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