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