An anion present in the chain structure silicate is -
1.
2.
3.
4.
\(\mathrm{Al}_2 \mathrm{O}_3\) reacts with-
1. | Only water | 2. | Only acids |
3. | Only alkalis | 4. | Both acids and alkalis |
can't be prepared by -
1.
2.
3.
4.
The most characteristic oxidation state for lead and tin is, respectively,:
1. +4, +2
2. +2, +4
3. +4, +4
4. +2, +2
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.
An anion that cannot be formed by Boron is -
1.
2.
3.
4.
When silicon is boiled with caustic soda solution, the gas is evolved is-
1.
2.
3.
4. None of the above
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. | \(\mathrm{SiO}^{-}\) |
A compound among the following that is not a monomer for a high molecular mass silicone polymer is-
1.
2.
3.
4.
White fumes appear around the bottle of anhydrous AlCl3. This is due to -
1. Formation of Al(OH)3
2. Dimerisation of AlCl3
3. Hydrolysis of AlCl3 gives HCl gas
4. Adsorption of moisture