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115年 - 115 身心障礙學生升學大專校院甄試試題_大學組:化學#139445
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24.將鎂帶置入鹽酸時,會有氣泡產生。下列關於此反應的敘述,何者正確?
(A)鎂帶會漸漸消失
(B)此反應不涉及電子轉移
(C)此反應屬於酸鹼中和反應
(D)產生的氣體是氧氣
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詳解 (共 1 筆)
MoAI - 您的AI助手
B1 · 2026/10/17
#7599436
這題在考什麼 這題考的是金屬與酸的反應,...
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1. An element's most stable ion forms an ionic compound with chlorine having the formula \( \text{XCl}_2 \). If the mass number of the ion is 40 and it has 18 electrons, what is the element and how many neutrons does it have? (A)Ar, 22 neutrons (B)Ar, 24 neutrons (C)S, 24 neutrons (D)Ca, 20 neutrons (E)K, 19 neutrons
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2. A material is made from Al, Ga, and As. The mole fractions of these elements are 0.25, 0.26, and 0.49, respectively. This material would be (A)a metallic conductor because Al is present. (B)an insulator. (C)a \( p \)-type semiconductor. (D)an \( n \)-type semiconductor. (E)superconductor.
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3. How many protons, neutrons, and electrons does the atom \( ^{33}\text{S} \) have? (A)16 protons, 16 neutrons, 33 electrons (B)17 protons, 17 neutrons, 16 electrons (C)16 protons, 16 neutrons, 16 electrons (D)17 protons, 16 neutrons, 17 electrons (E)16 protons, 17 neutrons, 16 electrons
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4. A certain substance, X, has a triple-point temperature of \( 20^\circ\text{C} \) at a pressure of 2.0 atm. Which one of the following statements cannot possibly be true? (A)X can exist as a liquid above \( 20^\circ\text{C} \). (B)X can exist as a solid above \( 20^\circ\text{C} \). (C)Liquid X can exist as a stable phase at \( 25^\circ\text{C} \), 1 atm. (D)Both liquid and solid X have the same vapor pressure at \( 20^\circ\text{C} \). (E)All of these statements could be true.
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8. Which pair of ions would not be expected to form a precipitate when dilute solutions of each are mixed? (A)\( \text{Cu}^{2+}, \text{S}^{2-} \) (B)\( \text{Ag}^+, \text{Cl}^- \) (C)\( \text{Ca}^{2+}, \text{PO}_4^{3-} \) (D)\( \text{Mn}^{2+}, \text{OH}^- \) (E)\( \text{Mg}^{2+}, \text{SO}_4^{2-} \)
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9. The molar mass of a solid as determined by freezing-point depression is 10% higher than the true molar mass. Which of the following experimental errors could not account for this discrepancy? (A)Not all the solid was dissolved. (B)More than the recorded amount of solvent was pipetted into the solution. (C)The solid dissociated slightly into two particles when it dissolved. (D)Some solid was left on the weighing paper. (E)Before the solution was prepared, the container was rinsed with solvent and not dried.
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