Vietnam: What are bóng đá hôm nay trực tiếp sample 1st mid-semester question papers of 11th-grade Chemistry under bóng đá hôm nay trực tiếp Knowledge Connection Curriculum? What does bóng đá hôm nay trực tiếp 11th-grade Chemistry curriculum cover?

What are bóng đá hôm nay trực tiếp sample 1st mid-semester question papers of 11th-grade Chemistry under bóng đá hôm nay trực tiếp Knowledge Connection Curriculum in Vietnam? What does bóng đá hôm nay trực tiếp 11th-grade Chemistry curriculum cover?

Below is bóng đá hôm nay trực tiếp sample 1st mid-semester question papers of 11th-grade Chemistry under bóng đá hôm nay trực tiếp Knowledge Connection Curriculum in Vietnam:

1st mid-semester question papers - Knowledge Connection

Subject: 11th-grade Chemistry

Part I: Multiple Choice

Question 1.Which of bóng đá hôm nay trực tiếp following statements is correct?

A. In a one-way reaction, product substances can react with each other to form reactants.

B. In a reversible reaction, product substances cannot react with each other to form reactants.

C. A one-way reaction is a reaction that always occurs incompletely.

D. A reversible reaction is a reaction that occurs in two opposite directions under bóng đá hôm nay trực tiếp same conditions.

Question 2.When at equilibrium, which of bóng đá hôm nay trực tiếp following statements is correct?

A. bóng đá hôm nay trực tiếp rate of bóng đá hôm nay trực tiếp forward reaction is less than bóng đá hôm nay trực tiếp rate of bóng đá hôm nay trực tiếp reverse reaction.

C. bóng đá hôm nay trực tiếp concentration of products is always greater than that of reactants.

D. bóng đá hôm nay trực tiếp concentration of bóng đá hôm nay trực tiếp substances does not change.

Question 3.Dissociation is

A. bóng đá hôm nay trực tiếp process of breaking down substances into new substances when dissolved in water.

B. bóng đá hôm nay trực tiếp process of combining ions into molecules in a solution.

C. CuCl2.

D. NaOH.

Question 5.bóng đá hôm nay trực tiếp pH value of a solution is calculated by which of bóng đá hôm nay trực tiếp following expressions?

A. pH = −log[H+].

B. pH = 14 + log[H+].

C. pH = 14 −log[OH-].

D. pH = log[OH−].

Question 6.bóng đá hôm nay trực tiếp gastric juices in a normal human have a pH range of 1.5 – 3.5. bóng đá hôm nay trực tiếp environment of gastric juices is

A. a basic environment.

B. an acidic environment.

C. a neutral environment.

D. a neutralized environment.

Question 7.According to bóng đá hôm nay trực tiếp Bronsted – Lowry acid-base theory, a base is

A. an electron acceptor.

B. an electron donor.

C. a proton acceptor.

D. a proton donor.

Question 8.In nature, in which of bóng đá hôm nay trực tiếp following forms does bóng đá hôm nay trực tiếp element nitrogen (N) exist?

A. Exists in both elemental and compound forms.

B. Exists only in elemental form.

C. Exists only in organic compound form.

D. Exists only in inorganic compound form.

Question 9.bóng đá hôm nay trực tiếp structural characteristic of an N2 molecule is

A. has one triple bond.

B. has one double bond.

C. has two double bonds.

D. has two triple bonds.

Question 10.bóng đá hôm nay trực tiếp geometric shape of an ammonia molecule is

A. equilateral triangle.

B. regular tetrahedron.

C. straight line.

D. triangular pyramid.

Question 11.When a few drops of phenolphthalein are added to an NH3 solution, bóng đá hôm nay trực tiếp solution turns

A. pink.

B. yellow.

C. red.

D. blue.

Question 12.Which of bóng đá hôm nay trực tiếp following salts is highly soluble in water?

A. CaCO3.

B. BaSO4.

C. NH4Cl.

D. AgCl.

Question 13.When NaOH solution is added to NH4Cl solution and heated, bóng đá hôm nay trực tiếp gas that is released is

A. a light green gas.

B. a colorless gas with a pungent odor that turns moist litmus paper blue.

C. a brownish-red gas that turns moist litmus paper blue.

D. a colorless, odorless gas.

Question 14.Which group of metals does not react with HNO3?

A. Al, Cu.

B. Au, Pt.

C. Mg, Au.

D. Ag, Pt.

Question 15.Pure HNO3 is a colorless liquid, but HNO3 solution that is left for a long time usually turns yellow due to

A. HNO3 being highly soluble in water.

B. HNO3 solution being a strong acid.

C. HNO3 solution having strong oxidizing properties.

D. Pure HNO3 being unstable, partially decomposing to release NO2.

Question 16.Which of bóng đá hôm nay trực tiếp following is not a structural characteristic of bóng đá hôm nay trực tiếp nitric acid molecule?

A. bóng đá hôm nay trực tiếp nitrogen atom has an oxidation state of +5, which is bóng đá hôm nay trực tiếp highest oxidation state of nitrogen.

B. bóng đá hôm nay trực tiếp O – H bond is highly polar towards bóng đá hôm nay trực tiếp oxygen atom.

C. bóng đá hôm nay trực tiếp N → O bond is an ionic bond.

D. bóng đá hôm nay trực tiếp N → O bond is a donor-acceptor bond.

Question 17.Which of bóng đá hôm nay trực tiếp following expressions is bóng đá hôm nay trực tiếp equilibrium constant expression (Kc) for bóng đá hôm nay trực tiếp reaction:

Question 18.Consider bóng đá hôm nay trực tiếp chemical equilibria:

When bóng đá hôm nay trực tiếp pressure is changed, bóng đá hôm nay trực tiếp number of chemical equilibria that are shifted is

A. 1.

B. 2.

C. 3.

D. 4.

Question 19.For bóng đá hôm nay trực tiếp following equilibrium (in a closed container):

bóng đá hôm nay trực tiếp sequence of factors: (1) Increase temperature; (2) Add some water vapor; (3) Add some H2; (4) Increase bóng đá hôm nay trực tiếp overall pressure of bóng đá hôm nay trực tiếp system; (5) Use a catalyst.

bóng đá hôm nay trực tiếp set of factors that change bóng đá hôm nay trực tiếp equilibrium of bóng đá hôm nay trực tiếp system includes:

A. (1), (4), (5).

B. (1), (2), (3).

C. (2), (3), (4).

D. (1), (2), (4).

Question 20.Which of bóng đá hôm nay trực tiếp following dissociation equations is incorrect?

A.HBr → H^+^ + Br^−^.

B.HCOOH ⇌⇌ HCOO^−^ + H^+^.

C.

D.

Part II: Essay

Question 1:In a CoCl2 (pink) salt solution, there is bóng đá hôm nay trực tiếp following chemical equilibrium:

Predict bóng đá hôm nay trực tiếp color change of bóng đá hôm nay trực tiếp test tube containing bóng đá hôm nay trực tiếp CoCl2 solution in bóng đá hôm nay trực tiếp following cases:

a) Slowly add concentrated HCl.

b) Immerse bóng đá hôm nay trực tiếp test tube in hot water.

Question 2:Determine if a solution of iron alum (NH4Fe(SO4)2.12H2O) is acidic or basic. Why can iron alum be used to remove suspended particles in water?

Question 3:A gas mixture X consists of N2 and H2 with a density relative to H2 of 3.6. When X is heated in a closed container with Fe catalyst, a gas mixture Y is obtained with bóng đá hôm nay trực tiếp number of moles reduced by 8% compared to bóng đá hôm nay trực tiếp initial amount. Determine bóng đá hôm nay trực tiếp efficiency of bóng đá hôm nay trực tiếp NH3 synthesis reaction.

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Note: bóng đá hôm nay trực tiếp abovesample 1st mid-semester question papers of 11th-grade Chemistry under bóng đá hôm nay trực tiếp Knowledge Connection Curriculum in Vietnam is for reference only.

Students should combine revision with bóng đá hôm nay trực tiếp 1st mid-semester question papers given by teachers to have bóng đá hôm nay trực tiếp best results.

What are bóng đá hôm nay trực tiếp sample 1st mid-semester question papers of 11th-grade Chemistry under bóng đá hôm nay trực tiếp Knowledge Connection Curriculum in Vietnam? What does bóng đá hôm nay trực tiếp 11th-grade Chemistry curriculum cover? (Picture from bóng đá hôm nay trực tiếp Internet)

What does bóng đá hôm nay trực tiếp 11th-grade Chemistry curriculum in Vietnam cover?

According to Subsection 1, Section V of bóng đá hôm nay trực tiếp general education program for Chemistry issued withCircular 32/2018/TT-BGDDT, bóng đá hôm nay trực tiếp 11th-grade Chemistry curriculum in Vietnam includes:

Basic Chemistry Knowledge

- Chemical Equilibrium

Inorganic Chemistry

- Nitrogen and Sulfur

Organic Chemistry

- General Introduction to Organic Chemistry

- Hydrocarbons

- Halogen Derivatives - Alcohols - Phenols

- Carbonyl Compounds (Aldehydes - Ketones) - Carboxylic Acids

What are bóng đá hôm nay trực tiếp objectives of bóng đá hôm nay trực tiếp general education program for 11th-grade Chemistry in Vietnam?

By Section III of bóng đá hôm nay trực tiếp general education program for Chemistry issued withCircular 32/2018/TT-BGDDT, bóng đá hôm nay trực tiếp objectives of bóng đá hôm nay trực tiếp generaleducation program forChemistry in Vietnam are defined as follows:

- bóng đá hôm nay trực tiếp Chemistry subject develops students' chemistry competence and contributes to forming and developing key qualities and general competencies, especially bóng đá hôm nay trực tiếp scientific worldview, through coordination with other subjects and educational activities; instilling a passion for learning and research; honesty; a respectful attitude towards natural laws, interaction with nature that aligns with sustainable development requirements; bóng đá hôm nay trực tiếp ability to choose a career that matches one's abilities, interests, and personal conditions.