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