Consider the following statements about H$_2$S generation using Kipp's apparatus
A. The reagents used are FeS and dil. H$_2$SO$_4$
B. The reagents used are FeS and conc. HNO$_3$
C. H$_2$S can be prepared intermittently (on-demand)
D. Kipp's apparatus consists of three chambers
The option with the correct statements is
Kipp's Apparatus H2S Generation: Statement Analysis
Statement Analysis
We need to evaluate the correctness of the given statements regarding H2S generation using Kipp's apparatus.
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Statement A: The reagents used are FeS and dil. H2SO4.
- This is correct. Kipp's apparatus is commonly used for the laboratory preparation of H2S by reacting iron(II) sulfide (FeS) with dilute sulfuric acid (H2SO4).
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Statement B: The reagents used are FeS and conc. HNO3.
- This is incorrect. Concentrated nitric acid (HNO3) is a strong oxidizing agent and is not typically used with FeS in Kipp's apparatus for simple H2S generation, as it can lead to oxidation products other than H2S.
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Statement C: H2S can be prepared intermittently (on-demand).
- This is correct. A key advantage of Kipp's apparatus is its ability to generate gas on demand by controlling the contact between the solid (FeS) and liquid (dil. H2SO4) reagents.
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Statement D: Kipp's apparatus consists of three chambers.
- This is correct. A standard Kipp's apparatus typically comprises three main sections: a lower reservoir for the acid, a middle section for the solid material, and an upper section to hold the gas and connect to the delivery tube.
Conclusion on Statements
Based on the analysis, statements A, C, and D are correct, while statement B is incorrect.
Identifying the Correct Option
The option that includes only the correct statements (A, C, and D) is the correct answer.
Therefore, Option C (A, C and D only) is the correct choice.
Important Questions from Main Group Elements
The table below contains the following compounds with their characteristics
Compounds
Oxidation state of phosphorus
Number of acidic hydrogens
a. Hypophosphoric acid
b. Pyrophosphorous acid
c. Hypophosphorous acid
d. Orthophosphoric acidp. 5
q. 1
r. 4
s. 3i. 2
ii. 3
iii. 4
iv. 1
The option with the correct match is- The Raschig reaction, involving partial oxidation of $NH_3$ with $NaOCl$, produces P, which upon treatment with $KIO_3$ and $HCl$, forms $KCl$, water, compounds Q and R. The compounds P, Q, and R, respectively, are
Choose the incorrect statement for the phosphomolybdate anion, $[\text{PMo}_{12}\text{O}_{40}]^{3-}$.
- According to Bent's rule, for $p$-block elements, the correct combination of geometry around the central atom and position of more electronegative substituent is
- The numbers of P-S and P-P bonds in the compound $P_4S_3$ are, respectively,
