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