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