gas is known as marsh gas?
Answer: Methane (CH₄)

Which gas is known as ozone gas?
Answer: Ozone (O₃)

Which gas is poisonous and binds with hemoglobin?
Answer: Carbon monoxide (CO)

What is the pH of pure water at 25°C?
Answer: 7

Which element has the highest electronegativity?
Answer: Fluorine

Which element has the lowest electronegativity?
Answer: Cesium

What is the chemical formula of Ammonia?
Answer: NH₃

What is the chemical formula of Sulfuric Acid?
Answer: H₂SO₄

What is the chemical formula of Nitric Acid?
Answer: HNO₃

What is the chemical formula of Hydrochloric Acid?
Answer: HCl

What is the chemical formula of Acetic Acid?
Answer: CH₃COOH

What is the chemical formula of Phosphoric Acid?
Answer: H₃PO₄

What is the chemical formula of Sodium Hydroxide?
Answer: NaOH

What is the chemical formula of Potassium Hydroxide?
Answer: KOH

What is the chemical formula of Calcium Hydroxide?
Answer: Ca(OH)₂

What is the chemical formula of Magnesium Hydroxide?
Answer: Mg(OH)₂

What is the chemical formula of Sodium Carbonate?
Answer: Na₂CO₃

What is the chemical formula of Calcium Carbonate?
Answer: CaCO₃

What is the chemical formula of Sodium Bicarbonate?
Answer: NaHCO₃

What is the chemical formula of Ammonium Chloride?
Answer: NH₄Cl

What is the chemical formula of Copper Sulfate?
Answer: CuSO₄

What is the chemical formula of Zinc Sulfate?
Answer: ZnSO₄

What is the chemical formula of Magnesium Sulfate?
Answer: MgSO₄

Which subatomic particle has a negative charge?
Answer: Electron

Which subatomic particle has a positive charge?
Answer: Proton

Which subatomic particle has no charge?
Answer: Neutron

What is the charge of an alpha particle?
Answer: +2

What is the charge of a beta particle?
Answer: -1

What is the charge of a gamma ray?
Answer: 0

What is the SI unit of amount of substance?
Answer: Mole

What is Avogadro’s number?
Answer: 6.022 × 10²³

What is the molar mass of Sodium (Na)?
Answer: 23 g/mol

What is the molar mass of Chlorine (Cl)?
Answer: 35.5 g/mol

What is the molar mass of Potassium (K)?
Answer: 39 g/mol

What is the molar mass of Calcium (Ca)?
Answer: 40 g/mol

What is the molar mass of Magnesium (Mg)?
Answer: 24 g/mol

What is the molar mass of Sulfur (S)?
Answer: 32 g/mol

What is the molar mass of Iron (Fe)?
Answer: 56 g/mol

What is the molar mass of Copper (Cu)?
Answer: 63.5 g/mol

What is the molar mass of Zinc (Zn)?
Answer: 65 g/mol

What is the molar mass of Gold (Au)?
Answer: 197 g/mol

What is the molar mass of Silver (Ag)?
Answer: 108 g/mol

What is the molar mass of Aluminum (Al)?
Answer: 27 g/mol

Which bond is formed by sharing of electrons?
Answer: Covalent bond

Which bond is formed by transfer of electrons?
Answer: Ionic bond

Which bond is formed by metallic atoms?
Answer: Metallic bond

Which bond is the weakest?
Answer: Van der Waals

Which bond is the strongest?
Answer: Covalent bond

Which gas is used in balloons?
Answer: Helium

Which gas is used in fire extinguishers?
Answer: Carbon dioxide (CO₂)

Which gas is used in respiration?
Answer: Oxygen (O₂)

Which gas is used in photosynthesis?
Answer: Carbon dioxide (CO₂)

Which gas is released during photosynthesis?
Answer: Oxygen (O₂)

Which acid is present in vinegar?
Answer: Acetic acid

Which acid is present in lemon?
Answer: Citric acid

Which acid is present in curd?
Answer: Lactic acid

Which acid is present in gastric juice?
Answer: Hydrochloric acid

Which acid is present in grapes?
Answer: Tartaric acid

Which acid is present in apples?
Answer: Malic acid

Which acid is present in tea?
Answer: Tannic acid

Which acid is present in rhubarb leaves?
Answer: Oxalic acid

Which acid is present in proteins?
Answer: Amino acids

Which acid is present in DNA?
Answer: Nucleic acid

What is the boiling point of water at 1 atm?
Answer: 100°C

What is the melting point of ice?
Answer: 0°C

What is the freezing point of water?
Answer: 0°C

What is the density of water at 4°C?
Answer: 1 g/cm³

What is the universal solvent?
Answer: Water

What is the hardest naturally occurring substance?
Answer: Diamond

What is the softest mineral?
Answer: Talc

What is the main ore of Aluminum?
Answer: Bauxite

What is the main ore of Iron?
Answer: Hematite

What is the main ore of Copper?
Answer: Chalcopyrite

What is the main ore of Zinc?
Answer: Zinc blende

What is the main ore of Lead?
Answer: Galena

What is the main ore of Mercury?
Answer: Cinnabar

What is the main ore of Magnesium?
Answer: Magnesite

What is the main ore of Sodium?
Answer: Rock salt

What is the main ore of Gold?
Answer: Quartz vein

What is the main ore of Silver?
Answer: Argentite

What is the main ore of Tin?
Answer: Cassiterite

What is the main ore of Uranium?
Answer: Pitchblende

What is the main ore of Chromium?
Answer: Chromite

What is the main ore of Nickel?
Answer: Pentlandite

What is the atomic number of Hydrogen?
Answer: 1

What is the atomic number of Oxygen?
Answer: 8

What is the atomic number of Carbon?
Answer: 6

What is the chemical symbol of Sodium?
Answer: Na

What is the chemical symbol of Potassium?
Answer: K

What is the chemical symbol of Calcium?
Answer: Ca

What is the chemical symbol of Gold?
Answer: Au

What is the chemical symbol of Silver?
Answer: Ag

What is the chemical symbol of Iron?
Answer: Fe

What is the molecular weight of Oxygen (O₂)?
Answer: 32 g/mol

What is the molecular weight of Hydrogen (H₂)?
Answer: 2 g/mol

What is the molecular weight of Nitrogen (N₂)?
Answer: 28 g/mol

What is the molecular weight of Carbon dioxide (CO₂)?
Answer: 44 g/mol

What is the molecular weight of Methane (CH₄)?
Answer: 16 g/mol

What is the molecular weight of Water (H₂O)?
Answer: 18 g/mol

Which gas is known as laughing gas?
Answer: Nitrous oxide (N₂O)

Which gas is known as marsh gas?
Answer: Methane (CH₄)

Which gas is known as ozone gas?
Answer: Ozone (O₃)

Which gas is poisonous and binds with hemoglobin?
Answer: Carbon monoxide (CO)

What is the pH of pure water at 25°C?
Answer: 7

Which element has the highest electronegativity?
Answer: Fluorine

Which element has the lowest electronegativity?
Answer: Cesium

What is the chemical formula of Ammonia?
Answer: NH₃

What is the chemical formula of Sulfuric Acid?
Answer: H₂SO₄

What is the chemical formula of Nitric Acid?
Answer: HNO₃

What is the chemical formula of Hydrochloric Acid?
Answer: HCl

What is the chemical formula of Acetic Acid?
Answer: CH₃COOH

What is the chemical formula of Phosphoric Acid?
Answer: H₃PO₄

What is the chemical formula of Sodium Hydroxide?
Answer: NaOH

What is the chemical formula of Potassium Hydroxide?
Answer: KOH

What is the chemical formula of Calcium Hydroxide?
Answer: Ca(OH)₂

What is the chemical formula of Magnesium Hydroxide?
Answer: Mg(OH)₂

What is the chemical formula of Sodium Carbonate?
Answer: Na₂CO₃

What is the chemical formula of Calcium Carbonate?
Answer: CaCO₃

What is the chemical formula of Sodium Bicarbonate?
Answer: NaHCO₃

What is the chemical formula of Ammonium Chloride?
Answer: NH₄Cl

What is the chemical formula of Copper Sulfate?
Answer: CuSO₄

What is the chemical formula of Zinc Sulfate?
Answer: ZnSO₄

What is the chemical formula of Magnesium Sulfate?
Answer: MgSO₄

Which subatomic particle has a negative charge?
Answer: Electron

Which subatomic particle has a positive charge?
Answer: Proton

Which subatomic particle has no charge?
Answer: Neutron

What is the charge of an alpha particle?
Answer: +2

What is the charge of a beta particle?
Answer: -1

What is the charge of a gamma ray?
Answer: 0

What is the SI unit of amount of substance?
Answer: Mole

What is Avogadro’s number?
Answer: 6.022 × 10²³

What is the molar mass of Sodium (Na)?
Answer: 23 g/mol

What is the molar mass of Chlorine (Cl)?
Answer: 35.5 g/mol

What is the molar mass of Potassium (K)?
Answer: 39 g/mol

What is the molar mass of Calcium (Ca)?
Answer: 40 g/mol

What is the molar mass of Magnesium (Mg)?
Answer: 24 g/mol

What is the molar mass of Sulfur (S)?
Answer: 32 g/mol

What is the molar mass of Iron (Fe)?
Answer: 56 g/mol

What is the molar mass of Copper (Cu)?
Answer: 63.5 g/mol

What is the molar mass of Zinc (Zn)?
Answer: 65 g/mol

What is the molar mass of Gold (Au)?
Answer: 197 g/mol

What is the molar mass of Silver (Ag)?
Answer: 108 g/mol

What is the molar mass of Aluminum (Al)?
Answer: 27 g/mol

Which bond is formed by sharing of electrons?
Answer: Covalent bond

Which bond is formed by transfer of electrons?
Answer: Ionic bond

Which bond is formed by metallic atoms?
Answer: Metallic bond

Which bond is the weakest?
Answer: Van der Waals

Which bond is the strongest?
Answer: Covalent bond

Which gas is used in balloons?
Answer: Helium

Which gas is used in fire extinguishers?
Answer: Carbon dioxide (CO₂)

Which gas is used in respiration?
Answer: Oxygen (O₂)

Which gas is used in photosynthesis?
Answer: Carbon dioxide (CO₂)

Which gas is released during photosynthesis?
Answer: Oxygen (O₂)

Which acid is present in vinegar?
Answer: Acetic acid

Which acid is present in lemon?
Answer: Citric acid

Which acid is present in curd?
Answer: Lactic acid

Which acid is present in gastric juice?
Answer: Hydrochloric acid

Which acid is present in grapes?
Answer: Tartaric acid

Which acid is present in apples?
Answer: Malic acid

Which acid is present in tea?
Answer: Tannic acid

Which acid is present in rhubarb leaves?
Answer: Oxalic acid

Which acid is present in proteins?
Answer: Amino acids

Which acid is present in DNA?
Answer: Nucleic acid

What is the boiling point of water at 1 atm?
Answer: 100°C

What is the melting point of ice?
Answer: 0°C

What is the freezing point of water?
Answer: 0°C

What is the density of water at 4°C?
Answer: 1 g/cm³

What is the universal solvent?
Answer: Water

What is the hardest naturally occurring substance?
Answer: Diamond

What is the softest mineral?
Answer: Talc

What is the main ore of Aluminum?
Answer: Bauxite

What is the main ore of Iron?
Answer: Hematite

What is the main ore of Copper?
Answer: Chalcopyrite

What is the main ore of Zinc?
Answer: Zinc blende

What is the main ore of Lead?
Answer: Galena

What is the main ore of Mercury?
Answer: Cinnabar

What is the main ore of Magnesium?
Answer: Magnesite

What is the main ore of Sodium?
Answer: Rock salt

What is the main ore of Gold?
Answer: Quartz vein

What is the main ore of Silver?
Answer: Argentite

What is the main ore of Tin?
Answer: Cassiterite

What is the main ore of Uranium?
Answer: Pitchblende

What is the main ore of Chromium?
Answer: Chromite

What is the main ore of Nickel?
Answer: Pentlandite