Nascent hydrogen consists of :

hydrogen atoms with excess energy

hydrogen molecules with excess energy

hydrogen ions in an excited state

The percentage of a para-hydrogen in ordinary hydrogen increases when:

pressure is increased and temperature decreased

Para- hydrogen at room temp is:

less stable than ortho- hydrogen

more stable than ortho- hydrogen

An incorrect statement among the following regarding hydrogen is -

Dihydrogen does not act as a reducing agent

Hydrogen never acts as cation in ionic salts

Hydronium ion, H 3 O + exists freely in solution

Hydrogen has three isotopes of which protium is the most common

Chemistry - Hydrogen - Quiz-4

The ease of adsorption of the hydrated alkali metal ions on ion-exchange resins follows the order

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$L i^{+} < K^{+} < N a^{+} < R b^{+}$
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$R b^{+} < K^{+} < N a^{+} < L i^{+}$
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$K^{+} < N a^{+} < R b^{+} < L i^{+}$
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$N a^{+} < L i^{+} < K^{+} < R b^{+}$

The method used to remove the temporary hardness of water is-

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Synthetic resins method
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Calgon's method
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Clark's method
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Ion-exchange method

The dipole moment of $H_{2} O_{2}$ is more than that of $H_{2} O$ but $H_{2} O_{2}$ is not a good solvent because :

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It has a very high dielectric constant so that ionic compounds cannot be dissolved in it.
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It does not act as an oxidising agent
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It acts as a reducing agent
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It dissociates easily and acts as an oxidising agent in chemical reactions

Of the two solvents $H_{2} O a n d D_{2} O$ , NaCl dissolves:

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equally in both
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only in $H_{2} O$
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more in $D_{2} O$
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more in $H_{2} O$

Heavy water is ......% heavier than ordinary water

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11
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20
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25
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15

The decomposition of $H_{2} O_{2}$ can be slowed down by the addition of small amount of phosphoric acid which act as:

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stopper
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detainer
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inhibitor
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promoter

The hair dyes available in the market generally contain two bottles, one containing the dye and the other hydrogen peroxide. Before applying the dye, the two solutions are mixed. The hydrogen peroxide:

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is added to dilute the solution of the dye
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oxidizes the dye to give the desired color
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reduces the dye to give the desired color
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acidifies the solution of the dye

Benzene is oxidised by $H_{2} O_{2}$ in the presence of $F e S O_{4}$ to:

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phenol
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cyclohexane
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benzaldehyde
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benzoic acid

The rubber foam is produced by passing oxygen through rubber foaming material. This oxygen is released from:

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nitric oxide
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hydrogen peroxide
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Water
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$C O_{2}$

$H_{2} O_{2}$ is stored in:

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Iron container after the addition of stabilizer
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Glass container after the addition of stabilizer
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Plastic container after the addition of stabilizer
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None of the above

Acidified $K M n O_{4}$ is decolourised by:

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oxygen
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hydrogen
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nitric oxide
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nascent hydrogen

The role of $H_{2} O_{2}$ when added to a solution containing ${KMnO}_{4} and H_{2} {SO}_{4}$ is of-

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Both as an oxidizing as well as a reducing agent
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An oxidizing agent
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A reducing agent
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None of the above

The correct statement among the following regarding reaction of $H_{2} O_{2}$ with potassium ferrocyanide to ferricyanide is -

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$F e^{2 +} \to F e^{3 +}$
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$F e \to F e^{2 +}$
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$F e^{3 +} \to F e^{2 +}$
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$F e^{2 +} \to F e^{+}$

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Practice Chemistry Quiz Questions and Answers

0:0:1

Practice Chemistry Quiz Questions and Answers

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