Tag: substances in common use

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Questions Related to substances in common use

Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

$NaHCO _3$ represent the formula of which one of the following? 

  1. Sodium carbonate

  2. Baking soda

  3. Sodium acetate

  4. Washing soda
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

${ NaHCO } _{ 3 }$ is sodium bicarbonate or known as sodium hydrogen carbonate. Sodium bicarbonate is a white solid that appears as fine powder. It has a slightly salty, alkaline taste resembling that of sodium carbonate(washing soda). It is also known as baking soda or cooking soda. 

Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

The balanced equations for : "Carbon dioxide is passed through a concentrated aqueous solution of sodium chloride saturated with ammonia".

  1. $NaCl + NH _4OH + CO _2\rightarrow NH _4Cl +NaHCO _3$
  2. $2NaCl + NH _4OH + CO _2\rightarrow NH _4Cl +2NaHCO _3$
  3. $NaCl + NH _4OH + CO _2\rightarrow NH _4CO +NaHCl _3$
  4. $NaCl + NH _4OH + CO _2\rightarrow NH _3 +NaCl+H _2CO _3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$NaCl + NH _4OH + CO _2\rightarrow NH _4Cl +NaHCO _3$ 

Sodium bicarbonate is formed. This reaction is used in the Solvay process for the manufacture of sodium carbonate.

Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

Baking powder contains baking soda and : 

  1. potassium hydrogen tartarate

  2. calcium bicarbonate

  3. sodium carbonate

  4. vinegar
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Baking powder is dry chemical leavening agent a mixture of carbonate or bicarbonate and a weak acid. A typical acid in such formulations is cream of tartar derivative of tartaric acid. Commercially it is sodium bicarbonate.

Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

Sodium sesquicarbonate is 

  1. $\displaystyle Na _{2}CO _{3}NaHCO _{3}$

  2. a double salt

  3. trisodium hydrogen discrabonate

  4. water softner
Reveal answer Fill a bubble to check yourself
A,B,C,D Correct answer
Explanation
Sodium sesquicarbonate (Systematic name trisodium hydrogendicarbonate) $Na _3H(CO _3) _2$ is a double salt of sodium bicarbonate and sodium carbonate($\displaystyle Na _{2}CO _{3}NaHCO _{3}$), and has a needle-like crystal structure. However, the term is also applied to an equimolar mixture of those two salts, with whatever water of hydration the sodium carbonate includes, supplied as a powder.
odium sesquicarbonate is used in bath salts, swimming pools, as an alkalinity source for water treatment.
Hence options A,B,C & D are correct.
Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

The element which is not common between the compounds called baking soda and soda ash is:

  1. nitrogen

  2. hydrogen

  3. oxygen

  4. sulphur
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Baking soda formula is $NaHCO _3$.

Soda ash formula is $Na _2CO _3$.
So, hydrogen atom $(H)$ is not common between the compounds of baking soda and soda ash.
So, the answer is $B$.

Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

Baking soda is a/an:

  1. acidic substance

  2. basic substance

  3. neutral substance

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Baking soda is sodium bicarbonate or sodium hydrogen carbonate. It has slightly salty, alkaline taste resembling that of washing soda. Its alkalinity in aqueous solution is because of formation of carbonic acid and hydroxide ion.
${ HCO } _{ 3 }^{ - }+{ H } _{ 2 }O\rightarrow { H } _{ 2 }{ CO } _{ 3 }+{ OH }^{ - }$

Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is:

  1. acetic acid

  2. oxalic acid

  3. carbonic acid

  4. tartaric acid
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tartaric acid used in baking powder where it serves as the source of acid that reacts with baking soda. This reaction produces carbon dioxide gas and lets products rise using active yeast cultures as a source of carbon dioxide gas.

Multiple choice chemistry substances in common use preparation, properties and uses of baking soda chemical from common salt compounds of carbon

Baking powder contains Sodium Hydrogen Carbonate, and__________.

  1. tartaric acid

  2. sodium carbonate

  3. calcium chloride

  4. acetic acid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Baking powder contains Sodium Hydrogen Carbonate $NaHCO _3$, and tartaric acid. It is used for increasing the volume and lightening the texture of baked goods. It releases carbon dioxide gas into a batter or dough through an acid-base reaction, causes bubbles in the wet mixture which expands and thereby  leavening the mixture.