Aluminium reacts with concentrated HCl and concentrated NaOH to liberate which of the following gases respectively-
1. | \(\mathrm{H}_2 ~\text{and} ~\mathrm{H}_2 \) | 2. | \(\mathrm{O}_2 ~\text{and} ~\mathrm{O}_2 \) |
3. | \(\mathrm{O}_2 ~\text{and} ~\mathrm{H}_2 \) | 4. | \(\mathrm{H}_2 ~\text{and} ~\mathrm{O}_2 \) |
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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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A compound among the following that is not a monomer for a high molecular mass silicone polymer is-
1.
2.
3.
4.
The basic structural unit of silicates is-
1. | \( \mathrm{SiO}_4{}^{4-}\) | 2. | \(\left(\mathrm{SiO}_3\right)^{2-} \) |
3. | \(\mathrm{SiO}_4{ }^{2-} \) | 4. | \(\mathrm{SiO}^{-}\) |
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When silicon is boiled with caustic soda solution, the gas is evolved is-
1.
2.
3.
4. None of the above
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
is -
1. A Monobasic acid and a weak Lewis acid.
2. A Monobasic and a weak Bronsted acid..
3. A Monobasic and a strong Lewis acid.
4. A Tribasic and a weak Bronsted acid.
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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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 |
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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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