Question
| Column I | Column II |
| 1. Potassium dichromate | a. Complex compound |
| 2. Cyanocobalamine | b. Element |
| 3. Air | c. Compound |
| 4. Silver | d. Mixture |
| Column I | Column II |
| 1. Potassium dichromate | a. Complex compound |
| 2. Cyanocobalamine | b. Element |
| 3. Air | c. Compound |
| 4. Silver | d. Mixture |
| Column I | Column II |
| 1. Potassium dichromate | c. Compound |
| 2. Cyanocobalamine | a. Complex compound |
| 3. Air | d. Mixture |
| 4. Silver | b. Element |
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| Producer | Ecosystem |
| 1. Cactus | a. Forest |
| 2. Aquatic plants | b. Creek |
| 3. Mangroves | c. Aquatic |
| 4. Pine | d. Desert |
| Importance of the day | Date |
| 1. World Diabetes Day | (a) 7th April |
| 2. World Heart Day | (b) 14th June |
| 3. World Blood Donation Day | (c) 29th September |
| 4. World Health Day | (d) 14th November |
| Column ‘A’ | Column ‘B’ |
| 1. Water containing cobalt | a. Mental retardation |
| 2. Methane gas | b. Paralysis |
| 3. Water containing lead | c. Inflammation of lungs |
| 4. Sulphur dioxide | d. Skin cancer |
| 5. Nitrogen dioxide | e. Irritation of eyes |
| Column ‘A’ | Column ‘B’ |
| 1. Strong acid | a. Magnesium hydroxide |
| 2. Weak alkali | b. Carbonic acid |
| 3. Weak acid | c. NaOH |
| 4. Strong alkali | d. Nitric acid |
| Column ‘A’ | Column ‘B’ |
| 1. Earthquake | a. Formation of artificial water reservoir |
| 2. Tsunami | b. Wildlife lost |
| 3. Forest fire | c. Loss of coastal regions |
| 4. Landslide | d. Change in the level of groundwater-table |
| Group ‘A’ | Group ‘B’ |
| 1. Fluid | a. Higher pressure |
| 2. Blunt knife | b. Atmospheric pressure |
| 3. Sharp needle | c. Specific gravity |
| 4. Relative density | d. Lower pressure |
| 5. Hectopascal | e. Same pressure in all directions |
| Microbes | Size |
| 1. Virus | (a) 1 μm to 10 μm |
| 2. Algae | (b) 200 μm |
| 3. Protozoa | (c) 10 μm to 100μm |
| 4. Bacteria | (d) 10 nm to 100 nm |
| Bacterial diseases | Bacteria |
| 1. Typhoid | (a) Mycobacterium tuberculi |
| 2. Cholera | (b) Bacillus |
| 3. Diarrhoea | (c) Vibrio choleri |
| 4. Tuberculosis | (d) Salmonella typhi |
| Column 1 | Column II |
| 1. Milk | a. Alloy |
| 2. Lemonade | b. Colloid |
| 3. Sand and water | c. Solution |
| 4. Brass | d. Suspension |
| Column I | Column II |
| 1. Thomson | a. Well defined orbits |
| 2. Rutherford | b. Neutron |
| 3. Chadwick | c. Scattering experiment |
| 4. Bohr | d. Electron |