| 141. | Which of the following metals does not give hydrogen gas on the action of dilute acid of salt |
A. Al | |
B. Cu | |
C. Fe | |
D. Zn |
| 142. | Which gas is obtained when steam is passed over red hot iron? |
A. oxygen | |
B. producer gas | |
C. Hydrogen | |
D. water gas |
| 143. | Hydrogen is obtained by burning in air |
A. water | |
B. hydrogen chloride | |
C. alcohol | |
D. air |
| 144. | Which gas is used in the manufacture of vanaspati ghee? |
A. nitrogen | |
B. carbon dioxide | |
C. Hydrogen | |
D. Neon |
| 145. | By which process can cooking oil be converted into ‘Vaspati Ghee’? |
A. by hydrogenation | |
B. by crystallization | |
C. by distillation | |
D. by catabolism |
| 146. | Which of the following will absorb large chunks of hydrogen |
A. colloidal solution of palladium | |
B. colloidal ferric hydroxide | |
C. refined split platinum | |
D. refined split nickel |
| 147. | Metals like palladium and platinum absorb a large amount of hydrogen under special conditions, called hydrogen absorbed by the metal. |
A. absorbed hydrogen | |
B. captured hydrogen | |
C. active hydrogen | |
D. atomic hydrogen |
| 148. | Water is an excellent solvent because its molecules |
A. are lightweight | |
B. is indifferent | |
C. is highly polar | |
D. is nonpolar |
| 149. | The ratio of hydrogen and oxygen in water in proportion to volume is |
A. Ratio of 1 and 8 | |
B. 2 and 1 ratio | |
C. 1 and 2 ratio | |
D. 8 to 1 ratio |
| 150. | The ratio of hydrogen to oxygen in water by weight is |
A. Ratio of 1 and 8 | |
B. 2 and 1 ratio | |
C. 1 and 2 ratio | |
D. 8 to 1 ratio |