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