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The least random state of H(2)O system i...

The least random state of `H_(2)O` system is

A

Ice

B

Liquid water

C

Steam

D

Same in all.

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The correct Answer is:
A
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The structure of H_(2)O_(2) is

The approximate mass of H_(2)O_(2) present in 200mL of 100 volume H_(2)O_(2) solution is

The least soluble hydroxide in H_(2)O is

H_(2)O_(2) acts both as oxidant and reductant. H_(2)O and O_(2) are products when H_(2)O_(2) acts as oxidant and reductant respectively. The strength of H_(2)O_(2) is expressed in terms of molarity, normality, % strength and volume strength. H_(2)O_(2) decomposes as H_(2)O_(2)rarrH_(2)+1//2O_(2)(g) i.e., one mole O_(2) is released from 2 mole H_(2)O_(2) .x. .volume. strength of H_(2)O_(2) means 1 volume (mL or litre) of H_(2)O_(2) sample released x volume (mL or litre) O_(2) gas at NTP on its decomposition. Hence molarity = x//11.2 moles per litre, i.e., normality of H_(2)O_(2)=x//5.6 Thus volume strength, i.e., x=5.6xx Normality. Weigth of H_(2)O_(2) (in gm) present in 100 mL H_(2)O_(2) solution is called percentage strength of H_(2)O_(2) How much volume of H_(2)O_(2) solution of 22.4 .vol. strength is required to oxidise 6.3 gm oxalic acid

Identify the correct statements from the following . (i) Oxygen shows -2,-1,+1 and +2 oxidation states. (ii) The thermal stability of H_(2)O, H_(2)Se and H_(2)S follows the order H_(2)O ltH_(2)S lt H_(2)Se. (iii) The reducing nature of H_(2)Se,H_(2)S and H_(2) Te follows the order H_(2)S ltH_(2)Se ltH_(2)Te

Pure H_(2)O_(2) is not very stable and decomposes in the presence of light or on standing or heating overset((-1))(H_(2)O_(2l))+overset((2-)) (H_(2)O_((l)))+overset((0))(O_(2(g))) The oxidation state of oxygen in H_(2)O_(2) is 1 it is oxidistion state of zero in O_(2) and is reduced to an oxidation state of -2 in H_(2)O . Thus, this decomposition is an example of auto oxidation reduction reaction or disproportionation reaction. Pure H_(2)O is

Pure H_(2)O_(2) is not very stable and decomposes in the presence of light or on standing or heating overset((-1))(H_(2)O_(2l))+overset((2-)) (H_(2)O_((l)))+overset((0))(O_(2(g))) The oxidation state of oxygen in H_(2)O_(2) is 1 it is oxidistion state of zero in O_(2) and is reduced to an oxidation state of -2 in H_(2)O . Thus, this decomposition is an example of auto oxidation reduction reaction or disproportionation reaction. 30-volume, hydrogen peroxide means

Pure H_(2)O_(2) is not very stable and decomposes in the presence of light or on standing or heating overset((-1))(H_(2)O_(2l))+overset((2-)) (H_(2)O_((l)))+overset((0))(O_(2(g))) The oxidation state of oxygen in H_(2)O_(2) is 1 it is oxidistion state of zero in O_(2) and is reduced to an oxidation state of -2 in H_(2)O . Thus, this decomposition is an example of auto oxidation reduction reaction or disproportionation reaction. The compound which gives H_(2)O_(2) on treatment with dilute acid is

When PbS is oxidised by H_(2)O_(2) the increase in oxidation state of sulphur is

When mercury is oxidised by H_2O_2 the increase in oxidation state of mercury is

AAKASH SERIES-CHEMICAL THERMODYNAMICS-OBJECTIVE EXERCISE - 1 (ENTORPY AND GIBBS ENERGY)
  1. Entropy of a system depends upon

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  2. One of the following reactions involves in decrease of entropy

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  3. The least random state of H(2)O system is

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  4. For the reaction I(2(g)) hArr I(2(s)), Delta H= -ve. Then choose the c...

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  5. Which of the following process has negative value of DeltaS?

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  6. For a spontaneous process, in a reaction

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  7. Some statements are given with regard to entropy. The incorrect statem...

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  8. For an irreversible process, the value of [DeltaS("(system)") + DeltaS...

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  9. A process is spontaneous at all temperatures when

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  10. 2H(2(g)) + O(2(g)) rarr 2H(2)O((l)) , DeltaH= -ve and DeltaG= -ve. The...

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  11. H((aq))^(+) + OH((aq))^(-) rarr H(2)O((l)) , Delta H = -ve and Delta G...

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  12. Among the following what is necessary condition for spontanity of a pr...

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  13. Which of the following is the condition for a non spontaneous reaction...

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  14. Based on the third law of themodynamics, the entropy can be obtained u...

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  15. A chemical reaction cannot occur at all if its

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  16. An equilibrium reaction X + Y hArr W +Z, Delta H= +ve is spontaneous i...

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  17. For the process Dry ice rarr CO(2(g))

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  18. For which of the process, Delta S is negative?

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  19. The process of evaporation of a liquid is accompanised by (A) Increa...

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  20. The favourable conditions for a spontaneous reaction are

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