Which of the following oxide is amphoteric in nature?
1. SnO2
2. SiO2
3. GeO2
4. CO2
Identify the correct statements from the following:
(a) | \(\mathrm{CO}_2(\mathrm{~g})\) is used as a refrigerant ice cream and frozen food. |
(b) | The structure of \(\mathrm{C}_{60} \) customs12 six carbon rings and 25 five carbon rings |
(c) | ZSM-5, a type of zeolite, is used to convert alcohol into gasoline. |
(d) | CO is a colorless and odorless gas. |
1. | (a) and (c) only | 2. | (b) and (c) only |
3. | (c) and (d) only | 4. | (a), (c) and (d) only |
1. | Both the Boron atoms are sp2 hybridised. |
2. | There are two 3-centre-2-electron bonds. |
3. | The four terminal B-H bonds are two centre two-electron bonds. |
4. | The four terminal Hydrogen atoms and the two Boron atoms lie in one plane. |
1. | Both diamond and graphite are used as dry lubricants. |
2. | Diamond and graphite have a two-dimensional network. |
3. | Diamond is covalent and graphite is ionic. |
4. | Diamond is sp³ hybridised and graphite is sp² hybridized. |
Which of the following is the correct statement?
1. Ga+ is more stable than ln+.
2. Al+ is more stable than ln+.
3. Ga+ is more stable than Al+.
4. Al+ is more stable than Ga+.
The chain length of silicones can be controlled by adding:
1. \(\mathrm{CH_3SiCl_3}\)
2. \(\mathrm{SiCl_4}\)
3. \(\mathrm{(CH_3)_2SiCl_2}\)
4. \(\mathrm{(CH_3)_3SiCl}\)
List-I (Compounds) |
List-II (Molecular formula) |
||
(a) | Borax | (i) | NaBO2+B2O3 |
(b) | Kernite | (ii) | Na2B4O7.4H2O |
(c) | Orthoboric acid | (iii) | H3BO3 |
(d) | Borax bead | (iv) | Na2B4O7.10H2O |
(a) | (b) | (c) | (d) | |
1. | (iv) | (ii) | (iii) | (i) |
2. | (ii) | (iv) | (iii) | (i) |
3. | (iii) | (i) | (iv) | (ii) |
4. | (i) | (iii) | (iv) | (ii) |
1. | H3BO3 | 2. | B2O3 |
3. | Na2B2O5 | 4. | NaB3O5 |
Match the allotropes of cabon given in List I with the respective characteristics given in List II.
List-I | List-II | ||
A. | Coke | I. | Carbon atoms are sp3 hybridised. |
B. | Diamond | II. | Used as a dry lubricant |
C. | Fullerene | III. | Used as a reducing agent |
D. | Graphite | IV. | Cage like molecules |
Options: | (A) | (B) | (C) | (D) |
1. | III | IV | I | II |
2. | II | IV | I | III |
3. | IV | I | II | III |
4. | III | I | IV | II |