Home
Class 12
CHEMISTRY
Select correct statement. (i) Mixture...

Select correct statement.
(i) Mixture of `NH_4Cl` and `NaNO_2` on heating gives `N_2` gas .
( ii) CFC is used as refrigerating fluid and as propellant in aerosols
( iii) Phosgene is formed when `P_4` reacts with NaOH
(iv) Phosgene dissolves in water forming `P_2O_5`

A

i and ii

B

ii and iii

C

iii and iv

D

i only

Text Solution

Verified by Experts

The correct Answer is:
A
Phosgene `(COCl_2)` is produced by passing purified carbon monoxide and chlorine gas through a bed of porous activated carbon.
Promotional Banner

Topper's Solved these Questions

  • P-BLOCK ELEMENTS

    BRILLIANT PUBLICATION|Exercise LEVEL II (ASSERTION AND REASON)|20 Videos

  • P-BLOCK ELEMENTS

    BRILLIANT PUBLICATION|Exercise LEVEL-I|50 Videos

  • P-BLOCK ELEMENTS

    BRILLIANT PUBLICATION|Exercise LEVEL-III|50 Videos

  • NUCLEAR CHEMISTRY

    BRILLIANT PUBLICATION|Exercise LEVEL-III (Linked Comprehension Type) |11 Videos

  • POLYMERS, BIOMOLECULES AND CHEMISTRY IN EVERYDAY LIFE

    BRILLIANT PUBLICATION|Exercise LEVEL -III (Comprehension Type) |12 Videos

Similar Questions

Explore conceptually related problems

K2Cr2O7 reacts with NH4Cl in presence of H2SO4 The product formed is

The correct statement(s) regarding (i) HClO, (ii) HClO_2 , (iii) HClO_3 and (iv) HClO_4 , is (are)

Rationalise the statements and give chemical reactions. (i) Lead (II) Chloride reacts with Cl_2 to give PbCl_4

In experiment I 200 ml 0.1 M NaOH is mixed with 100 ml 0.1 M H_(2) SO_(4). In experiment II 100 ml 0.1 M NaOH is mixed with 50 ml 0.1 MH_(2) SO_(4). Select the correct statement. a) Heat liberated in each of the two reactions is 274 cal b) Heat liberated in I is 274 cal and Il is 137 cal c) Temperature rise in I is more than that in II d) Temperature rise in I is equal to the temperature rise in II

Aq. CuSO_(4) is electrolysed using Pt electrodes. The volume of O_(2) gas (as STP) formed at the anode when 2A current is passed for 193 seconds is

Assertion : The water gas shift reaction can be used to increase the amount of H_(2) in the 'syn gas' mixture. Reason : In this reaction, water is reduced to H_(2) by CO (I) If both assertion and reason are correct and reason is the correct explanation of assertion. (II) Both assertion and reason are correct but reason is not the correct explanation of assertion (III) If assertion is correct and reason is not correct (IV) Assertion is wrong and reason is correct

Assertion : Calgon is used in the manufacture of soft water used for laundry purpose Reason : Ca^(2+) and Mg^(2+) ions present in hardwater are rendered ineffective by calgon forming their soluble complexes. (I) If both assertion and reason are correct and reason is the correct explanation of assertion. (II) Both assertion and reason are correct but reason is not the correct explanation of assertion (III) If assertion is correct and reason is not correct (IV) Assertion is wrong and reason is correct

When a white crystalline compound 'X' is heated with K_(2)Cr_(2)O_(7) and concentrated H_(2)SO_(4) a red dish brown gas 'A' is evolved. On passing 'A' into caustic soda solution, a yellow coloured solution of 'B' is obtained. Neutralising the solution 'B' with acetic acid and on subsequent addition of lead acetate a yellow precipitate C is obtained. When 'X' is heated with NaOH a colourless gas is evolved and on passing this a gas into K_(2)HgI_(4) (Nessler's reagent) solution a reddish brown precipitate D is formed. Identify '(A), (B), (C), (D) and X. Write equations for the reactions involved.

BRILLIANT PUBLICATION-P-BLOCK ELEMENTS-LEVEL II
  1. Which of the following is correct?

    Text Solution

    |

  2. The oxyacid of phosphorus in which phosphorus has the lowest oxidation...

    Text Solution

    |

  3. How many peroxy linkages are present in pyrophosphric acid?

    Text Solution

    |

  4. Which of the following options are true (T) and which are false (F) ? ...

    Text Solution

    |

  5. Which of the following series of fluorides is known?

    Text Solution

    |

  6. The compounds of S obtained by reaction of S and conc. hot KOH when re...

    Text Solution

    |

  7. Which of the following pseudohalides does not form dimer like halogen ...

    Text Solution

    |

  8. Which blue-liquid is obtained on reacting equimolar amounts of two gas...

    Text Solution

    |

  9. Select correct statement. (i) Mixture of NH4Cl and NaNO2 on heating...

    Text Solution

    |

  10. The true statement for the acids of phosphorus, 'H3PO2, H3PO3 and H3...

    Text Solution

    |

  11. NH4Cl(s) is heated in a test tụbe. Vapours are brought in contact with...

    Text Solution

    |

  12. The thermal stability of hydrides of oxygen family is in order :

    Text Solution

    |

  13. Which of the following can convert acidified Cr2O7^(2-) to green? SO2/...

    Text Solution

    |

  14. Bleaching of a fabric cloth is done using Aand excess of chlorine is r...

    Text Solution

    |

  15. Select incorrect statement

    Text Solution

    |

  16. Which of the underlined atoms in oxyacids have sp^3 hybridised atoms?

    Text Solution

    |

  17. In the preparation of HBr or HI, NaX (X=Br, I) is treated with H3PO4 a...

    Text Solution

    |

  18. Cl2O , Br2O, I2O have positive value of DeltaG (free energy) indicati...

    Text Solution

    |

  19. Select correct statements:

    Text Solution

    |

  20. Basic character of fluorides increases in the order X e F 6 < X e F 4...

    Text Solution

    |