#1
What is the formula for sodium chloride?
NaCl
ExplanationSodium chloride is formed by the combination of sodium (Na) and chlorine (Cl) ions in a 1:1 ratio.
#2
Which of the following salts is formed from the reaction between sulfuric acid and potassium hydroxide?
Potassium sulfate
ExplanationThe reaction between sulfuric acid (H2SO4) and potassium hydroxide (KOH) produces potassium sulfate (K2SO4) and water.
#3
Which acid reacts with calcium carbonate to form calcium chloride?
Hydrochloric acid
ExplanationThe reaction between hydrochloric acid (HCl) and calcium carbonate (CaCO3) produces calcium chloride (CaCl2), carbon dioxide (CO2), and water.
#4
What is the name of the salt produced by the reaction between hydrochloric acid and sodium carbonate?
Sodium chloride
ExplanationThe reaction between hydrochloric acid (HCl) and sodium carbonate (Na2CO3) produces sodium chloride (NaCl), carbon dioxide (CO2), and water.
#5
Which of the following salts is formed when hydrochloric acid reacts with barium hydroxide?
Barium chloride
ExplanationThe reaction between hydrochloric acid (HCl) and barium hydroxide (Ba(OH)2) produces barium chloride (BaCl2) and water.
#6
Which acid reacts with sodium hydroxide to form sodium sulfate?
Sulfuric acid
ExplanationSulfuric acid (H2SO4) reacts with sodium hydroxide (NaOH) to produce sodium sulfate (Na2SO4) and water.
#7
What is the name of the salt produced by the reaction between hydrochloric acid and ammonia?
Ammonium chloride
ExplanationThe reaction between hydrochloric acid (HCl) and ammonia (NH3) results in the formation of ammonium chloride (NH4Cl).
#8
What is the chemical formula for magnesium nitrate?
Mg(NO3)2
ExplanationMagnesium nitrate has the chemical formula Mg(NO3)2, indicating the presence of magnesium ions (Mg2+) and nitrate ions (NO3-) in a 1:2 ratio.
#9
In the salt Na2SO4, what is the valency of sulfur?
4
ExplanationIn the salt Na2SO4 (sodium sulfate), sulfur has a valency of 4, as it forms four bonds with oxygen.
#10
What is the chemical formula for iron(III) sulfate?
Fe2(SO4)3
ExplanationIron(III) sulfate has the chemical formula Fe2(SO4)3, indicating the presence of iron ions (Fe3+) and sulfate ions (SO4^2-) in a 2:3 ratio.
#11
Which of the following salts is insoluble in water?
Silver chloride
ExplanationSilver chloride (AgCl) is insoluble in water, forming a white precipitate when these ions combine.
#12
What is the common name for the salt Na2CO3?
Sodium carbonate
ExplanationSodium carbonate (Na2CO3) is commonly known as washing soda or soda ash.
#13
Which gas is evolved when hydrochloric acid reacts with sodium sulfide?
Hydrogen gas
ExplanationThe reaction between hydrochloric acid (HCl) and sodium sulfide (Na2S) produces hydrogen gas (H2) along with sodium chloride.
#14
What is the common name for the salt KNO3?
Potassium nitrate
ExplanationPotassium nitrate (KNO3) is commonly known as saltpeter or nitre.
#15
What is the common name for the salt CaCO3?
Calcium carbonate
ExplanationCalcium carbonate (CaCO3) is commonly known as limestone or chalk.