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