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