Užduočių lapas tema Chemija slaugos stojamiesiems egzaminams su atsakymais

Nemokamas spausdinamas užduočių lapas tema Chemija slaugos stojamiesiems egzaminams: 8 uždavinių nuo lengvų iki egzamino lygio, su atsakymais. Atsispausdinkite arba išsaugokite kaip PDF.

Naujas užduočių lapasPraktikuokitės internete su užuominomis

Mokytojams: galima nemokamai spausdinti, kopijuoti ir naudoti per pamokas. Kiekvienas naujas lapas turi naujas reikšmes ir savo atsakymų raktą. Būsime dėkingi už nuorodą į ExamProblems jūsų kurso puslapyje.

Vardas: ____________________   Data: ____________

1.Lengvas

Elements in the same period of the periodic table have the same number of what?

  1. AOccupied electron shells
  2. BProtons
  3. CNeutrons
  4. DValence electrons
2.Lengvas

Between which kinds of elements do covalent bonds usually form?

  1. ATwo nonmetals
  2. BA metal and a nonmetal
  3. CTwo group 1 metals
  4. DA metal and a noble gas
3.Lengvas

What does the law of conservation of mass state?

  1. AGases have no mass
  2. BMass is neither created nor destroyed in a chemical reaction
  3. CThe mass of products is always greater than the mass of reactants
  4. DMass is lost as heat in every reaction
4.Vidutinis

An exothermic reaction is at equilibrium. What happens if the temperature is raised?

  1. AThe equilibrium shifts toward the products, raising the yield
  2. BThe reaction becomes endothermic
  3. CThe equilibrium shifts toward the reactants
  4. DThe equilibrium does not change
5.Vidutinis

A radioactive isotope has a half-life of 5 days. A sample starts with 80 g. How much is left after 10 days?

  1. A20 g
  2. B40 g
  3. C10 g
  4. D0 g
6.Vidutinis

Which type of bond holds the two atoms together in a nitrogen molecule, N₂?

  1. AA double covalent bond
  2. BA triple covalent bond
  3. CA single covalent bond
  4. DAn ionic bond
7.Sunkus

Uranium-238 (atomic number 92) undergoes alpha decay. Which nucleus is formed?

  1. AProtactinium-234 (atomic number 91)
  2. BPlutonium-242 (atomic number 94)
  3. CThorium-238 (atomic number 90)
  4. DThorium-234 (atomic number 90)
8.Sunkus

10 g medžiagos ištirpinama vandenyje, gaunant 250 mL tirpalo. Kokia jos koncentracija g/L?

  1. A25 g/L
  2. B2,5 g/L
  3. C0,04 g/L
  4. D40 g/L

Atsakymai

  1. 1. A · Occupied electron shells
  2. 2. A · Two nonmetals
  3. 3. B · Mass is neither created nor destroyed in a chemical reaction
  4. 4. C · The equilibrium shifts toward the reactants
  5. 5. A · 20 g
  6. 6. B · A triple covalent bond
  7. 7. D · Thorium-234 (atomic number 90)
  8. 8. D · 40 g/L

Išsamūs sprendimai žingsnis po žingsnio: praktikuokite šią temą svetainėje examproblems.com.