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