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