Question
What are the following substance? Give one example.
Antacids.
Antacids.
✓
Answer
Antacids:
Chemical substances which remove the excess acid in the stomach and raise the pH to appropriate level, e.g., sodium hydrogencarbonate, a mixture of aluminium and magnesium hydroxide, ranitidine, etc.
Chemical substances which remove the excess acid in the stomach and raise the pH to appropriate level, e.g., sodium hydrogencarbonate, a mixture of aluminium and magnesium hydroxide, ranitidine, etc.
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Explain reaction of carboxylic acids with metals and alkalies. ### Write the equations for the reactions showing that carboxylic acids are acidic in nature and state theusefulness of this reactions.
Explain the following line giving one example:
Antibiotics.
Antibiotics.
- What is meant by the term 'coordination number'?
- What is the coordination number of atoms:
- In a cubic close-packed structure?
- In a body-centred cubic structure?
Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: The total number of atoms present in a simple cubic unit cell is one.
Reason: Simple cubic unit cell has atoms at its corners, each of which is shared between eight adjacent unit cells.
Assertion: The total number of atoms present in a simple cubic unit cell is one.
Reason: Simple cubic unit cell has atoms at its corners, each of which is shared between eight adjacent unit cells.
Observe the following cell and answer the questions that follow:
$a.$ Represent the cell shown in the figure.
$b.$ Name the carriers of the current in the salt bridge
$c.$ Write the reaction taking place at the anode.
→$a.$ Represent the cell shown in the figure.
$b.$ Name the carriers of the current in the salt bridge
$c.$ Write the reaction taking place at the anode.
Calculate the efficiency of packing in case of a metal crystal for:
Simple cubic.
Simple cubic.
Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: $E_{Cell}$ should have a positive value for the cell to function.
Reason: $\text{E}_{\text{cathode}}<\text{E}_{\text{anode}}$
→Assertion: $E_{Cell}$ should have a positive value for the cell to function.
Reason: $\text{E}_{\text{cathode}}<\text{E}_{\text{anode}}$
Match the structures of the compounds given in Column I with the name of the compounds given in Column II.
| Column I | Column II | ||
| (i) |  |
(a) | Hydroquinone |
| (ii) |  |
(b) | Phenetole |
| (iii) |  |
(c) | Catechol |
| (iv) |  |
(d) | o-Cresol |
| (v) |  |
(e) | Quinone |
| (vi) |  |
(f) | Resorcinol |
| (g) | Anisole. |
Complete the following reactions :
→- $\text{C}l_2+\text{H}_2\text{O}\xrightarrow{\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }}$
- $\text{XeF}_6+3\text{H}_2\text{O}\xrightarrow{\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }\text{ }}$
Write common name and $IUPAC$ name of following alcohol compound.
$CH_3-CH_2-CH_2-OH$
→$CH_3-CH_2-CH_2-OH$