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