HSC, Admission ও BCS এর সেরা প্রস্তুতি

প্রশ্ন ৮·সময় ২ ঘণ্টা ৩৫ মিনিট

1. Observe the stem and answer associated questions:

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2. Look at the stem and answer related questions:

$\mathrm{K}_{\mathrm{ap}}\left(\mathrm{X} \mathrm{Z}_{2}\right)=8.32 \times 10^{-12}$

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3. $1.5 \% \mathrm{H}_{3} \mathrm{PO}_{3}, \mathrm{HNO}_{3}, \mathrm{HClO}_{4}, \mathrm{H}_{3} \mathrm{PO}_{4}$ .

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4. Look at the stem and answer the related questions:

$[X, Y, Z, P, Q$ and $R$ are not the regular symbol of elements]

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5. Answer the associated questions below on the basis of stem :

$\mathrm{K}_{\mathrm{a}}=1.8 \times 10^{-5}$

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Chemistry 1st Paper CQ-Sylhet Board-2021