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