A) Oxygen and hydrogen B) Nitrogen and oxygen C) Carbon and oxygen D) Sulphur and oxygen
A) CH3 B) CH2 C) C2H4 D) CH4
A) CH2O B) CH3O C) CH4O D) CHO
A) CH B) C2H3 C) CH2 D) C2H5
A) X3Y2 B) X2Y C) X2Y3 D) XY2
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) -7 B) -5 C) +8 D) +7
A) Fractional distillation B) Fractional crystallisation C) Filtration D) Boiling off the ethanol
A) Evaporation B) Melting C) Sublimation D) Crystallisation
A) Substances which differ in their solubilities in a solvent B) An insoluble substance from a soluble substance C) Liquids with different boiling points D) Gaseous, liquid or solid impurities from a mixture
A) Separating funnel B) Crystallisation C) Distillation D) Sublimation
A) 22 B) 10 C) 20 D) 32
A) 73.0% B) 40.4% C) 42.5% D) 57.5%
A) 21.33% B) 28.07% C) 14.71% D) 42.66%
A) 865 B) 586 C) 621 D) 685
A) 160 B) 328 C) 164 D) 346
A) 4 B) 2 C) 3 D) 1
A) Potassium B) Chlorine C) Sulphur D) Argon
A) Neutrons between two atoms B) Protons between two atoms C) Electrons from one atom to another D) Electrons between two atoms
A) NH3 B) CO2 C) NaCl D) H2O
A) Transfer of electrons between atoms B) Formation of covalent bonds between atoms C) Sharing of electrons between atoms D) Presence of positive ions in a sea of delocalized electrons
A) Iron B) Sodium chloride C) Water D) Carbon dioxide
A) All of the above B) Atomic radius of atoms C) Electronegativity difference between atoms D) Electron affinity of atoms
A) Helium B) Carbon C) Oxygen D) Nitrogen
A) Methane (CH4) B) Carbon dioxide (CO2) C) Ethanol (C2H5OH) D) Ammonia (NH3)
A) Strong covalent bonds between atoms B) Weak intramolecular forces within molecules C) Weak intermolecular forces between molecules D) Strong electrostatic attractions between ions
A) Methane (CH4) B) Hydrogen peroxide (H2O2) C) Ethanol (C2H5OH) D) Sodium chloride (NaCl)
A) Have negligible volume compared to the space they occupy B) Have strong intermolecular forces of attraction C) Have fixed positions in a lattice structure D) Are closely packed together
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 closely packed together and vibrate in fixed positions B) Have particles that are far apart and moving randomly C) Have particles that are highly compressed and free to move D) Have particles that are highly compressed and far apart
A) Burning of wood B) Melting of ice C) Digestion of food D) Rusting of iron
A) Temperature and volume of a gas B) Pressure and volume of a gas C) Pressure and temperature of a gas D) Volume and number of moles of a gas
A) Pressure and volume of a gas B) Volume and number of moles of a gas C) Temperature and volume of a gas D) Pressure and temperature of a gas
A) Boyle's law and Charles's law B) Charles's law and Avogadro's law C) Boyle's law and Avogadro's law D) Boyle's law, Charles's law, and Avogadro's law
A) PV = nT B) P = V/nRT C) PV = nRT D) PV = RT
A) Volume B) Square root of its molar mass C) Pressure D) Temperature
A) Density B) Number of moles C) Atomic mass D) Volume
A) Particles in one gram of a substance B) Moles in one liter of a gas C) Atoms in one mole of a substance D) Electrons in one atom of a substance
A) 22.4 L/mol B) 224 L/mol C) 2.24 L/mol D) 0.224 L/mol
A) Analyzing the mass of each element in the compound B) Infrared spectroscopy C) Nuclear magnetic resonance D) Mass spectrometry
A) Hydrogen B) Oxygen C) Nitrogen D) Carbon dioxide
A) Inner cone B) Outer cone C) Non-luminous zone D) Luminous zone
A) Release hydrogen ions (H+) in water B) Have a pH greater than 7 C) Release hydroxide ions (OH-) in water D) Have a sour taste
A) A high concentration of solute in a given volume of solvent B) A pH less than 7 C) A low concentration of solute in a given volume of solvent D) A pH greater than 7
A) Completely ionize in water B) Partially ionize in water C) Have a high pH D) Are highly corrosive
A) Are non-reactive B) Partially ionize in water C) Have a low pH D) Do not ionize in water
A) Nitric acid (HNO3) B) Acetic acid (CH3COOH) C) Hydrochloric acid (HCl) D) Sulfuric acid (H2SO4)
A) All of the above B) Household cleaning C) pH regulation D) Food preservation |