225. In the reaction: $\mathrm{NO(g) + Br_2(g) \rightarrow 2NOBr(g)}$, if the rate of formation of $\mathrm{NO(g)}$ is $1.6\times10^{-4}\,\mathrm{mol.s^{-1}}$, the rate of reaction and the rate of production of $\mathrm{Br_2(g)}$ in $\mathrm{mol.s^{-1}}$, from right to left, are which of the following?
(1) $1.6\times10^{-4}$, $8\times10^{-5}$ (2) $8\times10^{-5}$, $8\times10^{-5}$
(3) $1.6\times10^{-4}$, $1.6\times10^{-4}$ (4) $8\times10^{-5}$, $1.6\times10^{-4}$

226. From the reaction: $\mathrm{C_2H_4(g) + H_2O(g) \rightleftharpoons C_2H_5OH(g)}$, $K=2$, used in industry for the preparation of ethanol. If two moles of ethylene and two moles of water, at a certain temperature, in a two-liter closed container reach equilibrium, the percent yield of this process is which of the following?
(1) $60$ (2) $\Delta 0$ (3) $81$ (4) $85$

227. Which description of the Haber process is incorrect?
(1) $\mathrm{V_2O_5}$ is used as a suitable catalyst.
(2) Despite the exothermic nature of the reaction, it is possible to carry it out at high pressure and temperature.
(3) One of the main features of the process is removing the product from the reaction system by liquefying it.
(4) It is an industrial method for the synthesis of ammonia from the direct reaction of nitrogen and hydrogen gases.
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228 -- In a hydrochloric acid solution, if the molar concentration of hydronium ions is $4\times10^{-8}$ times the molar concentration of hydroxide ions, the pH of this solution is:
(1) $2/3$ (2) $2/7$ (3) $3/3$ (4) $3/7$

229 -- How many milliliters of potassium hydroxide solution with $\text{pH} = 13$ are needed for the complete reaction with 25 milliliters of $4\,\text{mol.L}^{-1}$ sulfuric acid solution?
(1) $50$ (2) $100$ (3) $200$ (4) $250$

230 -- Which statement is correct?

1. The general formula of amino acids is $\text{R}-\text{C}_\gamma\text{H}_\gamma\text{NO}_\gamma$.
2. In the reaction of methylamine with water, the $\text{H}_2\text{O}$ molecule plays the role of a Brønsted acid.
3. Sodium acetate is an acidic salt and turns litmus red.
4. In the hydrolysis of fats, soap and glycerol are formed in a 1:1 molar ratio.

231 -- Which statement is correct?

1. Diethylammonium ion, the conjugate acid of diethylamine, is $(\text{CH}_\gamma-\text{CH}_\gamma)_\gamma\text{N}^-$.
2. The pH of a $0.5\%$ molar hydrochloric acid solution is $1.7$.
3. If the concentration of a strong acid solution is doubled, the pH decreases by one unit.
4. In a buffer solution, the pH equals $\text{p}K_a$ of the acid when the molarities of acid and salt are equal.

232 -- In the conversion of which two substances to each other, the reaction is of the oxidation type and the greater number of electrons are displaced?
(1) Chromate ion to chromium(III) oxide (2) Sodium oxide to sodium hydroxide
(3) Hydrogen peroxide to water (4) Sulfur trioxide to sulfuric acid

233 -- Which statement is not correct?

1. The electrons obtained from the complete oxidation of one mole of methanol can completely reduce two moles of $\text{CuCl}_2$.
2. 1-butanol and 2-butanol can be converted by oxidation to a compound with the formula $\text{C}_4\text{H}_8\text{O}$.
3. Propanone (acetone) is an example of compounds obtained from the oxidation of 1-propanol.
4. In the complete combustion of methane, the change in oxidation number of carbon is 8 units.

234 -- Considering the given standard half-reaction potentials $E^\circ$, which statement is correct?
$$E^\circ[\text{Ni}^{2+}(\text{aq})/\text{Ni}(\text{s})] = -0.25\,\text{V}$$ $$E^\circ[\text{Zn}^{2+}(\text{aq})/\text{Zn}(\text{s})] = -0.76\,\text{V}$$ $$E^\circ[\text{Fe}^{2+}(\text{aq})/\text{Fe}(\text{s})] = -0.44\,\text{V}$$

1. Under standard conditions, iron reacts with zinc salt solutions.
2. The reducing power of these three metals is $\text{Ni} > \text{Fe} > \text{Zn}$.
3. The oxidizing power of the three cations is $\text{Zn}^{2+}(\text{aq}) > \text{Fe}^{2+}(\text{aq}) > \text{Ni}^{2+}(\text{aq})$.
4. The difference in $E^\circ$ of the iron--nickel electrochemical cell is $0.32$ volts.

235 -- Which statement is correct?

1. In electroplating, the object to be plated must be placed at the anode.
2. In the electrochemical refining of copper, sulfuric acid plays the role of oxidizing agent.
3. Aluminum is the most abundant metal and the third most abundant element in the Earth's crust.
4. A Down cell is used to prepare sodium from molten sodium chloride.

10-- In which verse is the simile most vivid?

1. [(1)] A hundred thorns of sorrow from the heart, like a longing desire
2. [(2)] Like a stream of fire, the dust of existence, let it be the wind
3. [(3)] The fish is the stature of you, free from the vanity of the head
4. [(4)] My heart, like a bird, fell into the trap from grief of you

11-- The verses ``metaphor, metonymy, simile, analysis, good style'' are found in which order of verses?

(Alef) Give me the opportunity to turn the lowly into servants of the government
that from tears of sorrow there is no patience for me, like the palm of Khatam
(B) My head on the dry brains of Zahid --- like a stream
(C) The space of fasting women --- the avenger for the sake of the people
(D) Whatever went from hand to hand, bringing it back is difficult and problematic
(H) Negligence brings from the ashes of the dust --- a sign

1. [(1)] j, b, d, Alef, h
2. [(2)] j, Alef, d, h, b
3. [(3)] d, Alef, h, j, b
4. [(4)] d, h, Alef, j, b

12-- In all the verses, the place of \ldots\ is substituted with an added word and its complement.

1. [(1)] The king managed justice and the judge composed
2. [(2)] Negligence made our youth heavy as water sound
3. [(3)] The soul of the heedless is on the journey --- the wall of the body is the home of trust
4. [(4)] The child of the nature from the heart of the sea --- watching and going

13-- In which verse is a ``natural role'' not found?

1. [(1)] You yourself, what a lesson, the horseman of Shirin's work
2. [(2)] Today the flock --- like the individuals, around the row
3. [(3)] Listen, my friend, other than you, help me, I am
4. [(4)] Go, prostrate yourself, do not turn the old pir of the magi

14-- Which verse lacks a ``middle interjection''?

1. [(1)] The officer --- the space of the inn, the head dust-covered
2. [(2)] Shirin showed to the lips the sugar of union
3. [(3)] The ill-fated who is with us, to whom is enmity
4. [(4)] And the mind of thinkers increases, calling the people, let it arrive

15-- The constituent parts of the first, second, third and fourth sentences, in order, which is correct?
``My father brought me to the wall of the notary office. The legal validity of the deed and our name and showing me a beautiful line drawn on it. There was no familiarity in the village and the neighborhood that did not see us and praised.''

1. [(1)] Three transitive objects, two intransitive objects, three transitive objects to the object
2. [(2)] Four transitive objects to the object and complement, three transitive objects, three transitive objects to the object
3. [(3)] Four transitive objects to the object and complement, two intransitive objects (intransitive), three transitive objects to the object
4. [(4)] Three transitive objects to the object, three transitive objects to the complement and complement

16-- Among the given words, how many words from one root are correct?
``Kish, Kusha, Pasin, Hale, Zamin, Parvane, Nushin, Bohran, Nalan, Khaste, Tamanna, Kin, Khande, Mana, Rahavard, Ava, Male, Faraind, Simin, Biganeh''

1. [(1)] Ten
2. [(2)] Eleven
3. [(3)] Twelve
4. [(4)] Thirteen

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17-- In which literary concept does the meaning of ``separation from good companionship'' appear?

• [A)] The ignorant will see the consequence The wise listen from the first, in order
• [B)] You who wander, go into the world The same demon was your fellow traveler
• [C)] Whoever stays with another becomes like them Their garment of self turns black
• [D)] Friendship does not show this treachery A loyal friend is a steadfast companion
• [H)] Do not seek the companionship of the wicked Do not lean on the oppressors
• [V)] If you and I part from goodness Less good companionship leads to ruin

(1) A, B, H, D (2) A, D, V, O (3) V, H, B, A (4) V, J, H, B

18-- Verse: ``The dove that never wanted to go toward the grain and the trap'' --- which verse does not share a similar meaning?

• [1)] A simple singer somewhere sings a song Like a horse-rider going with companions
• [2)] From that colorful Noah, I am in every meadow From the garden of roses, I am the rose-colored one
• [3)] The one who in winter alone wore a shroud and left Going to the cold, alone with a shroud, departed
• [4)] The people of the world like a traveler saw and went In the traveler's inn, a night's rest, saw and went

19-- Passage: ``It is a lesson that the people of that land cook me like a camel at dawn and four hundred camels, and carry me away.'' With which verse does it share the most appropriate meaning?

• [1)] More dear than all people is a good friend More dear is one who is the doer of the world
• [2)] More dear than that person who is your dear More dear is the one who makes you dear
• [3)] Ghorra, know that the world makes you dear Know that the world makes you dear
• [4)] Be as dear as a servant to the Sultan Like a star, a guide, a companion

20-- Which verse has a different meaning from the others?

• [1)] Every hair of yours ties life to connection With such attachment, cutting from self is difficult
• [2)] The indifferent ones drive the soul in every world Like a ball rolling on the ground, difficult
• [3)] Those who turn away from the world of their own sorrow Wandering without rest, given a dwelling
• [4)] The desert has no sign worthy of my taste The desert, my companion, has no flight from me

21-- Which verse has a different meaning from the others?

• [1)] Continuous nurturing like a candle, mother of time What need is there for those people to listen to speech
• [2)] O heart, do not covet the kindness of one Who is far away, hidden from the sky
• [3)] The house is not built on the order of caravans The road companion in this inn, the spiritual abode
• [4)] Who is pleasure-seeking in such a state, busy Who is pleasure-seeking, busy with pleasure

22-- Passage: ``For listening, the ears and hearts of all should be like ears; the soul pure, the heart clean and bright.'' With which verse does it have the most connection?

• [1)] The thirst of the sun makes the color and scent pure The restless one in the lap of the flower, no sleep
• [2)] Whoever is cleansed, the beauty of God becomes free from glory No madman lover is from stone
• [3)] The witness sees us, not every eye that sees The mirror should have a polish, on the face of zinc
• [4)] The veil of Mansur if torn like a flower Drown from the secrets of unity, easy is not

23-- Meaning of verse: ``The green leaf of the tree in the view of the wise'' --- with which verse is it most appropriate?

• [1)] The love of birds calls you to listen Spring came and the flowers bloomed
• [2)] Spring came and the nightingale and the flowers bloomed The side of the field like a red-cheeked drunk
• [3)] Call, the cupbearer, the full-bloomed rose arrived The beauty of the rose, the face of the rose arrived
• [4)] To the bud as if from its own veil cast The beauty of the rose, the face of the rose arrived

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