Zadanie 28
Which equation is correct? A. Cu(s) + H2SO4(aq) → CuSO4(aq) + H2(g) B. Al(s) + H2SO4(aq) → AlSO4(aq) + H2(g) C. Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) D. Fe(s) + H2SO4(aq) → FeSO4(aq) + H2(l)
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Which equation is correct? A. Cu(s) + H2SO4(aq) → CuSO4(aq) + H2(g) B. Al(s) + H2SO4(aq) → AlSO4(aq) + H2(g) C. Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g) D. Fe(s) + H2SO4(aq) → FeSO4(aq) + H2(l)
How does the acidity of a solution change when its pH decreases from 5 to 2? A. Increases 3 times B. Increases 1000 times C. Decreases 3 times D. Decreases 1000 times
Which compound is formed when CH3CH2CH(CH3)C≡CH reacts with excess H2(g) over a nickel catalyst? A. 3-methylpentane B. 2-methylpentane C. 2,3-dimethylbutane D. hexane
Which equation shows the first species acting as an electrophile? A. Br− + CH3CH2+ → CH3CH2Br B. H2O + H+ → H3O+ C. CN− + CH3Br → CH3CN + Br− D. AlCl3 + Cl− → AlCl4−
What happens to hydrogen in the following reaction? Each option states whether hydrogen is oxidized or reduced and the change in its oxidation state. Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g) A. Oxidized, from +1 to 0 B. Oxidized, from 0 to +1 C. Reduced,…
Which compound is most susceptible to attack by an electrophile? A. Butane, CH3CH2CH2CH3 B. 1-Chlorobutane, CH3CH2CH2CH2Cl C. But-2-ene, CH3CH=CHCH3 D. Cyclohexane, C6H12
What is the product of the reaction between hex-3-ene and steam, H2O(g)? A. Hexan-3-ol B. Hexan-1-ol C. Hexanal D. Hexan-3-one
A voltaic cell is represented by the cell diagram below. Which species is produced at the cathode? Ni(s) ∣ Ni2+(aq) ∣∣ Ag+(aq) ∣ Ag(s) A. Ni(s) B. Ni2+(aq) C. Ag+(aq) D. Ag(s)
Which of these reactions are nucleophilic substitutions? I. OH− + CH3CH2CH2Cl → CH3CH=CH2 + H2O + Cl− II. I− + CH3CH2Br → CH3CH2I + Br− III. CH3O− + CH3CH2Cl → CH3CH2OCH3 + Cl− A. I and II only B. I and III only C. II and III only D. I,…
A beam containing protons, neutrons and electrons is passed between two charged metal plates. The three paths observed are labelled P, Q and R. Which row correctly identifies the particle following each path? A. P: electron, Q: proton, R: neutron B. P: proton,…