The incorrect statement among the following options is:

1. K+ ions react with alkaline water and give K(OH)3

2. KCl is a salt of strong acid and strong base.

3. Al(OH)3 in alkaline condition gives [Al(OH)4]-

4. AlCl3 is a salt of strong acid and weak base.

Subtopic:  Hard & Soft Water |
 54%
From NCERT
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True statement among the following options is/are:

1. NH3 is a covalent molecule.
2. The metals of d–block form metallic or non–stoichiometric hydrides.
3. Potassium hydride reacts violently with water.
4. All of these.

Subtopic:  Type of Hydride |
 91%
From NCERT
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Incorrect statement among the following options is:

1. Hydrogen economy is a technique of using dihydrogen in an efficient way.
2. Ni is used as catalyst in hydrogenation of vegetable oil to give edible fats.
3. Syngas is a mixture of carbon monoxide and dihydrogen.
4. In a water gas shift reaction, CO will form as final product.

Subtopic:  Water |
 80%
From NCERT
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Hydrolysis and hydration are:

1. Different chemical process

2. Same chemical process

3. Can be used simultaneously

4. All of these

Subtopic:  Water |
 71%
From NCERT
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The reaction in which hydrogen peroxide acts as a reducing agent is/are-

1. Mn+2 +H2O2  Mn+4 +2OH-

2. PbS +4H2O2  PbSO4 +4H2O

3. I2 + H2O2 + 2OH-  2I- +2H2O+ O2

4. All of the above

Subtopic:  H2O2 (Hydrogen Peroxide) |
 65%
From NCERT
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The following reaction is an example of :

\(2 \mathrm{MnO}_4^{-}+6 \mathrm{H}^{+}+5 \mathrm{H}_2 \mathrm{O}_2 \rightarrow 2 \mathrm{Mn}^{2+}+8 \mathrm{H}_2 \mathrm{O}+5 \mathrm{O}_2\)

1. Hydrolysis reaction

2. Redox reaction

3. Disproportionation reaction

4. None of the above

Subtopic:  Preparation & Properties | H2O2 (Hydrogen Peroxide) |
 68%
From NCERT
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The reaction that is not an example of a hydrolysis reaction is-

1. PbS(s) +H2O2(aq) PbSO4(s) + H2O(l)

2. CaO(s) + H2O(g)  Ca(OH)2 (aq)

3. AlCl3(g) + 3H2O(l) Al2O3(s) + 6HCl(aq)

4. Ca3N2(s) + 6H2O(l) 3Ca(OH)2(aq) + 2NH3(g)

Subtopic:  Water |
 63%
From NCERT
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Incorrect statement regarding structure of H2O and H2O2 is:

1. In gaseous phase, water molecule has a bent form.

2. Bond angle of water is 109.0°

3. Hydrogen peroxide has a non-planar structure.

4. The dihedral angle of H2Oin gas phase is 111.5° 

Subtopic:  Water | H2O2 (Hydrogen Peroxide) |
 70%
From NCERT
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NH3 is an example of :

1. Electron rich hydride

2. Electron-precise hydride

3. Electron deficient hydride

4. None of the above

Subtopic:  Type of Hydride |
 77%
From NCERT
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Hydrogen is placed separately in the periodic table because : 

1. It resembles alkali metals.

2. It shows the same reactions as halogens.

3. Both (1) and (2)

4. None of the above.

Subtopic:  Hydrogen- Types & Isotopes |
 93%
From NCERT
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