A) Oxygen and hydrogen B) Sulphur and oxygen C) Nitrogen and oxygen D) Carbon and oxygen
A) CH2 B) C2H4 C) CH3 D) CH4
A) CH4O B) CH3O C) CH2O D) CHO
A) C2H3 B) C2H5 C) CH2 D) CH
A) X2Y B) XY2 C) X2Y3 D) X3Y2
A) 1 and 3 B) 2 and 3 C) 8 and 2 D) 6 and 2
A) 32g B) 24g C) 18g D) 21g
A) Atomic mass B) Molar mass C) Oxidation numbers D) No of moles
A) -7 B) -5 C) +8 D) +7
A) Fractional distillation B) Boiling off the ethanol C) Filtration D) Fractional crystallisation
A) Evaporation B) Sublimation C) Crystallisation D) Melting
A) An insoluble substance from a soluble substance B) Liquids with different boiling points C) Substances which differ in their solubilities in a solvent D) Gaseous, liquid or solid impurities from a mixture
A) Sublimation B) Crystallisation C) Distillation D) Separating funnel
A) 10 B) 32 C) 20 D) 22
A) 57.5% B) 42.5% C) 40.4% D) 73.0%
A) 42.66% B) 14.71% C) 21.33% D) 28.07%
A) 586 B) 685 C) 865 D) 621
A) 328 B) 164 C) 160 D) 346
A) 2 B) 3 C) 4 D) 1
A) Sulphur B) Chlorine C) Argon D) Potassium
A) Electrons from one atom to another B) Protons between two atoms C) Electrons between two atoms D) Neutrons between two atoms
A) NaCl B) NH3 C) CO2 D) H2O
A) Sharing of electrons between atoms B) Presence of positive ions in a sea of delocalized electrons C) Formation of covalent bonds between atoms D) Transfer of electrons between atoms
A) Iron B) Sodium chloride C) Water D) Carbon dioxide
A) Electronegativity difference between atoms B) Electron affinity of atoms C) Atomic radius of atoms D) All of the above
A) Oxygen B) Nitrogen C) Carbon D) Helium
A) Ammonia (NH3) B) Carbon dioxide (CO2) C) Ethanol (C2H5OH) D) Methane (CH4)
A) Strong covalent bonds between atoms B) Weak intramolecular forces within molecules C) Weak intermolecular forces between molecules D) Strong electrostatic attractions between ions
A) Methane (CH4) B) Sodium chloride (NaCl) C) Hydrogen peroxide (H2O2) D) Ethanol (C2H5OH)
A) Have fixed positions in a lattice structure B) Have strong intermolecular forces of attraction C) Are closely packed together D) Have negligible volume compared to the space they occupy
A) The density of particles within a gas B) The arrangement 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 highly compressed and far apart C) Have particles that are closely packed together and vibrate in fixed positions D) Have particles that are far apart and moving randomly
A) Melting of ice B) Digestion of food C) Rusting of iron D) Burning of wood
A) Volume and number of moles of a gas B) Pressure and temperature of a gas C) Temperature and volume of a gas D) Pressure and volume of a gas
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) Boyle's law and Charles's law B) Boyle's law and Avogadro's law C) Charles's law and Avogadro's law D) Boyle's law, Charles's law, and Avogadro's law
A) PV = nT B) PV = RT C) PV = nRT D) P = V/nRT
A) Square root of its molar mass B) Temperature C) Pressure D) Volume
A) Volume B) Number of moles C) Density D) Atomic mass
A) Atoms in one mole of a substance B) Moles in one liter of a gas C) Electrons in one atom of a substance D) Particles in one gram of a substance
A) 0.224 L/mol B) 224 L/mol C) 2.24 L/mol D) 22.4 L/mol
A) Infrared spectroscopy B) Nuclear magnetic resonance C) Analyzing the mass of each element in the compound D) Mass spectrometry
A) Carbon dioxide B) Oxygen C) Nitrogen D) Hydrogen
A) Non-luminous zone B) Luminous zone C) Inner cone D) Outer cone
A) Have a pH greater than 7 B) Release hydrogen ions (H+) in water C) Have a sour taste D) Release hydroxide ions (OH-) in water
A) A pH greater than 7 B) A pH less than 7 C) A low concentration of solute in a given volume of solvent D) A high concentration of solute in a given volume of solvent
A) Partially ionize in water B) Are highly corrosive C) Have a high pH 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) Hydrochloric acid (HCl) B) Nitric acid (HNO3) C) Acetic acid (CH3COOH) D) Sulfuric acid (H2SO4)
A) Food preservation B) pH regulation C) All of the above D) Household cleaning |