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