General
Easy
Chemistry-

Which respresent an exothermicre action-

Chemistry-General

  1. N2O(g)+C(s)→CO(g)+N2(g)–131KJ    
  2. N2(g)+O2(s)→2NO(g);ΔE=+181KJ    
  3. 2HgO(s)+180KJ→2Hg(ell)+O2(s)    
  4. C2H2(g)+2H2(g)→C2H6(g);ΔE=–314KJ    

    Answer:The correct answer is: C2H2(g)+2H2(g)→C2H6(g);ΔE=–314KJ

    Book A Free Demo

    +91

    Grade

    Related Questions to study

    General
    chemistry-

    S(rhombic)+O2(g)→SO2(g);ΔH=–297.5KJ S(monoclinic)+O2(g)→SO2;ΔH=–300KJ The data can predict that -

    S(rhombic)+O2(g)→SO2(g);ΔH=–297.5KJ S(monoclinic)+O2(g)→SO2;ΔH=–300KJ The data can predict that -

    chemistry-General
    General
    chemistry-

    The correct thermochemical equation is-

    The correct thermochemical equation is-

    chemistry-General
    General
    chemistry-

    According to the followinreaction C(S)+1/2O2(g)→CO(g),ΔH=–26.4Kcal

    According to the followinreaction C(S)+1/2O2(g)→CO(g),ΔH=–26.4Kcal

    chemistry-General
    General
    chemistry-

    Theheatchangeduringthereaction24gCand128gSfollowingthechangeC+S2→CS2H=22Kcal

    Theheatchangeduringthereaction24gCand128gSfollowingthechangeC+S2→CS2H=22Kcal

    chemistry-General
    General
    chemistry-

    Considerthereaction3O22O3;ΔH=+Ve, from the reactionwe can say that -

    Considerthereaction3O22O3;ΔH=+Ve, from the reactionwe can say that -

    chemistry-General
    General
    physics

    Which one of the following is not Ohm's law? (J current density, E= Electric field,  p=resistivity and  conductivity)

    Which one of the following is not Ohm's law? (J current density, E= Electric field,  p=resistivity and  conductivity)

    physicsGeneral
    General
    physics

    t is the unit of temperature coefficient of resistance?

    t is the unit of temperature coefficient of resistance?

    physicsGeneral
    General
    physics


    What is its resistance across AB?


    What is its resistance across AB?

    physicsGeneral
    General
    physics

    A wire has resistance R subscript 0, What will its resistance if it is stretched to double, What is its length ?

    A wire has resistance R subscript 0, What will its resistance if it is stretched to double, What is its length ?

    physicsGeneral
    General
    chemistry-

    Which one othe reaction is an exothermicreaction-

    Which one othe reaction is an exothermicreaction-

    chemistry-General
    General
    chemistry-

    Which of thfollowing is an end othemicreaction

    Which of thfollowing is an end othemicreaction

    chemistry-General
    General
    chemistry-

    Which of thfollwoinreaction is expected never to bspontaneous–

    Which of thfollwoinreaction is expected never to bspontaneous–

    chemistry-General
    General
    physics

    What is the resistance of an open key?

    What is the resistance of an open key?

    physicsGeneral
    General
    physics

    a simple meter-bridge circuit, the both gaps are bridge by coils P and Q having the smaller resistance. A balance is obtained when the jockey key makes contact at a point of the bridge wire 40 cm from the P end. On shunting the coil Q with a resistance of 50Ω the balance point is moved through 10 cm . What are the resistance of P and Q

    a simple meter-bridge circuit, the both gaps are bridge by coils P and Q having the smaller resistance. A balance is obtained when the jockey key makes contact at a point of the bridge wire 40 cm from the P end. On shunting the coil Q with a resistance of 50Ω the balance point is moved through 10 cm . What are the resistance of P and Q

    physicsGeneral
    General
    chemistry-

    The purification of alumina is called

    The purification of alumina can be done by Baeyer’s process.

    The purification of alumina is called

    chemistry-General
    The purification of alumina can be done by Baeyer’s process.