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