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