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