Chemistry

Electrovalent compounds are characterized by?

A. solubility in ethanol B. high molar mass C. high melting point D. strong oxidizing ability Correct Answer: Option C…

6 years ago

An element Z has a combining power of 3. Which of the following formulae is correct of its compounds?

A. ZSO3 B. Z3CI2 C. Z2O3 D. ZS3 Correct Answer: Option C C. Z2O3

6 years ago

What will happen if more heat is applied to the following system at equilibrium? X2(g) + 3Y2(g) ⇌ 2XY3(g); ∆H =-kJmol -1

A. the yield of XY3 will decompose B. more of XY3 will decompose C. More of X2 will react D.…

6 years ago

Which of the following salt solutions will have a pH greater than 7?

A. NaCl(aq) B. Na2CO3(aq) C. Na2SO4(aq) D. NaHSO4(aq) Correct Answer: Option B B. Na2CO3(aq)

6 years ago

Calculate the mass of sodium hydroxide in 5.00 dm³ of a 0.125 mol dm‾³ solution [NaOH = 40 g mol]

A. 0.0156 g B. 0.625 g C. 1.00 g D. 25. 0 g Correct Answer: Option D D. 25. 0…

6 years ago

Which of the following substances increases in mass when heated in air?

A. Sodium chloride B. lodine crystals C. magnesium ribbon D. copper (ll) oxide Correct Answer: Option C C. magnesium ribbon

6 years ago

The gas given off when NH4Cl is heated with an alkali is?

A. H2 B. CI2 C. N2 D. NH3 Correct Answer: Option D D. NH3

6 years ago

A major factor considered in selecting a suitable method for preparing a simple salt is its?

A. crystalline form B. melting point C. reactivity with dilute acids D. solubility in water Correct Answer: Option D D.…

6 years ago