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