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