MCQOPTIONS
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MCQOPTIONS
This section includes 621 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge (GK) knowledge and support exam preparation. Choose a topic below to get started.
| 601. |
The number of electrons in the outer shell of the most stable or inert atoms is |
| A. | 1 |
| B. | 5 |
| C. | 3 |
| D. | 8 |
| Answer» E. | |
| 602. |
A complex compound in which the oxidation number of a metal is zero is - |
| A. | K4 [Fe (CN)6] |
| B. | K3 [Fe (CN)6] |
| C. | [Ni (CO)4] |
| D. | [Pl (NH3)4]Cl2 |
| Answer» D. [Pl (NH3)4]Cl2 | |
| 603. |
The first organic compound synthesized in the laboratory was - |
| A. | Urea |
| B. | Uric acid |
| C. | Lactic acid |
| D. | Glucose |
| Answer» B. Uric acid | |
| 604. |
The percentage of Nitrogen in Air is - |
| A. | 0.94 |
| B. | 0.03 |
| C. | 78.03 |
| D. | 85.02 |
| Answer» D. 85.02 | |
| 605. |
The percentage of nitrogen present in ammonium sulphate is |
| A. | 27% |
| B. | 25% |
| C. | 30.5% |
| D. | 18% |
| Answer» B. 25% | |
| 606. |
Helium is added to the oxygen supply of deep sea divers because it is - |
| A. | less poisonous than nitrogen |
| B. | (2) Lighter than nitrogen |
| C. | Readily miscible with oxygen |
| D. | less soluble in blood than nitrogen at high pressure |
| Answer» E. | |
| 607. |
The inert gas used as beacon light is - |
| A. | Kr |
| B. | Ar |
| C. | He |
| D. | Ne |
| Answer» E. | |
| 608. |
Which among the following is a covalent compound? |
| A. | Calcium chloride |
| B. | Magnesium fluoride |
| C. | Sodium chloride |
| D. | Carbon tetrachloride |
| Answer» E. | |
| 609. |
Percentage of lead in lead pencils is |
| A. | "0" |
| B. | 31-66 |
| C. | 40 |
| D. | 80 |
| Answer» B. 31-66 | |
| 610. |
The gas used to dilute oxygen for breathing by deep sea divers is- |
| A. | Neon |
| B. | Argon |
| C. | Nitrogen |
| D. | Helium |
| Answer» E. | |
| 611. |
The amount of oxygen in the atmosphere remains relatively constant because it is given off by - |
| A. | Oceans |
| B. | Animals |
| C. | Rocks |
| D. | Plants |
| Answer» E. | |
| 612. |
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is - |
| A. | Xenon |
| B. | Krypton |
| C. | Argon |
| D. | Helium |
| Answer» E. | |
| 613. |
Of the following which one pollutes the air of a big city? |
| A. | Copper |
| B. | Chromium |
| C. | Lead |
| D. | Calcium |
| Answer» D. Calcium | |
| 614. |
The oxygen liberated during Photosynthes is comes from - |
| A. | Water |
| B. | Carbon dioxide |
| C. | Glucose |
| D. | Chlorophyll |
| Answer» B. Carbon dioxide | |
| 615. |
The pollutant responsible for ozone holes is - |
| A. | CO2 |
| B. | SO2 |
| C. | CO |
| D. | CFC |
| Answer» E. | |
| 616. |
Of the following, which one pol-lutes the air of a big City? |
| A. | Copper |
| B. | Chromium |
| C. | Lead |
| D. | Cadmium |
| Answer» D. Cadmium | |
| 617. |
The gas that usually causes explosions in coal mines is - |
| A. | Hydrogen |
| B. | Carbon monoxide |
| C. | Air |
| D. | Methane |
| Answer» E. | |
| 618. |
Which is used in preparation of dynamite? |
| A. | glycerol |
| B. | ethyl alcohol |
| C. | methyl alcohol |
| D. | glycol |
| Answer» B. ethyl alcohol | |
| 619. |
Vinegar is the trade name of - |
| A. | acetic acid |
| B. | chloroform |
| C. | carbon tetrachloride |
| D. | ethyl alcohol |
| Answer» B. chloroform | |
| 620. |
Which of the following metals causes Itai-Itai disease? |
| A. | Cadmium |
| B. | Chromium |
| C. | Cobalt |
| D. | Copper |
| Answer» B. Chromium | |
| 621. |
Acid secretion is characteristic of - |
| A. | Buccal cavity |
| B. | Stomach |
| C. | Small intestine |
| D. | Large intestine |
| Answer» C. Small intestine | |