Which loses weight on exposure to the atmosphere ?
1. Concentrated H2SO4
2. Solid NaOH
3. A saturated solution of CO2
4. Anhydrous sodium carbonate
The correct order of ease of hydrolysis is :
1. CCl4 < SiCl4 < PCl5 < AlCl3
2. AlCl3 < CCl4 < PCl5 < SiCl4
3. CCl4 < AlCl3 < PCl5 < SiCl4
4. CCl4 < AlCl3 < SiCl4 < PCl5
Carbon dioxide is a gas but silica is a solid because:
1. carbon dioxide is composed of discrete covalent molecules whereas silica has continuous
tetrahedral structure
2. molecules are lighter than molecules
3. is more acidic than
4. melting point of silica is very high
The greatest percentage of is in:
1. coal gas
2. producer gas
3. water gas
4. oil gas
Butter of tin is:
1.
2.
3.
4.
CO2 and N2 are non-supporters of combustion. However, for putting out fires CO2 is preferred over N2 because CO2:
1. Does not burn.
2. Forms non-combustible products with burning substances.
3. Is denser than nitrogen.
4. Is a more reactive gas.
When sodium or potassium oxide is heated in a current of , we get:
1. sodium formate
2. sodium oxalate
3. sodium acetate
4. sodium carbonate
Which can be directly brought into gaseous state from solid state?
(1) CO
(2) Solid
(3)
(4)
Under hydrolytic conditions, the compounds used for the preparation of the linear polymer and for chain termination, respectively, are
1.
2.
3.
4.
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 |