Select the correct statement(s) regarding the following reaction sequence:
1. The compound (A) is
2. The compound D is SiC
3. The compound (B) is
4. All of the above
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Amphoteric oxides are:
1. Tl2O3, SiO2
2. ,
3. ,
4. Al2O3 , PbO2
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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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The incorrect statement among the following options is-
1. | Conc. HNO3 can be transported in an aluminium container. |
2. | Diamond is used as an abrasive. |
3. | A mixture of dilute NaOH and aluminium pieces is used to declog the drain. |
4. | Graphite can't be used as a lubricant. |
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The species among the following that does not exist is-
1.
2.
3.
4.
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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
The incorrect statement among the following is -
1. is amphoteric
2. is more stable than
3. is weakly acidic
4. GeCl4 + 2HCl ⇄ H2[GeCl6]
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The correct statement among the following is :
1. | Sn2+ is an oxidizing agent while Pb4+ is a reducing agent. |
2. | Sn2+ and Pb2+ both are oxidizing agents. |
3. | Sn4+ is a reducing agent while Pb4+ is an oxidizing agent. |
4. | Sn2+ is a reducing agent while Pb4+ is an oxidizing agent. |
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The incorrect statement among the given options is-
1. | Inert pair effect is because of the poor shielding of the ns2 electrons by the d- and f- electrons. |
2. | Allotropy is the existence of an element in more than one form. |
3. | Catenation is the bonding of atoms of the same element into a series, called a chain. |
4. | None of the above. |
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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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