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