A) Methane B) Ethene C) Sulphur D) Hydrogen
A) Pentane B) Propane C) Hexane D) Benzene
A) reduction B) oxidation C) decomposition D) sublimation
A) the filling of degenerated orbitals B) filling the orbitals with lower energy first C) quantity of electrons in the valence shell D) quantum numbers of electrons
A) oxygen is more reactive than nitrogen B) they belong to the same period C) nitrogen is less dense than oxygen D) of the difference in their boiling points
A) 0.08gdm−3 B) 2.00gdm−3 C) 8.00gdm−3 D) 80.00gdm−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) bond forming energy exceeds bond breaking energy B) reaction vessel feels cool during the reaction C) heat of formation of reactants exceeds heat of formation of products D) enthalpy change is negative
A) NH3 B) HCl C) NaH D) CH4
A) C3H4 B) C3H6 C) C4H8 D) C2H4
A) 96.0g B) 66.0g C) 76.0g D) 80.0g
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) +5 B) +4 C) +2 D) +3
A) Al B) Mg C) K D) Na
A) distance of the outermost electron(s) from the nucleus B) screening effect of the inner electron(s) C) ability to attract shared electron(s) D) size of the positive nuclear charge
A) Ionic compounds in solution would conduct electricity B) Covalent compounds consist of ions C) Covalent compounds would readily ionize in solution D) Hydrogen bond is formed between a metal and a non-metal
A) high melting point B) durability C) hardness D) octahedral shape
A) A catalyst is required B) It occurs reversibly C) Heat energy is absorbed D) Activation energy is high
A) 0.01 B) 10.00 C) 1000.00 D) 100.00
A) form carbon(IV) oxide on combustion B) have same density C) have octahedral shape D) conduct electricity
A) an oxidizing agent B) an acid C) a reducing agent D) a base
A) hydrolysis B) ozonolysis C) decomposition D) dehydration
A) 0.245g B) 0.0245g C) 0.049g D) 0.490g
A) decreasing the external pressure B) distilling it C) increasing the external pressure D) reducing its quantity
A) 0°C B) 20°C C) 40°C D) 30°C
A) precipitates and the solution remains unchanged B) dissolves and the solution becomes unsaturated C) dissolves and the solution becomes super saturated D) dissolves and crystals are formed
A) propane B) propanol C) propanoic acid D) propyne
A) electrolytic reactions B) nature of the electrode C) mechanism of electrolysis D) electrolytic reactions
A) 2px B) 1s orbital C) 2s orbital D) 3s orbital
A) carbon(IV) oxide B) fire blanket C) water D) sand
A) Evolution of carbon dioxide gas when added to a trioxocarbonate (IV) salt B) Formation of salt and water with alkalis C) Formation of salt and hydrogen gas with reactive metals D) Evolution of ammonia when heated with ammonium salts
A) 1.2 × 1023 B) 2.4 × 1023 C) 2.4 × 1022 D) 1.2 × 1022
A) CH2 B) CH3 C) CH4 D) CH
A) salts B) alkalis C) bases D) acids
A) strong cohesive forces make its ions immobile B) it is a covalent compound C) strong cohesive force makes its molecule immobile D) each of potassium and chlorine structures contain noble gas structure
A) PbSO4 B) CuSO4 C) Na2SO4 D) FeSO4
A) combustion B) photosynthesis C) manufacture of cement D) production of ammonia
A) 30cm3 B) 75cm3 C) 25cm3 D) 150cm3
A) heat capacity B) colour C) mass D) boiling point
A) = 7 B) < 7 C) 0 D) > 7
A) decomposed B) oxidised C) dissociated D) reduced
A) +3 to 0 B) +3 to +2 C) 0 to +2 D) +2 to +3
A) the electrode dissolves B) oxidation is involved C) electrons are consumed D) ions are reduced
A) +2 to -2 B) +2 to +4 C) +2 to 0 D) +4 to +2
A) Successive members undergo changes in molecular formula by CH2 B) The chemical property change gradually throughout the series C) physical properties of members are similar D) They have the same molecular formula
A) 0.64g B) 0.45g C) 0.67g D) 6.40g
A) number of alkyl groups bonded to the carbon having the hydroxyl group B) number of carbon atoms present in the compound C) molecular mass of the compound D) molecular formula of the compound
A) propyl pentanoate B) propyl butanoate C) pentyl propanoate D) butyl propanoate
A) increases as nuclear charge increases B) remains constant as nuclear charge increases C) decreases as nuclear charge increases D) decreases as nuclear charge decreases
A) 2:3 B) 2:1 C) 1:2 D) 1:1
A) contain equal number of protons and electrons B) do not conduct electricity C) are composed of neutrons and electrons D) cannot be attracted by electromagnetic field
A) Nitrogen(II) oxide and Carbon(IV) oxide B) Carbon(II) oxide and oxygen C) Carbon(IV) oxide and Nitrogen D) Carbon(II) oxide and Sulphur(IV) oxide
A) mannose B) maltose C) galactose D) sucrose
A) 2-chloropropanol B) 1-chloroethanol C) 1- chloropropanol D) 2-chloroethanol
A) excessive ultraviolet light from the sun to reach the earth surface B) corrosive effect of the chemicals on humans and animals C) acidic effect of chemicals on humans D) excessive release of infrared light from the sun to the earth surface
A) cannot be regenerated once used up B) is formed naturally C) is cheap D) can be recycled after use
A) vibrational and random motion B) random and translational motion C) vibrational motion D) vibrational and translational motion
A) 1.0gdm−3 B) 0.2gdm−3 C) 2.0gdm−3 D) 5.0gdm−3
A) activation energy B) equilibrium position C) free energy D) enthalpy change
A) Crystalline nature B) Relative density C) Solubility in water D) Melting point |