| Column 1 | Column 2 | Column 3 |
| 1. Pressure | Mass/volume | Specific gravity |
| 2. Density | Force/area | Decreases with increase in height above the sea level |
| 3. Atmospheric pressure | No unit | Useful to determine the purity of a substance |
| 4. Relative density | The pascal | Decreases with increase in area |
| Column 1 | Column 2 | Column 3 |
| 1. Pressure | Force/area | Decreases with increase in area |
| 2. Density | Mass/volume | Useful to determine the purity of a substance |
| 3. Atmospheric pressure | The pascal | Decreases with increase in height above the sea level |
| 4. Relative density | No unit | Specific gravity |
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| Column A | Column B |
| 1. Silver | a. Copper + tin |
| 2. Mercury | b. Medicines |
| 3. Platinum | c. Thermometer |
| 4. Brass | d. Catalyst |
| 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 |
| Living organism | Group |
| 1. Clostridium titani | (a) Heterotrophic Protista |
| 2. Paramoecium | (b) Fungi |
| 3. Chlamydomonas | (c) Bacteria belonging to Monera |
| 4. Baker’s yeast | (d) Algae |
| (e) Virus |
| Column I | Column II |
| 1. Sea water | a. Solid in solid |
| 2. Vinegar | b. Solid in liquid |
| 3. Air | c. Liquid in liquid |
| 4. Bronze | d. Gas in liquid |
| 5. Chlorinated water | e. Gas in gas |
| Column A | Column B |
| 1. Borosilicate glass | a. Oxide of specific metal. |
| 2. Alkali silicate glass | b. Sand, soda, limestone, barium oxide and boron. |
| 3. Lead glass | c. Sand and soda. |
| 4. Optical glass | d. Sand, soda, limestone and lead oxide. |
| 5. Coloured glass | e. Sand, soda, boric acid and aluminium oxide. |
| Column I | Column II |
| 1. Alpha particles | a. Inert element |
| 2. Uranium-235 | b. Negatively charged particles |
| 3. Helium | c. Positively charged particles |
| 4. Isotopes | d. Krypton – 92, Barium 141 |
| e. U-233, Th-232 | |
| f. ${ }^{12} C ,{ }^{13} C { }^{14} C$ |
| Column I | Column II |
| 1. Thomson | a. Well defined orbits |
| 2. Rutherford | b. Neutron |
| 3. Chadwick | c. Scattering experiment |
| 4. Bohr | d. Electron |
| Bacterial diseases | Bacteria |
| 1. Typhoid | (a) Mycobacterium tuberculi |
| 2. Cholera | (b) Bacillus |
| 3. Diarrhoea | (c) Vibrio choleri |
| 4. Tuberculosis | (d) Salmonella typhi |
| 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 |
| Column ‘A’ | Column ‘B’ |
| 1. Red tomato | a. Chlorophyll |
| 2. Green leaf | b. Carotene |
| 3. Carrot | c. Anthocyanin |
| 4. Violet | d. Lycopene |