A) Atomic number B) Mass number C) Oxidation number D) Number of electrons
A) Calcium B) Iron C) Silver D) Potassium
A) 2- chloro but-I ,3-diene. B) 2-chloro but-diene. C) 3 -chloro but -1.3-diene. D) But-1,3-chlorodiene.
A) Halides B) Anions C) Halogens D) Cations
A) +5 B) +3 C) +1 D) +6
A) C2H5OH B) C4H9OH C) CH3OH D) C3H7OH
A) The reaction has gone to completion B) The rates of the forward and backward reactions are equal C) All reactions cease to occur D) The amount of product equals the amount of reactants
A) Dative B) Covalent C) Electrovalent D) Hydrogen
A) Hund's rule B) Pauli's exclusion principle C) Periodic law D) Afbau's principle
A) Zinc B) Sodium C) Copper D) Potassium
A) Larger Atomic Size B) Smaller Atomic size C) Lower melting point D) Greater number of valence electrons
A) Gaining of electrons B) Losing of electrons C) Hybridization of Orbitals D) Sharing electrons
A) Carbon (II) oxide B) Hydrogen Sulphide C) Plastic D) Sewage
A) Favourable climate condition B) Nearness to industrial establishment C) Nearness to raw materials D) Availability of storage facilities
A) Water B) Ethene C) Oxygen D) Carbon (IV) oxide
A) Geometrical B) Positional C) Optical D) Functional
A) C6H12O B) C12H12O11 C) C3H8O D) C6H12O2
A) Total pressure B) partial pressure C) Vapour pressure D) Atmospheric pressure
A) Distillation B) Electrolysis C) Crystalization D) Chromatography
A) Valence shells B) Valence electrons C) Core electrons D) Electrons
A) Slow B) Spontaneous C) Endothermic D) Exothermic
A) Multiple proportion B) Constant composition C) conservation of mass D) conservation of energy
A) 0.25 mol B) 0.20 mol C) 0.40 mol D) 0.50 mol
A) are metals B) form colourless salts C) form cations D) have same number of valence electrons
A) Concentrated B) Saturated C) Unsaturated D) Diluted
A) An orbital B) A quanta C) A field D) A spectra
A) Conduct electricity in its solid state B) Dissolve in polar solvent C) Have mobile electrons D) Have low boiling points
A) 965 C B) 96500 C C) 9650 C D) 9.65 C
A) Saponification B) esterification C) Halogenation D) Carboxylation
A) Hydrogen B) Ethene C) Methane D) Sulphur
A) Pentane B) Propane C) Benzene D) Hexane
A) filling the orbitals with lower energy first B) the filling of degenerated orbitals C) quantity of electrons in the valence shell D) quantum numbers of electrons
A) they belong to the same period B) oxygen is more reactive than nitrogen C) of the difference in their boiling points D) nitrogen is less dense than oxygen
A) 8.00gdm−3 B) 0.08gdm−3 C) 2.00gdm−3 D) 80.00gdm−3
A) a single cation in its aqueous solution B) hydrogen atoms in its aqueous solution C) hydrogen ions in its aqueous solution D) double anions in its aqueous solution
A) heat of formation of reactants exceeds heat of formation of products B) enthalpy change is negative C) reaction vessel feels cool during the reaction D) bond forming energy exceeds bond breaking energy
A) CH4 B) HCl C) NaH D) NH3
A) C4H8 B) C2H4 C) C3H6 D) C3H4
A) 96.0g B) 76.0g C) 66.0g D) 80.0g
A) valence electrons increase across the period while the valence shell remains constant B) nuclear charge decreases while the distance of the valence shell from the nucleus is increasing C) nuclear charge increases while the outermost electrons are drawn closer to the nucleus D) nuclear charge decreases while the outermost electrons are drawn closer to the nucleus
A) +4 B) +5 C) +2 D) +3
A) Al B) Na C) K D) Mg
A) high melting point B) durability C) hardness D) octahedral shape
A) 10.00 B) 1000.00 C) 0.01 D) 100.00
A) conduct electricity B) form carbon(IV) oxide on combustion C) have same density D) have octahedral shape
A) a base B) an oxidizing agent C) an acid D) a reducing agent
A) 0.0245g B) 0.490g C) 0.049g D) 0.245g
A) 30°C B) 40°C C) 20°C D) 0°C
A) mechanism of electrolysis B) electrolytic reactions C) nature of the electrode D) electrochemical reactions
A) 1s orbital B) 2px C) 2s orbital D) 3s orbital
A) water B) carbon(IV) oxide C) fire blanket D) sand
A) Formation of salt and water with alkalis B) Formation of salt and hydrogen gas with reactive metals C) Evolution of carbon dioxide gas when added to a trioxocarbonate (IV) salt D) Evolution of ammonia when heated with ammonium salts
A) 2.4 × 1022 B) 2.4 × 1023 C) 1.2 × 1023 D) 1.2 × 1022
A) Na2SO4 B) FeSO4 C) CuSO4 D) PbSO4
A) manufacture of cement B) combustion C) production of ammonia D) photosynthesis
A) 30cm3 B) 75cm3 C) 25cm3 D) 150cm3
A) boiling point B) mass C) heat capacity D) colour
A) = 7 B) < 7 C) > 7 D) 0
A) Ionization potential B) Catalytic ability C) Electron Affinity D) Electronegativity
A) random and translational motion B) vibrational and translational motion C) vibrational and random motion D) vibrational motion |