Difficult
The more commonly used baking powder contains about $30\%$ $NaHCO_3$,$20\%$ $NaAl(SO_4)_2$,$10\%$ $Ca(H_2PO_4)_2$ and $40\%$ starch. Which of the following statements is/are correct?
- A$Ca(H_2PO_4)_2$ is acidic and when moistened it reacts with $NaHCO_3$ evolving $CO_2$ gas
- B$NaAl(SO_4)_2$ slows down the decomposition reaction of $NaHCO_3$ so that $CO_2$ is evolved more slowly
- C$NaAl(SO_4)_2$ is acidic and when moistened it reacts with $NaHCO_3$ evolving $CO_2$
- DBoth $(A)$ and $(B)$
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Similar Questions
The incorrect postulates of the Dalton's atomic theory are :
$A$. Atoms of different elements differ in mass.
$B$. Matter consists of divisible atoms.
$C$. Compounds are formed when atoms of different element combine in a fixed ratio.
$D$. All the atoms of given element have different properties including mass.
$E$. Chemical reactions involve reorganisation of atoms.
Choose the correct answer from the options given below :
$A$. Atoms of different elements differ in mass.
$B$. Matter consists of divisible atoms.
$C$. Compounds are formed when atoms of different element combine in a fixed ratio.
$D$. All the atoms of given element have different properties including mass.
$E$. Chemical reactions involve reorganisation of atoms.
Choose the correct answer from the options given below :
DifficultJEE MAIN 2024
View SolutionMatch the scientist's name in List-$A$ with their statement in List-$B$.
List-$A$ List-$B$ $(1)$ Roald Hoffmann $(A)$ The proportion of the mass of elements in any compound is fixed. $(2)$ Lavoisier $(B)$ The smallest indivisible particle of matter is the atom. $(3)$ Joseph Proust $(C)$ Chemistry is not the science of $100$ elements. $(4)$ Dalton $(D)$ Matter can neither be created nor destroyed.
| List-$A$ | List-$B$ |
| $(1)$ Roald Hoffmann | $(A)$ The proportion of the mass of elements in any compound is fixed. |
| $(2)$ Lavoisier | $(B)$ The smallest indivisible particle of matter is the atom. |
| $(3)$ Joseph Proust | $(C)$ Chemistry is not the science of $100$ elements. |
| $(4)$ Dalton | $(D)$ Matter can neither be created nor destroyed. |
Easy
View SolutionSuppose you have to determine the percentage of carbon dioxide in a sample of a gas available in a container. Which is the best absorbing material for the carbon dioxide?
Easy
View SolutionWhen a jar containing a gaseous mixture of equal volumes of $CO_2$ and $H_2$ is placed in a solution of sodium hydroxide,the solution level will:
Easy
View SolutionThe ratio of the number of water molecules in Mohr's salt and potash alum is $.... \times 10^{-1}$.
DifficultJEE MAIN 2021
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