Home
Class 12
CHEMISTRY
When A + Water to C + B, B is reacted wi...

When A + Water `to` C + B, B is reacted with D, gas C again obtained. 'D' gives 'C' with `H_(2)SO_(4)`. B gives yellow colour with bunsen flame. C is a flamable gas then what would be A, B, C and D :

A

`K, H_(2), NaOH, Zn`

B

`Na, NaOH, H_(2), Zn`

C

`Li, H_(2), LiOH, Zn`

D

None of the above

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem step by step, we need to analyze the information given in the question and deduce the identities of compounds A, B, C, and D. ### Step 1: Analyzing the Reaction The reaction is given as: \[ A + \text{Water} \rightarrow C + B \] From this, we know that compound A reacts with water to produce compound C and compound B. ### Step 2: Identifying Compound B We are told that: - B gives a yellow color with a Bunsen flame. - C is a flammable gas. The yellow flame indicates the presence of sodium, as sodium compounds produce a yellow flame when burned. Therefore, we can conclude that: - **B is likely sodium hydroxide (NaOH)**, which is a product of sodium reacting with water. ### Step 3: Identifying Compound A Since B is sodium hydroxide, we can deduce that: - **A must be sodium (Na)**, because sodium reacts with water to produce sodium hydroxide and hydrogen gas. ### Step 4: Identifying Compound C From the reaction, we know that: - C is a gas produced in the reaction. - Since sodium reacts with water, it produces hydrogen gas (H₂) along with sodium hydroxide. Thus, we can conclude: - **C is hydrogen gas (H₂)**. ### Step 5: Identifying Compound D The question states: - B reacts with D to produce gas C again. - D gives C when reacted with H₂SO₄. Since we know that B is NaOH and it reacts with D to produce hydrogen gas, we can consider a metal that reacts with NaOH to produce hydrogen. - A suitable candidate for D is zinc (Zn), as it reacts with NaOH to produce sodium zincate and hydrogen gas. ### Final Summary of Compounds Based on the above deductions: - **A = Sodium (Na)** - **B = Sodium Hydroxide (NaOH)** - **C = Hydrogen Gas (H₂)** - **D = Zinc (Zn)** ### Final Answer: - A = Sodium (Na) - B = Sodium Hydroxide (NaOH) - C = Hydrogen Gas (H₂) - D = Zinc (Zn)
Promotional Banner

Similar Questions

Explore conceptually related problems

When a substance A reacts with water it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with this solution of C, it also produces the same gas B on warming but D can produce gas B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour a smokeless flame to Bunsen burner. A,B,C, and D respectively are :

An aliphatic hydrocarbon A on treatment with sulphuric acid in the presence of HgSO_4 yields a liquid B with molecular formula C_2H_4O . Bon oxidation with acidified potassium dichromate yields C which gives effervescence with sodium bicarbonate. C when treated with SOCl_2 gives D. When D reacts with ethanol it gives a sweet smelling liquid E. E is also formed when C reacts with ethanol in the presence of conc. H_2SO_4 . Identify A, B, C, D and E.

A solid laboratory reagent (A) give following reactions. (i) It impart green colour of flame : (ii) Its solution does not give ppt. on passong H_(2)S . (iii) When it is heated with K_(2)Cr_(2)O_(7) and conc. H_(2)SO_(4) , a red gas (B) is evolved. The gas when passed in aq. NaOH solution turns it yellow (C). Identify (A), (B), (C) giving chemical reactions.

An organic compound (A) (C_(5)H_(7)OCl) reacts rapidly with ethanol to give (B) (C_(7)H_(12)O_(2)) . (A) also reacts with water to produce an acid which reacts with bromine to give (C ) (C_(5)H_(8)Br_(2)O_(2)) . (B) on boiling with H_(2)SO_(4) forms an acid (D). When (D) is oxidised with KMnO_(4) an acid (E ) (C_(4)H_(6)O_(3)) is produced. On mild heating, (E ) gives (F) (C_(3)H_(6)O) which cannot be oxidised by ammoniacal AgNO_(3) . Identify the compounds (A) to (F).

An alkyl halide C_(5)H_(11) (A) reacts with ethanolic KOH to give an alkene 'B' which reacts with Br_(2) to give a compound 'C' which on dehydromination gives an alkyne 'D' . On treatment with sodium metal in liquid ammonia one mole of 'D' give one mole of the sodium salt of 'D' and half a mole of hydrogen gas . Complete hydrogenation of 'D' yields a straight chain alkane. Identify A, B, C and D . Give the the reactions involved.

An aqueous solution of salt (A) gives a give a white precipitate ( B) with sodium chloride solution . Compound ( B) dissolves in hot water and the solution on treatment with sodium iodide give a yellow precipitate ( D) ,. and on passing H_2 S through solution ( B) gives a black ppt . (C) . Compound (A) does not give any gas with dil HCl , but liberates a reddish brown gas on heating identify compounds (A), (B), ( C) , and (D) .

Oixalic acid on stragheating gives (A) and (B) which are gaseous prouct and ( C) which is a liwue . Gas (B) turns lime water miky. Gas (A) on reaction with chlorine gas gives (D) . (D)m as wll as (B) on heating with ammonia gas gives the same produce ( E) . Identify (A) ,(B), ( C), (D) and ( E).

CaCO_3 on heating gives a white solid (A) and a gas (B), (A) on heating with carbon gives a solid (C) and a gas (D), (C) on hydrolysis glves a gas (E) and a solid (F) Identify (A), (B), (C), (D) , (E) and (F) .

An alcohol A, when heated with conc. H_(2)SO_(4) gives an alkene B. When B is bubbled through bromine water and the product obtained is dehydrohalogenated with exccess of sodamide, a new compound C is obtained. The compound C gives D when treated with warm dilute H_(2)SO_(4) in the presence of HgSO_(4) . D can also be obtained either byh oxidising A with KMnO_(4) or form acetic acid through its calcium salt. Identify A, B, C, and D.

An aliphatic hydrocarbon A on treatment with sulfuric acid in the oresence of HgSO_(4) yields a liquid B with molecular formula C_(2)H_(4)O . B on oxidation with acidified potassium dichromate yields C which gives effervescence with sodiumn bicarbonte. C when treated with SOCl_(2) gives D. When D reacts with ethanol, it gives a sweet smelling liquid E. E is also formed when C reacts with ethanol in the presence of conc. H_(2)SO_(4) Write the balanced equation for the conversion of A to B.