CHEMICAL REACTIONS & EQUATIONS

CHEMICAL REACTIONS & EQUATIONS

Assessment

Flashcard

Chemistry

10th Grade

Practice Problem

Hard

Created by

Wayground Content

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20 questions

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1.

FLASHCARD QUESTION

Front

H2SO4 + 2NaOH → ________. How many hydrogen (H) atoms must be present in the products?

Back

4

2.

FLASHCARD QUESTION

Front

A teacher writes the equation representing the chemical reaction between hydrochloric acid and sodium on the board.HCl + Na → NaCl + H2The teacher states that the equation has not been balanced. Which of these correctly shows the products of this reaction after the equation has been balanced? Options: Na2Cl + H2,  2NaCl + H2, NaCl + 2H2,  2NaCl + 2H2

Back

2NaCl + H2

3.

FLASHCARD QUESTION

Front

The following reaction is an example of: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g) (i) displacement reaction (ii) combination reaction (iii) redox reaction (iv) neutralisation reaction

Back

displacement reaction and redox reaction

4.

FLASHCARD QUESTION

Front

Which statements about the reaction 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g) are correct? (i) Iron metal is getting oxidised (ii) Water is getting reduced (iii) Water is acting as reducing agent (iv) Water is acting as oxidising agent

Back

(i), (ii) and (iv)

5.

FLASHCARD QUESTION

Front

Which among the following is(are) double displacement reaction(s)? (i) Pb + CuCl2 → PbCl2 + Cu (ii) Na2SO4 + BaCl2 → BaSO4 + 2NaCl (iii) C + O2 → CO2 (iv) CH4 + 2O2 → CO2 + 2H2O

Back

(ii) Na2SO4 + BaCl2 → BaSO4 + 2NaCl

6.

FLASHCARD QUESTION

Front

Mole ratio of hydrogen and oxygen gases liberated during electrolysis of water

Back

2:1

7.

FLASHCARD QUESTION

Front

Which of the following are combination reactions? (i) 2KClO3⎯Heat⎯→ 2KCl + 3O2 (ii) MgO + H2O ⎯→ Mg(OH)2 (iii) 4Al + 3O2 ⎯→ 2Al2 O3 (iv) Zn + FeSO4 → ZnSO4 + Fe

Back

(ii) MgO + H2O ⎯→ Mg(OH)2 and (iii) 4Al + 3O2 ⎯→ 2Al2 O3

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