AS & A Level Chemistry (9701) — May–June 2023, Paper 21
5 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Tellurium is an element in Group 16. The most common isotope of tellurium is 130-Te. Its electronic configuration is [Kr] 4d10 5s2 5p4. Complete Table 1.1 for 130-Te by giving its…
Answer this question and get it marked →A neutralisation reaction occurs when NaOH(aq) is added to H2SO4(aq). equation 1: 2NaOH(aq) + H2SO4(aq) - Na2SO4(aq) + 2H2O(l) Define enthalpy change of neutralisation, delta H…
Answer this question and get it marked →Chlorine is a very reactive element. Chlorine reacts with silicon to form silicon(IV) chloride. Describe the appearance of silicon(IV) chloride at room temperature and pressure.…
Answer this question and get it marked →V is a colourless liquid. Fig. 4.1 shows the structure of V: it is but-3-enoic acid, CH2=CHCH2CO2H (a carboxylic acid with a terminal C=C double bond). V reacts with an excess of…
Answer this question and get it marked →Molecule M is present in petrol, a fuel used in cars. M is a saturated, non-cyclic hydrocarbon. M contains eight carbon atoms. Construct an equation for the complete combustion of…
Answer this question and get it marked →