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