Dehydration of hydrates of halides of calcium, barium and strontium i.e., , , , can be achieved by heating.
These become wet on keeping in air. Which of the following statements is correct about these halides?
1. | Act as dehydrating agent |
2. | Can adsorb moisture from air |
3. | Tendency to form hydrate decreases from calcium to barium |
4. | All of the above |
Metallic elements are described by their standard electrode potential, fusion enthalpy, atomic size, etc. The alkali metals are characterized by which of the following properties?
a. High boiling point
b. High negative standard electrode potential
c. High-density
d. Large atomic size
1. (a, b)
2. (b, c)
3. (c, d)
4. (b, d)
Several sodium compounds find use in industries. Which of the following compounds are used in the textile industry?
a.
b.
c.
d.
Choose the correct option
1. (a, c)
2. (b, c)
3. (c, d)
4. (a, d)
Which of the following compounds are readily soluble in water?
a.
b.
c.
d.
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
When zeolite, which is hydrated sodium aluminium silicate is treated with hard water, the sodium ions are exchanged with which of the following ion(s)?
a. ions
b. ions
c. ions
d. ions
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Identify the correct formula of halides of alkaline earth metals from the following.
1.
2.
3.
4.
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Choose the correct statements from the following.
a | Beryllium is not readily attacked by acids because of the presence of an oxide film on the surface of the metal |
b. | Beryllium sulphate is readily soluble in water as the greater hydration enthalpy of Be2+ overcomes the lattice enthalpy factor |
c | Beryllium exhibits coordination number more than four |
d | Beryllium oxide is purely acidic in nature |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Which of the following are the correct reasons for the anomalous behavior of lithium?
a. Exceptionally small size of its atom
b. Its high polarising power
c. It has high degree of hydration
d. Exceptionally low ionisation enthalpy
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Match the elements given in Column I with the properties mentioned in Column II.
Column I |
Column II |
A. Li |
1. Insoluble sulphate |
B. Ca |
2. Strongest monoacidic base |
C. Na |
3. Most negative value among alkali metals |
D. Ba |
4. Insoluble oxalate |
Codes
Options: | A | B | C | D |
1. | 3 | 2 | 4 | 1 |
2. | 1 | 2 | 3 | 4 |
3. | 1 | 4 | 3 | 2 |
4. | 3 | 4 | 2 | 1 |
Match the compounds given in Column I with their uses mentioned in Column II.
Column I |
Column II |
A. CaCO3 |
1. Dentistry, ornamental work |
B. Ca(OH)2 |
2. Manufacture of sodium carbonate from caustic soda |
C. CaO |
3. Manufacture of high-quality papers |
D. CaSO4 |
4. Used in whitewashing |
Codes
Options: | A | B | C | D |
1. | 3 | 4 | 2 | 1 |
2. | 1 | 2 | 3 | 4 |
3. | 1 | 4 | 3 | 2 |
4. | 4 | 1 | 3 | 2 |