Tag: chemical from common salt

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

Which of the following is not a use of baking soda?

  1. In medicines as antacid

  2. As a component of baking powder

  3. In removing permanent hardness of water

  4. In fire extinguishers
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Baking soda,$(NaHCO _3)$ also known as sodium bicarbonate, is widely used in baking. This is because it has leavening properties, meaning it causes dough to rise by producing carbon dioxide. Aside from cooking, baking soda has a variety of additional household uses and health benefits.

They are-
  • In medicines as antacid
  • As a component of baking powder
  • In fire extinguishers
  • Relieves insect bites
  • Relieves skin irritation
  • Air Freshener
  • Hence, option C is wrong about baking soda as it is not used in removing permanent hardness of water.

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

In Solvay ammonia process, sodium bicarbonate is precipitated due to :

  1. presence of $NH _3$
  2. reaction with $CO _2$

  3. reaction with brine solution

  4. reaction with NaOH
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In Solvay process, sodium bicarbonate is precipitated due to common ion$(Na^+)$ effect provided by brine (concentrated NaCl Solution).

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

$Ca(H _{2}PO _{4}) _{2}$ in baking powder:

  1. Behaves as an acid in moist condition and decomposes $NaHCO _{3}$ to give $CO _{2}$
  2. Behave as a base in moist condition and gives $H _{3}PO _{4}$

  3. Behaves as binder

  4. Behaves as a filler
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The baking powder consists of sodium bicarbonate and calcium dihydrogen phosphate.In this process the ${ H } _{ 2 }{ PO } _{ 4 }$ acts as acid in the baking powder and then reacts with ${ NaHCO } _{ 3 }$  so that carbon dioxide that expands in the food items.When sufficient heat is given bond will breaks between  $Ca$ and ${ H } _{ 2 }{ PO } _{ 4 }$ and then reacts with 

$NaHC{ O } _{ 34 }$ and the carbon dioxide will be formed.

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

When sample of baking soda is strongly ignited in crucible it suffered loss in weight of  $3.1 g $  the mass of baking soda is- 

  1. $ 16.8 g $
  2. $ 8.4 g $
  3. $ 11.6 g $
  4. $4.2 g $
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The reaction is:
$2NaHCO _3 \rightarrow Na _2CO _3+H _2O+CO _2$

The loss in weight is due to water and carbon dioxide.

$2$ moles $(2\times 84 g)$ of sodium bicarbonate gives $ 1$  mole $( 18  g)$ of water and $ 1$ mole of carbon dioxide $( 44 g)$.

Thus, decomposition of $ 168   g$ of sodium bicarbonate will result in loss in weight of $18+44=62g$

The loss in weight of $3.1$ g corresponds to $\dfrac{168}{62}\times 3.1=8.4g$ of sodium bicarbonate. 

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

Which of the following is known as fusion mixture?

  1. mixture of $Na _{2}CO _{3}+NaHCO _{3}$
  2. $Na _{2}CO _{3}+10H _{2}O$
  3. mixture of $K _{2}CO _{3}+Na _{2}CO _{3}$
  4. $NaHCO _{3}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A fusion mixture consists of a sodium salt and a potassium salt. Generally, mixture of potassium carbonate and sodium carbonate is used. It is called a fusion mixture because it is fused with a sample of organic compound to test for various groups.

Hence option C having both sodium carbonate and potassium carbonate is the correct answer.

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

Read the given statements and select the correct option:


Statement 1 :Backing soda does not taste sour.
Statement 2 :Bases are sour in taste while acids are bitter in taste.

  1. Both statements 1 and 2 are true statement 2 is correct explanation of statement 1.

  2. Both statements 1 and 2 are true both statement 2 is not the correct explanation of statement 1.

  3. Statements 1 is true and statement 2 is false

  4. Both statements 1 and 2 are false.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Baking soda,which has chemical name sodium bicarbonate $(NaHCO _3)$ is slightly basic in nature.Which means it tastes bitter as acid taste sour and bases taste bitter.

Statement 01: $NaHCO _3$ does not taste sour  is correct.
Statement 02: Acid taste bitter and bases taste sour is wrong.

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

Baking powder contains :

  1. $NaHCO _{3}, Ca(H _{2}PO _{2}) _{2}$ and starch
  2. $NaHCO _{3}, Ca(H _{2}PO _{2}) _{2}$
  3. $NaHCO _{3}$, starch
  4. $NaHCO _{3}$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Baking powders contains sodium bicarbonate and one or more acid salts. Usually 30% sodium bicarbonate, 5-12% monocalcium phosphate, and 21-26% sodium aluminium sulfate and starch.

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

The baking soda formula is :

  1. $K _{2}CO _{3}$
  2. $NaHCO _{3}$

  3. both a and b

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

Its chemical formula is $NaHCO _3$(sodium bicarbonate). Its formula consists of one sodium (Na) atom, one hydrogen (H) atom, one carbon (C) atom and three oxygen (O) atoms. It is commonly known as baking soda, bread soda, bicarbonate of soda, and cooking soda.

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

$\text{Statement}:$ Baking soda or baking powder is different.


Answer whether the above statement is true or false.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
$\text {Baking soda}$ has only one ingredient: sodium bicarbonate. It's chemical formula is $NaHCO _3$ and dissolves into water in its ionic form: $Na^+$ and $HCO^{3-}$. Sodium bicarbonate is a base that reacts when it comes into contact with acids, like buttermilk, yogurt or vinegar. 

Baking powder has different ingredients that create $CO _2$ gas at different stages of the baking process. A typical formulation (by weight) could call for 30% sodium bicarbonate, 5–12% monocalcium phosphate, and 21–26% sodium aluminium sulphate.

Baking soda and Baking powder can be distinguished by the ingredients present as well as their reactivity towards acids.

Hence, the given statement is True.