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