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