PES SS 2 Chemistry Mock 3 Exam 2024/25
A) Sulphur B) Ethene C) Hydrogen D) Methane
A) Hexane B) Pentane C) Benzene D) Propane
A) sublimation B) reduction C) decomposition D) oxidation
A) quantum numbers of electrons B) filling the orbitals with lower energy first C) the filling of degenerated orbitals D) quantity of electrons in the valence shell
A) oxygen is more reactive than nitrogen B) of the difference in their boiling points C) nitrogen is less dense than oxygen D) they belong to the same period
A) 0.08gdm−3 B) 80.00gdm−3 C) 8.00gdm−3 D) 2.00gdm−3
A) hydrogen atoms in its aqueous solution B) a single cation in its aqueous solution C) double anions in its aqueous solution D) hydrogen ions 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) HCl C) NH3 D) NaH
A) C4H8 B) C3H4 C) C3H6 D) C2H4
A) 66.0g B) 80.0g C) 76.0g D) 96.0g
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) 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) +4 B) +2 C) +3 D) +5
A) Al B) Mg C) Na D) K
A) distance of the outermost electron(s) from the nucleus B) ability to attract shared electron(s) 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) Ionic compounds in solution would conduct electricity D) Covalent compounds would readily ionize in solution
A) durability B) high melting point C) octahedral shape D) hardness
A) It occurs reversibly B) A catalyst is required C) Activation energy is high D) Heat energy is absorbed
A) 10.00 B) 0.01 C) 1000.00 D) 100.00
A) form carbon(IV) oxide on combustion B) have octahedral shape C) conduct electricity D) have same density
A) a base B) an acid C) an oxidizing agent D) a reducing agent
A) dehydration B) ozonolysis C) decomposition D) hydrolysis
A) 0.049g B) 0.0245g C) 0.490g D) 0.245g
A) decreasing the external pressure B) reducing its quantity C) increasing the external pressure D) distilling it 
A) 40°C B) 30°C C) 0°C D) 20°C
A) dissolves and crystals are formed B) dissolves and the solution becomes unsaturated C) dissolves and the solution becomes super saturated D) precipitates and the solution remains unchanged
A) propane B) propanol C) propanoic acid D) propyne
A) nature of the electrode B) electrolytic reactions C) electrolytic reactions D) mechanism of electrolysis
A) 2px B) 3s orbital C) 2s orbital D) 1s orbital
A) fire blanket B) water C) sand D) carbon(IV) oxide
A) Evolution of carbon dioxide gas when added to a trioxocarbonate (IV) salt B) Formation of salt and water with alkalis C) Evolution of ammonia when heated with ammonium salts D) Formation of salt and hydrogen gas with reactive metals
A) 2.4 × 1023 B) 1.2 × 1022 C) 1.2 × 1023 D) 2.4 × 1022
A) CH4 B) CH2 C) CH3 D) CH
A) salts B) acids C) alkalis 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) Na2SO4 B) PbSO4 C) FeSO4 D) CuSO4
A) production of ammonia B) photosynthesis C) combustion D) manufacture of cement
A) 150cm3 B) 75cm3 C) 30cm3 D) 25cm3
A) mass B) boiling point C) colour D) heat capacity
A) = 7 B) > 7 C) 0 D) < 7
A) dissociated B) decomposed C) reduced D) oxidised
A) +3 to 0 B) +2 to +3 C) 0 to +2 D) +3 to +2
A) the electrode dissolves B) ions are reduced C) oxidation is involved D) electrons are consumed
A) +2 to -2 B) +2 to +4 C) +4 to +2 D) +2 to 0
A) They have the same molecular formula B) physical properties of members are similar C) Successive members undergo changes in molecular formula by CH2 D) The chemical property change gradually throughout the series
A) 0.67g B) 0.45g C) 0.64g D) 6.40g
A) molecular formula of the compound B) molecular mass of the compound C) number of carbon atoms present in 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) remains constant as nuclear charge increases B) decreases as nuclear charge increases C) decreases as nuclear charge decreases D) increases as nuclear charge increases
A) 1:1 B) 2:1 C) 2:3 D) 1:2
A) are composed of neutrons and electrons B) cannot be attracted by electromagnetic field C) do not conduct electricity D) contain equal number of protons and electrons
A) Carbon(IV) oxide and Nitrogen B) Nitrogen(II) oxide and Carbon(IV) oxide C) Carbon(II) oxide and oxygen D) Carbon(II) oxide and Sulphur(IV) oxide
A) mannose B) maltose C) sucrose D) galactose
A) 1- chloropropanol B) 1-chloroethanol C) 2-chloroethanol D) 2-chloropropanol
A) corrosive effect of the chemicals on humans and animals B) acidic effect of chemicals on humans 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) can be recycled after use B) is cheap C) cannot be regenerated once used up D) is formed naturally
A) vibrational and translational motion B) vibrational and random motion C) vibrational motion D) random and translational motion
A) 1.0gdm−3 B) 5.0gdm−3 C) 0.2gdm−3 D) 2.0gdm−3
A) free energy B) enthalpy change C) equilibrium position D) activation energy
A) Solubility in water B) Melting point C) Crystalline nature D) Relative density |
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