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