Q. No.Match the species given in Column I with the properties mentioned in Column II.
Column I
Column II
A. \(\text{BF}^-_4\)
1. Oxidation state of the central atom is +4
B. AlCl3
2. Tetrahedral shape
C. SnO
3. Lewis acid
D. PbO2
4. Can be further oxidized
Codes:
A
B
C
D
1.
2
3
4
1
2.
1
2
3
4
3.
1
4
3
2
4.
4
1
3
2
Match the species given in Column I with properties given in Column II.
| Column I | Column II | ||
| A. | Diborane | 1. | Used as a flux for soldering metals |
| B. | Quartz | 2. | Crystalline form of silica |
| C. | Borax | 3. | Banana bonds |
| D. | Aluminosilicate | 4. | Used as a catalyst in petrochemical industries |
| A | B | C | D | |
| 1. | 3 | 4 | 1 | 2 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 3 | 2 | 1 | 4 |
| 4. | 4 | 1 | 3 | 2 |
Given below are two statements:
| Assertion (A): | Silicones are water-repelling in nature. |
| Reason (R): | Silicones are organosilicon polymers, which have (- R2SiO - ) as repeating units. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Why does carbon show a much greater tendency for catenation than lead?
1. Due to the smaller size of C than that of Pb
2. Due to the smaller size of Pb than that of C
3. Due to the smaller ionization energy of C than that of Pb
4. Due to the inert pair effect
Identify the correct statements among the following:
| a. | CO2 (g) is used as a refrigerant for ice-cream and frozen food. |
| b. | The structure of C60 contains twelve six-carbon rings and twenty five-carbon rings. |
| c. | ZSM-5, a type of zeolite, is used to convert alcohol into gasoline. |
| d. | CO is a colourless and odourless gas |
1. (a) and (c) only
2. (b) and (c) only
3. (c) and (d) only
4. (a), (b) and (c) only
Which of the following statements correctly explains the difference in the hydrolysis of BCl₃ and CCl₄?
1. BCl₃ undergoes hydrolysis readily, whereas CCl₄ resists hydrolysis.
2. CCl₄ undergoes hydrolysis readily, whereas BCl₃ resists hydrolysis.
3. Both BCl₃ and CCl₄ undergo hydrolysis readily.
4. Neither BCl₃ nor CCl₄ undergoes hydrolysis.
Find the correct nature of boric acid, H₃BO₃:
1. Protic acid.
2. Weak monobasic acid.
3. Lewis acid.
4. Both '2' and '3'
What is the effect of heating H₃BO₃ at 370 K and above?
1. Orthoboric acid changes to metaboric acid.
2. Metaboric acid changes to boric oxide.
3. Both '1' and '2'
4. Neither '1' nor '2'
Which of the following statements correctly explain the poisonous nature of carbon monoxide (CO)?
| 1. | It forms a complex with hemoglobin. |
| 2. |
The CO–Hb complex is approximately 300 times more stable than the O₂–Hb complex. |
| 3. |
It reduces oxygen transport in the blood, potentially causing fatal tissue hypoxia. |
| 4. | All of the above. |
Identify the pair in which both oxides are amphoteric in nature.
1. Tl₂O₃ and SiO₂
2. CO₂ and B₂O₃
3. B₂O₃ and SiO₂
4. Al₂O₃ and PbO₂
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