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