The percentage by weight of Hydrogen of H2O2 is:

(1) 5.88

(2) 6.25

(3) 25

(4) 50

Subtopic:  H2O2 (Hydrogen Peroxide) |
 61%
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Hard water can be produced by -

(1) Saturation of water with CaSO4

(2) Addition of Na2SO4  to water

(3) Saturation of water with CaCO3

(4) Saturation of water with MgCO3

Subtopic:  Hard & Soft Water |
 61%
From NCERT
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The amount of H2O2  present in 1 L of 1.5 N H2O2  solution is:

1. 2.5 g

2. 25 g

3. 3.0 g

4. 8.0 g

Subtopic:  H2O2 (Hydrogen Peroxide) |
 68%
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Hints

Match the following and identify the correct option

(a) CO(g)+H2(g) (i) Mg(HCO3)2+Ca(HCO3)2
(b) Temporary hardness of water (ii) An electron deficient hydride
(c) B2H6 (iii) Synthesis gas
(d) H2O2 (iv) Non-planar structure
 
(a) (b) (c) (d)
1. (iii) (ii) (i) (iv)
2. (iii) (iv) (ii) (i)
3. (i) (iii) (ii) (iv)
4. (iii) (i) (ii) (iv)
Subtopic:  Hard & Soft Water | H2O2 (Hydrogen Peroxide) |
 85%
From NCERT
NEET - 2020
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Choose reactions to explain the amphoteric nature of water.

1) H2O(l)+NH3(aq)OH-(aq)+NH4+(aq)
2) H2O(l)+H2S(aq)H3O+(aq)+HS-(aq)
3) a & b
4) none

 

Subtopic:  Hydrogen- Types & Isotopes |
 90%
From NCERT
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Atomic hydrogen combines with almost all elements but molecular hydrogen does not because

1. Atomic hydrogen is highly unstable molecular, hydrogen is almost inert at room temperature.

2. Atomic hydrogen is highly inert, molecular hydrogen is almost unstable at room temperature.

3. Atomic hydrogen and molecular hydrogen are unstable.

4. Atomic hydrogen and molecular hydrogen are inert.

Subtopic:  Preparation & Properties |
 81%
From NCERT
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Physical properties in which D2O differs from H2O is/are:

1. solubility of salts in heavy water is less than in ordinary water

2. all physical constants of D2O are higher than H2O. 

3. heavy water is almost 11% denser than light (normal) water.

4. all of the above.

Subtopic:  H2O2 (Hydrogen Peroxide) |
 85%
From NCERT
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Industrial preparation of  is-

1. By the action of dilute sulphuric acid: 

2. By the action of carbon dioxide: 

3. By the action of phosphoric acid: 

Subtopic:  H2O2 (Hydrogen Peroxide) |
 61%
From NCERT
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Structures of  and 

Subtopic:  H2O2 (Hydrogen Peroxide) |
 85%
From NCERT
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Calgon ( a water softener) is : 

1. Na2Na4PO36

2. Na4Na2PO36

3. Na2Na4PO46

4. Na4Na2PO46

 

Subtopic:  Hard & Soft Water |
 65%
From NCERT
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