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
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. |
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 |
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. | 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
The correct statement among the following regarding behavior of in water is -
| 1. | BCI3 readily undergoes hydrolysis while CCI4 completely resists hydrolysis. |
| 2. | CCI4 readily undergoes hydrolysis while BCI3 completely resists hydrolysis. |
| 3. | Both BCI3 and CCI4 readily undergo hydrolysis. |
| 4. | Neither BCI3 nor CCI4 undergo hydrolysis. |
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'
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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