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