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