Question
| 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. 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. Strong acid | d. Nitric acid |
| 2. Weak alkali | a. Magnesium hydroxide |
| 3. Weak acid | b. Carbonic acid |
| 4. Strong alkali | c. NaOH |
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| Column I | Column II |
| 1. Atom | a. Treatment of goitre |
| 2. Isotopes of iodine | b. Protons + Neutrons |
| 3. Atomic mass number | c. Different number of neutrons |
| 4. Isotopes | d. Electrically neutral |
| 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 |
| Column I | Column II |
| 1. Proton | a. Negatively charged |
| 2. Electron | b. Neutral |
| 3. Neutron | c. Positively charged |
| Producer | Ecosystem |
| 1. Cactus | a. Forest |
| 2. Aquatic plants | b. Creek |
| 3. Mangroves | c. Aquatic |
| 4. Pine | d. Desert |
| S. No. | A | S. No. | B |
| (i) | Kharif crops | (a) | Food for cattle |
| (ii) | Rabi crops | (b) | Urea and superphosphate |
| (iii) | Chemical fertilisers | (c) | Animal excreta, cow-dung, and plant waste |
| (iv) | Organic manure | (d) | Wheat, gram, pea |
| (e) | Paddy and maize |
| Group ‘A’ | Group ‘B’ |
| 1. Heartbeats | a. 350 ml |
| 2. RBC | b. 7.4 |
| 3. WBC | c. 37° C |
| 4. Blood donation | d. 72 per min |
| 5. Normal body temperature | e. 50 – 60 lakh/mm3 |
| 6. pH of oxygenated blood | f. 5000 – 6000 per mm3 |
| 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. William Harvey | a. Blood group AB. |
| 2. Carl Landsteiner | b. A, B, O blood group system. |
| 3. Decastello and Sturli | c. Mechanism of circulation of blood. |
| Producer | Ecosystem |
| 1. Cactus | a. Forest |
| 2. Aquatic plants | b. Creek |
| 3. Mangroves | c. Aquatic |
| 4. Pine | d. Desert |