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