Q. No.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
Codes
A
B
C
D
1.
3
4
1
2
2.
1
2
3
4
3.
3
2
1
4
4.
4
1
3
2
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Given below are two statements:
| Assertion (A): | Silicones are water-repelling in nature. |
| Reason (R): | Silicones are organosilicon polymers, which have ( - R 2 SiO - ) 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. |
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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 |
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The reason behind carbon showing catenation property but lead does not is:
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. is used as a refrigerant for ice-cream and frozen food.
b. The structure of 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
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The correct statement among the following regarding behavior of in water is -
| 1. | BCI 3 readily undergoes hydrolysis while CCI 4 completely resists hydrolysis. |
| 2. | CCI 4 readily undergoes hydrolysis while BCI 3 completely resists hydrolysis. |
| 3. | Both BCI 3 and CCI 4 readily undergo hydrolysis. |
| 4. | Neither BCI 3 nor CCI 4 undergo hydrolysis. |
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The effect of heating Boric acid at 370 K or above is -
1. Orthoboric acid changes to metaboric acid.
2. Metaboric acid changes to boric oxide.
3. Both '1' and '2'
4. Neither '1' nor '2'
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CO is a poisonous gas because :
| 1. | It forms a complex with hemoglobin. |
| 2. | The CO–Hb complex is about 300 times more stable than the O 2 –Hb complex. |
| 3. | It can kill a person through suffocation on not receiving oxygen. |
| 4. | All of the above. |
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