A) Oxygen and hydrogen B) Nitrogen and oxygen C) Carbon and oxygen D) Sulphur and oxygen
A) CH2 B) C2H4 C) CH3 D) CH4
A) CH2O B) CH4O C) CHO D) CH3O
A) CH B) CH2 C) C2H5 D) C2H3
A) X3Y2 B) X2Y C) X2Y3 D) XY2
A) 8 and 2 B) 2 and 3 C) 6 and 2 D) 1 and 3
A) 32g B) 21g C) 24g D) 18g
A) Oxidation numbers B) Atomic mass C) No of moles D) Molar mass
A) -7 B) +7 C) +8 D) -5
A) Boiling off the ethanol B) Fractional crystallisation C) Filtration D) Fractional distillation
A) Evaporation B) Crystallisation C) Sublimation D) Melting
A) An insoluble substance from a soluble substance B) Substances which differ in their solubilities in a solvent C) Liquids with different boiling points D) Gaseous, liquid or solid impurities from a mixture
A) Distillation B) Sublimation C) Crystallisation D) Separating funnel
A) 10 B) 20 C) 22 D) 32
A) 42.5% B) 73.0% C) 57.5% D) 40.4%
A) 28.07% B) 21.33% C) 42.66% D) 14.71%
A) 685 B) 586 C) 621 D) 865
A) 164 B) 346 C) 328 D) 160
A) 2 B) 3 C) 4 D) 1
A) Chlorine B) Sulphur C) Potassium D) Argon
A) Electrons between two atoms B) Neutrons between two atoms C) Protons between two atoms D) Electrons from one atom to another
A) NaCl B) NH3 C) CO2 D) H2O
A) Transfer of electrons between atoms B) Sharing of electrons between atoms C) Presence of positive ions in a sea of delocalized electrons D) Formation of covalent bonds between atoms
A) Water B) Sodium chloride C) Carbon dioxide D) Iron
A) Electronegativity difference between atoms B) Electron affinity of atoms C) Atomic radius of atoms D) All of the above
A) Carbon B) Helium C) Nitrogen D) Oxygen
A) Ethanol (C2H5OH) B) Methane (CH4) C) Ammonia (NH3) D) Carbon dioxide (CO2)
A) Weak intramolecular forces within molecules B) Strong electrostatic attractions between ions C) Strong covalent bonds between atoms D) Weak intermolecular forces between molecules
A) Sodium chloride (NaCl) B) Ethanol (C2H5OH) C) Methane (CH4) D) Hydrogen peroxide (H2O2)
A) Are closely packed together B) Have strong intermolecular forces of attraction C) Have negligible volume compared to the space they occupy D) Have fixed positions in a lattice structure
A) The motion of particles within a gas B) The chemical reactions occurring within a gas C) The arrangement of particles within a gas D) The density of particles within a gas
A) Have particles that are closely packed together and vibrate in fixed positions B) Have particles that are far apart and moving randomly C) Have particles that are highly compressed and free to move D) Have particles that are highly compressed and far apart
A) Digestion of food B) Burning of wood C) Melting of ice D) Rusting of iron
A) Pressure and temperature of a gas B) Temperature and volume of a gas C) Pressure and volume of a gas D) Volume and number of moles of a gas
A) Pressure and temperature of a gas B) Pressure and volume of a gas C) Volume and number of moles of a gas D) Temperature and volume of a gas
A) Boyle's law, Charles's law, and Avogadro's law B) Charles's law and Avogadro's law C) Boyle's law and Avogadro's law D) Boyle's law and Charles's law
A) P = V/nRT B) PV = nT C) PV = nRT D) PV = RT
A) Square root of its molar mass B) Temperature C) Pressure D) Volume
A) Density B) Number of moles C) Volume D) Atomic mass
A) Atoms in one mole of a substance B) Particles in one gram of a substance C) Moles in one liter of a gas D) Electrons in one atom of a substance
A) 224 L/mol B) 2.24 L/mol C) 0.224 L/mol D) 22.4 L/mol
A) Mass spectrometry B) Analyzing the mass of each element in the compound C) Nuclear magnetic resonance D) Infrared spectroscopy
A) Oxygen B) Hydrogen C) Nitrogen D) Carbon dioxide
A) Non-luminous zone B) Luminous zone C) Outer cone D) Inner cone
A) Have a sour taste B) Have a pH greater than 7 C) Release hydrogen ions (H+) in water D) Release hydroxide ions (OH-) in water
A) A low concentration of solute in a given volume of solvent B) A pH greater than 7 C) A pH less than 7 D) A high concentration of solute in a given volume of solvent
A) Partially ionize in water B) Are highly corrosive C) Have a high pH D) Completely ionize in water
A) Have a low pH B) Do not ionize in water C) Partially ionize in water D) Are non-reactive
A) Acetic acid (CH3COOH) B) Hydrochloric acid (HCl) C) Nitric acid (HNO3) D) Sulfuric acid (H2SO4)
A) pH regulation B) All of the above C) Household cleaning D) Food preservation |