Home
Class 12
CHEMISTRY
When a mixture of NaCl, K2Cr2O7 and conc...

When a mixture of NaCl, `K_2Cr_2O_7` and conc. `H_2SO_4` is heated in a dry test tube, a red vapour (X) is evolved. This vapour (X) turns an aqueous solution of NaOH yellow due to the formation of Y. X and Y. respectively. are:

A

`CrCl_3 and Na_2 Cr_2 O_7`

B

` Cr Cl_3 and Na_2 CrO_4`

C

`CrO_2 Cl_2 and Na_2CrO_4`

D

`Cr_2 (SO_4)_3 and Na_2 Cr_2 O_7`

Text Solution

Verified by Experts

The correct Answer is:
C
`4NaCl+ K_2 Cr_2 O_7 +6H_2 SO_4 to 4 Na HSO_4 + 2 KHSO_4 + 2 Cr O_2 Cl_2 (X ) +6 H_2 O`
` CrO_2 Cl_2 + 4Na OH to Na_2 CrO_4 (Y ) + 2NaCl +2H_2 O`
` X= CrO_2 Cl_2 `
` Y= Na_2 CrO_4`
Promotional Banner

Topper's Solved these Questions

  • QUESTION PAPER 2020

    KVPY PREVIOUS YEAR|Exercise PART-I (CHEMISTRY )|20 Videos

  • QUESTION PAPER 2013

    KVPY PREVIOUS YEAR|Exercise PART-II ( CHEMISTRY)|10 Videos

  • SOLVED PAPER 2018

    KVPY PREVIOUS YEAR|Exercise EXAMPLE|30 Videos

Similar Questions

Explore conceptually related problems

Mixture of K_2Cr_2O_7 and conc. H_2SO_4 is called

A mixture of K_(2)Cr_(2)O_(7) and conc. H_(2)SO_(4) forms

On heating a mixture of NaCl, K_(2)Cr_(2)O_(7) and conc. H_(2)SO_(4) which of the following is formed ?

The reaction of NaCl and K_2Cr_2O_7 with conc. H_2SO_4 results in the formation of

When a mixture of solid NaCl, solid K_(2)Cr_(2)O_(7) is heated with conc. H_(2)SO_(4) orange red vapours are obtained. These are of the compound

When a mixture of NaCl and KCl is heated with conc. H_2SO_4 and K_2CrO_7 . The red gas obtained is