Compound (A) is -
1. | A linear silicone | 2. | A chlorosilane |
3. | A linear silane | 4. | A network silane |
This reaction is made to proceed in forward direction by -
1. Addition of Cis- 1,2 diol
2. Addition of borax
3. Addition of trans 1,2- diol
4. Addition of
An Aqueous solution of borax reacts with 2 moles of acid due to -
1. Formation of 2 moles of B(OH)3 only
2. Formation of 2 moles of [B(OH)4]- only
3. Formation of 1 mole each of B(OH)3 and [B(OH)4]-
4. Formation of 2 moles each of [B(OH)4]- and B(OH)3, only [B(OH)4]- reacts with an acid
Aluminium becomes passive in nitric acid because it-
1. Is a noble metal
2. Forms a thin film of oxide
3. Has a positive reduction potential
4. None of the above
Chemically thermite is -
1. Fe and Al
2. Ferric oxide and aluminium powder
3. Barium peroxide and magnesium powder
4. Cu and aluminium
Borax bead test is responded by:
1. Divalent metals
2. Heavy metals
3. Light metals
4. Metal which forms coloured metaborates
The incorrect statement among the following is -
1. is amphoteric
2. is more stable than
3. is weakly acidic
4. GeCl4 + 2HCl ⇄ H2[GeCl6]
Silicon carbide is used as:
1. | Dehydrating agent | 2. | Abrasive |
3. | Solvent | 4. | Catalyst |
on complete hydrolysis forms:
1.
2.
3.
4. None of the above.
The percentage of lead in a lead pencil is-
1. 20
2. 0
3. 80
4. 70