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