Advanced level 2026 catholic mock Chemistry 1

This document appears to be a Chemistry examination paper featuring multiple-choice questions. Below is the extracted data, organized by question number.

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Chemistry Questions (1–9)

1. Which of the following accounts for the diagonal relationship between Beryllium and Aluminium?

• A: Their carbonates are stable to heat.

• B: Both elements are metals.

• C: They both have similar atomic radii.

• D: Their nitrates are stable to heat.

2. The hybridisation of the carbon atoms C-1 and C-2 in prop-1-yne ($CH \equiv C-CH_3$) is:

• A: $sp, sp^2$

• B: $sp, sp^3$

• C: $sp^2, sp^2$

• D: $sp^3, sp^3$

3. What mass of aluminium hydroxide, $Al(OH)_3$, contains 0.75 mol of hydroxide ions? (Relative atomic masses: $Al = 27, O = 16, H = 1$)?

• A: 19.5

• B: 26.0

• C: 39.0

• D: 52.0

4. The successive ionization energies of an element A in kJ/mol are: 900, 1800, 14800 and 21000. The compound formed between Element A and Oxygen is:

• A: $A_2O$

• B: $AO$

• C: $A_2O_3$

• D: $A_2O_2$

5. The carbon atom surrounded by four different functional groups is known as:

• A: Main carbon

• B: Asymmetric carbon

• C: Symmetric carbon

• D: Iso-carbon

6. Calculate the number of sodium ions ($Na^+$) present in an aqueous solution of sodium phosphate ($Na_3PO_4$), containing 1.64 g of the salt. (RMM: $Na_3PO_4 = 164, L = 6.02 \times 10^{23}$):

• A: $1.81 \times 10^{22}$

• B: $6.02 \times 10^{21}$

• C: $1.81 \times 10^{21}$

• D: $1.806 \times 10^{23}$

7. Give the reagent and reaction condition for the following conversion:

$CH_3CHCH_2 \longrightarrow CH_3CHBrCH_3$

• A: $Br_2$ / UV light

• B: $HBr$ / room temperature

• C: $Br_2 / CCl_4$, dark

• D: $HBr / KOH$, heat

8. What type of isomerism is exhibited by the compound 2-hydroxypropanoic acid?

• A: Position isomerism

• B: Geometrical isomerism

• C: Optical isomerism

• D: Chain isomerism

9. The half-life of a radioactive substance X is 14 days. How many days will it take for… (Note: The text for question 9 is cut off at the bottom of the page.)

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