Which of the following statements are not true for hydrogen.

a.  It exists as diatomic molecule

b.  It has one electron in the outermost shell

c.  It can lose an electron to form a cation which can freely exist

d.  It forms a large number of ionic compounds by losing an electron

Choose the correct option

1. (a, b)

2. (b, c)

3. (c, d)

4. (a, d)

Subtopic:  Hydrogen- Types & Isotopes | Preparation & Properties |
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Dihydrogen can be prepared on a commercial scale by different methods. In its preparation by the action of steam on hydrocarbons, a mixture of CO and H2 gas is formed. It is known as _____.

a.  Water gas

b.  Syngas

c.  Producer gas

d.  Industrial gas

Choose the correct option

1. (a, b)

2. (b, c)

3. (c, d)

4. (a, d)

Subtopic:  Preparation & Properties |
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Which of the following statement(s) is/are correct in the case of heavy water?

a.  Heavy water is used as a moderator in nuclear reactor

b  Heavy water is more effective as solvent than ordinary water

c.  Heavy water is more associated than ordinary water

c.  Heavy water has lower boiling point than ordinary water

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)

Subtopic:  Water |
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Which of the following statements about hydrogen are correct?

a.  Hydrogen has three isotopes of which protium is the most common

b.  Hydrogen never acts as a cation in ionic salts

c.  Hydrogen ion, H+, exists freely in solution

d.  Dihydrogen does not act as a reducing agent

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Hydrogen- Types & Isotopes | Preparation & Properties |
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Hardness of water may be temporary or permanent. Permanent hardness is due to the presence of

a. Chlorides of Ca and Mg in water

b. Sulphates of Ca and Mg in water

c. Hydrogen carbonates of Ca and Mg in water

d. Carbonates of alkali metals in water.

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Hard & Soft Water |
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Which of the following statements is correct?

a.  Elements of group 15 form electron deficient hydrides

b.  All elements of group 14 form electron precise hydrides

c.  Electron precise hydrides have tetrahedral geometries.

d.  Electron rich hydrides can act as Lewis acids.

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Type of Hydride |
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Which of the following statements is correct?

a.  Hydrides of group 13 act as Lewis acids

b.  Hydrides of group 14 are electron deficient hydrides

c.  Hydrides of group 14 act as Lewis acids

d.  Hydrides of group 15 act as Lewis base

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Type of Hydride |
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Correlate the items listed in Column I with those listed in Column II. 

Column I Column II
A. Synthesis gas 1.  Na2[Na4(PO3)6 ]
B. Heavy water 2. Mixture of CO and H2
C. Calgon 3. Prolonged electrolysis of water
D.  Salt like hydrides 4. Stoichiometric compounds of s-block elements

Codes

A B C D
1. 4 3 2 1
2. 2 3 1 4
3. 1 4 3 2
4. 4 1 3 2
Subtopic:  Type of Hydride |
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Match Column I with Column II for the given properties/applications mentioned therein.

Column I

Column II

A. H

1. Used in the name of perhydrol.

B. H2

2. Can be reduced to dihydrogen by NaH.

C. H2O

3. Can be used in hydroformylation of olefin.

D. H2O2

4. Can be used in cutting and welding

Codes

           A         B           C           D

1.       4          3           2           1

2.       1          2           3           4

3.       1          4           3           2

4.       4          1           3           2

Subtopic:  H2O2 (Hydrogen Peroxide) |
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Match the terms in Column I with the relevant item in Column II.

Column I

Column II

A. Atomic hydrogen

1. Atomic reactor

B. Lithium aluminum hydride is used as

2. Polar molecule

C. Hydrogen chloride is a

3. Recombines on metal surface to generate high temperature

D. Heavy water is used in

4. Reducing agent

Codes

          A          B          C           D        

 1.      3          1           2           4        

 2.      3          4           2           1       

 3.      1          4           3           2        

 4.      4          1           3           2        

Subtopic:  H2O2 (Hydrogen Peroxide) |
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