PES SS 2 Chemistry Mock 3 Exam 2024/25
A) Ethene B) Hydrogen C) Methane D) Sulphur
A) Pentane B) Propane C) Hexane D) Benzene
A) oxidation B) reduction C) sublimation D) decomposition
A) filling the orbitals with lower energy first B) the filling of degenerated orbitals C) quantity of electrons in the valence shell D) quantum numbers of electrons
A) of the difference in their boiling points B) they belong to the same period C) nitrogen is less dense than oxygen D) oxygen is more reactive than nitrogen
A) 80.00gdm−3 B) 2.00gdm−3 C) 0.08gdm−3 D) 8.00gdm−3
A) a single cation in its aqueous solution B) hydrogen atoms in its aqueous solution C) hydrogen ions in its aqueous solution D) double anions in its aqueous solution
A) enthalpy change is negative B) bond forming energy exceeds bond breaking energy C) heat of formation of reactants exceeds heat of formation of products D) reaction vessel feels cool during the reaction
A) CH4 B) NH3 C) NaH D) HCl
A) C4H8 B) C3H4 C) C2H4 D) C3H6
A) 96.0g B) 66.0g C) 80.0g D) 76.0g
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) 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) +2 B) +4 C) +5 D) +3
A) Al B) Na C) K D) Mg
A) size of the positive nuclear charge B) screening effect of the inner electron(s) C) ability to attract shared 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) 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) durability C) high melting point D) hardness
A) A catalyst is required B) It occurs reversibly C) Heat energy is absorbed D) Activation energy is high
A) 100.00 B) 1000.00 C) 0.01 D) 10.00
A) form carbon(IV) oxide on combustion B) have octahedral shape C) have same density D) conduct electricity
A) an oxidizing agent B) an acid C) a reducing agent D) a base
A) hydrolysis B) dehydration C) decomposition D) ozonolysis
A) 0.049g B) 0.0245g C) 0.245g D) 0.490g
A) increasing the external pressure B) reducing its quantity C) decreasing the external pressure D) distilling it 
A) 0°C B) 40°C C) 20°C D) 30°C
A) dissolves and crystals are formed B) precipitates and the solution remains unchanged C) dissolves and the solution becomes unsaturated D) dissolves and the solution becomes super saturated
A) propane B) propanoic acid C) propyne D) propanol
A) nature of the electrode B) electrolytic reactions C) electrolytic reactions D) mechanism of electrolysis
A) 3s orbital B) 2px C) 2s orbital D) 1s orbital
A) sand B) fire blanket C) carbon(IV) oxide D) water
A) Formation of salt and hydrogen gas with reactive metals B) Formation of salt and water with alkalis C) Evolution of ammonia when heated with ammonium salts D) Evolution of carbon dioxide gas when added to a trioxocarbonate (IV) salt
A) 1.2 × 1023 B) 2.4 × 1023 C) 2.4 × 1022 D) 1.2 × 1022
A) CH3 B) CH2 C) CH4 D) CH
A) bases B) acids C) alkalis D) salts
A) it is a covalent compound B) strong cohesive force makes its molecule immobile C) strong cohesive forces make its ions immobile D) each of potassium and chlorine structures contain noble gas structure
A) Na2SO4 B) FeSO4 C) CuSO4 D) PbSO4
A) production of ammonia B) combustion C) photosynthesis D) manufacture of cement
A) 75cm3 B) 25cm3 C) 150cm3 D) 30cm3
A) mass B) colour C) heat capacity D) boiling point
A) = 7 B) 0 C) > 7 D) < 7
A) reduced B) oxidised C) decomposed D) dissociated
A) 0 to +2 B) +2 to +3 C) +3 to +2 D) +3 to 0
A) the electrode dissolves B) ions are reduced C) oxidation is involved D) electrons are consumed
A) +2 to 0 B) +2 to -2 C) +2 to +4 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) 0.45g B) 0.64g C) 6.40g D) 0.67g
A) number of alkyl groups bonded to the carbon having the hydroxyl group B) molecular mass of the compound C) number of carbon atoms present in the compound D) molecular formula of the compound
A) propyl butanoate B) propyl pentanoate C) pentyl propanoate D) butyl propanoate
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) 2:3 B) 1:2 C) 1:1 D) 2:1
A) contain equal number of protons and electrons B) cannot be attracted by electromagnetic field C) do not conduct electricity D) are composed of neutrons and electrons
A) Nitrogen(II) oxide and Carbon(IV) oxide B) Carbon(II) oxide and oxygen C) Carbon(IV) oxide and Nitrogen D) Carbon(II) oxide and Sulphur(IV) oxide
A) mannose B) sucrose C) galactose D) maltose
A) 1-chloroethanol B) 2-chloropropanol C) 2-chloroethanol D) 1- chloropropanol
A) excessive release of infrared light from the sun to the earth surface B) corrosive effect of the chemicals on humans and animals C) acidic effect of chemicals on humans D) excessive ultraviolet light from the sun to reach the earth surface
A) can be recycled after use B) is cheap C) cannot be regenerated once used up D) is formed naturally
A) vibrational and random motion B) vibrational and translational motion C) vibrational motion D) random and translational motion
A) 2.0gdm−3 B) 1.0gdm−3 C) 5.0gdm−3 D) 0.2gdm−3
A) enthalpy change B) activation energy C) free energy D) equilibrium position
A) Melting point B) Relative density C) Solubility in water D) Crystalline nature |
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