Specify sulfate - ion

Specify the chloride-ion

Specify metal with valence 3

The charge of the proton is equal to

А) +1

А) Al

А) Cl^-

А) SO^2-₄

295. To define coordination numbers of forming complexes in compounds: K ,

A) 2, 6, 6

296. To define a charge of forming complex in compound

A) +2, +3

297. What is the type of reaction H₂SO₄+ 2NaOH =Na₂SO₄+ 2Н₂O:

I) neutralization; 2) replacement; 3) decomposition; 4) addition; 5) oxidation-reduction?

A) 1

298. What reactions belong to the oxidation-reduction?

2. ;

3. ;

4. Fe+S=FeS

A) 2, 4

299. What is the type of reaction: ?

A) Disproportion

300. Oxidizer:

Accepts electrons;

301. Reducer:

A) Gives electrons;

302. Oxidizer for the given reaction:

A) ,

303. Reducer for the given reaction: 4NH₃+3O₂=2N₂+6H₂O

A. N^-3

304. To specify the sum of coefficients for reaction:

A) 10

305. To specify the sum of coefficients for reaction:

А)20

306. To specify the sum of coefficients for reaction: K₂S +K₂Cr₂ +H₂SО₄ S + K₂S0₄ + Cr₂ (SО₄ +

А) 26

307. To specify the sum of coefficients for reaction: +

A.7

308. To specify the sum of coefficients for reaction:

A) 13

309. To specify the sum of coefficients for reaction:

A) 19

310. To specify the sum of coefficients for reaction:

A) 7

311. To specify the sum of coefficients for reaction:

A) 22

312. To specify the sum of coefficients for reaction: →

A) 10

313. To specify the sum of coefficients for reaction: + + →Cr + + O

A) 14

314. pH of solution calculates according to the formula:

A) pH = 14 - pOH

315. The hydroxyl indicator of environment is equal:

^A) pH = [H⁺][OH^-]

316. To specify an alkaline solution:

A) [H⁺] = 10^-12

317. To specify a neutral solution:

A) H⁺] = [OH^-]

318. Electrolysis is:

A) oxidation-reduction process;

319. Cathode is an electrode at which there is a process:

A) Reduction of cations;

320. Anode is an electrode at which there is a process:

A) Oxidation of anions;

321. E lectrolyte of the lead accumulator is the solution of:

A) H₂SO₄

322. Inhibitor is:

diminish of corrosion

323. Faraday number is equal:

A) 96500

324. Potential of a standard hydrogen electrode is equal:

A) 0

325. To inert anodes belong:

A) graphite, platinum

326. To active anodes belong:

A) copper

327. At electrolysis of NaCl solution at the anode it is allocated:

A) chlorine

Дата добавления: 2017-01-13