Question
(a) Root tip with root hairs.
(b) Guard cell in turgid and Flacid condition.
(b) Guard cell in turgid and Flacid condition.
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| 1. Sodium silicate | (a) glow to the clothes |
| 2. Fluorescent whitening agent | (b) removal of certain stains |
| 3. Sodium perborate | (c) prevent the caking of the detergent powder |
| 4. Sodium sulphate | (d) prevents corrosion |
| i. Group 18 | (a) Main group elements |
| ii. Group 3 – 12 | (b) Noble gases |
| iii. Group 13 – 18 | (c) Halogens |
| iv. Group 17 | (d) Transition elements |
| i. 22 g of $CO _2$ | (a) 2 moles |
| ii. 18 g of $H _2 O$ | (b) 4 moles |
| iii. 360 g of Glucose | (c) 0.5 mole |
| iv. 64 g of $CH _4$ | (d) 1 mole |
| i. Copper | (a) Lustrous greyish white metal |
| ii. Iron | (b) Cn 112 |
| iii. Aluminium | (c) Reddish-brown metal |
| iv. Copernicium | (d) Silvery white metal |
| 1. Neuroglia | (a) Conduct nerve impulses |
| 2. Electrical impulse | (b) Connects the lobe of the cerebellum |
| 3. Pons | (c) Cerebrospinal fluid |
| 4. Brain | (d) Do not conduct nerve impulses |
| 5. Dendrites | (e) Information from the receptor |
| Elements | Electronegative value |
| i. F | (a) 2.5 |
| ii. Cl | (b) 2.8 |
| iii. Br | (c) 3.0 |
| iv. I | (d) 4.0 |

| 1. Waldeyar | (a) Role of chromosome in heredity |
| 2. James Watson and Crick | (b) Father of genetics |
| 3. Hugo de Vries | (c) Down’s syndrome |
| 4. Langdon Down | (d) Chromosomes |
| 5. T.H Morgan | (e) Mutation |
| 6. Gregor Johan Mendel | (f) Model of DNA |
