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Consider the following statements : S(...

Consider the following statements `:`
`S_(1) :` A metal chloride on heating with an aqueous solution of `K_(2)Cr_(2)O_(7)` and concentral `H_(2)SO_(4)` produces deep red vapours.
`S_(2) :` Lead nitrate dissolved in water responds to brown ring test.
`S_(3) :` Deep red solution of ferric acetate on boiling with water turns to brownishred solution.
`S_(4) : NaNO_(2)` solution acidified with acetic acid produces blue colour with iodide solution and starch paste of these.

A

`S_(1),S_(2)` and `S_(3)` are correct

B

`S_(1),S_(3)` and `S_(4)` are incorrect

C

Only `S_(3)` and `S_(4)` are in correct

D

All are incorrect

Text Solution

Verified by Experts

The correct Answer is:
1
`CrO_(2)Cl_(2)+2H_(2)OrarrH_(2)CrO_(4)+2HCl`
`2. Pb^(2+)+SO_(4)^(2-)rarr PbSO_(4)darr("brown ring is not clarly visible ")`
`3. (CH_(3)COO)_(3)+H_(2)OrarrFe(OH)_(2)underset("brownish-rad")((CH_(3)COO)darr+2CH_(3)COO )`
`4. NO_(2)^(-)+3I^(-)+4CH_(3)COOHrarrI_(3)^(-)+2NOuarr+4CH_(2)COO^(-)+2H_(2)O`
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Knowledge Check

  • Consider the following statements and arrange in the order of true/false as given in the codes. S_1 :Ammonia chloride on heating with an aqueous solution of K_2Cr_2O_7 and concentrated H_2SO_4 produces deep red vapours. S_2 :Deep red solution of ferric acetate on boiling with water turns to a brownish red solution. S_3 : NaNO_2 solution acidified with acetic acid produces blue colour with a starch paste contaminated , with iodide ion.

    A
    T T F
    B
    F F T
    C
    T F F
    D
    F T T

  • Solution of a salt in dilute H_(2)SO_(4) or acetic acid produces deep blue colour with starch iodide solution.The salt contains:

    A
    `Br^(-)`
    B
    `I^(-)`
    C
    `NO_(3)^(-)`
    D
    `NO_(2)^(-)`

  • The evolution of a red-brown gas on heating a salt with K_(2)Cr_(2)O_(7) and concentrated H_(2)SO_(4) can arise from:

    A
    chlroride
    B
    bromide
    C
    nitrate
    D
    nitrite

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    When a mixture of solid NaCl and solid K_(2)Cr_(2)O_(7) is heated with concentrated H_(2)SO_(4) deep red vapours are obtained.This is due to the formation of:

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