Tritium, a radioactive isotope of hydrogen, emits which of the following particles?

1. Gamma (γ)

2. Neutron (n)

3. Beta β-

4. Alpha (α)

Subtopic:  Hydrogen- Types & Isotopes |
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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) |
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The method used to remove the temporary hardness of water is-

1. Synthetic resins method

2. Calgon's method

3. Clark's method

4. Ion-exchange method

Subtopic:  Hard & Soft Water |
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An incorrect statement among the following regarding hydrogen is -

1. Hydrogen never acts as cation in ionic salts
2. Hydronium ion, H3O+ exists freely in a solution
3. Dihydrogen does not act as a reducing agent
4. Hydrogen has three isotopes of which protium is the most common

Subtopic:  Preparation & Properties |
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The reaction of aqueous KMnO4 with H2O2 in acidic condition gives:
1. Mn4+ and O2
2. Mn2+ and O2
3. Mn2+ and O3
4. Mn4+ and MnO2

Subtopic:  H2O2 (Hydrogen Peroxide) |
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The ease of adsorption of the hydrated alkali metal ions on ion-exchange resins follows the order

1. Li+<K+<Na+<Rb+

2. Rb+<K+<Na+<Li+

3. K+<Na+<Rb+<Li+

4. Na+<Li+<K+<Rb+

Subtopic:  Hard & Soft Water |
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Some statements about water are given below:

(a) Heavy water is used as a moderator in nuclear reactors.
(b) Heavy water is more associated than ordinary water.
(c) Heavy water is a more effective solvent than ordinary water.

Which of the above statements are correct?

1. (a), (b) and (c)

2. (b) and (c)

3. (a) and (c)

4. (a) and (b)

Subtopic:  Hydrogen- Types & Isotopes |
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Pure water can be obtained from sea water by :

1.  Centrifugation
2.  Plasmolysis
3.  Reverse osmosis
4.  Sedimentation

Subtopic:  Water |
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 H2Oon oxidation gives :

1. O-2

2. OH-

3. O2-

4. O2

Subtopic:  H2O2 (Hydrogen Peroxide) |
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The pair that on reaction will not evolve H2 gas is : 

1.  Copper and HCl (aqueous)
2.  Iron and steam
3.  Iron and H2SO4 (aqueous)
4.  Sodium and ethyl alcohol

Subtopic:  Preparation & Properties |
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