Which of the following statements are not true for hydrogen?
a. | It exists as a diatomic molecule. |
b. | It has one electron in the outermost shell |
c. | It can lose an electron to form a cation that 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)
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)
Which of the following statements about hydrogen are correct?
1. | Hydrogen has three isotopes of which protium is the most common |
2. | Hydrogen never acts as a cation in ionic salts |
3. | Hydrogen ion, H+, exists freely in solution |
4. | Dihydrogen does not act as a reducing agent |
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Hydrogen resembles halogens in many respects for which several factors are responsible. Of the following factors which one is most important in this respect?
1. | Its tendency to lose an electron to form a cation. |
2. | Its tendency to gain a single electron in its valence shell to attain stable electronic configuration. |
3. | Its low negative electron enthalpy value. |
4. | Its small size. |
H+ ions always get associated with other atoms or molecules due to -
1. | Ionisation enthalpy of hydrogen resembles that of alkali metals |
2. | Its reactivity is similar to halogens |
3. | It resembles both alkali metals and halogens |
4. | Loss of an electron from hydrogen atom results in a nucleus of very small size as compared to other atoms or ions. Due to small size it cannot exist free |
Which of the following reactions increases production of dihydrogen from synthesis gas?
1.
2.
3.
4.
Hydrogen peroxide is obtained by the electrolysis of ______.
1. water
2. sulphuric acid
3. hydrochloric acid
4. fused sodium peroxide