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