Question
Match the column A with column B.


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| Sample | pH |
| (i) Oranges | (a) 8 |
| (ii) Grapes | (b) 7 |
| (iii) Pure water | (c) 3.5 |
| (iv) Egg white | (d) 4 |
| 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 |
| 1. Deuterium | (a) |
| 2. Protium | (b) |
| 3. Tritium | (c) |
| 4. α – decay | (d) |
| 5. β – decay | (e) |
| i. Solubility of $KNO _3$ | (a) decreases with increase in temperature |
| ii. The solubility of CaO | (b) increases with increase in pressure |
| iii. The solubility of oxygen | (c) increases with increase in temperature |
| iv. Solubility of $CO _2$ | (d) more in cold water |
| (i) $S _{( g )}+ O _{2( g )} \rightarrow SO _{2( g )}$ | (a) Electrolytic decomposition reaction |
| (ii) $2 NaCl _{( ag )} \rightrightarrows 2 Na ( s )+ Cl _{2( g )}$ | (b) Combination reaction |
| (iii) $2 AgBr _{( s )} \rightrightarrows 2 Ag ( s )+{\overline{ Br _2( g )}}$ | (c) Single displacement reaction |
| (iv) $Zn _{( s )}+2 HCl _{( aq )} \rightrightarrows ZnCl _{2( aq )}+ H _{2( g )}$ | (d) Photo decomposition reaction |
| i. $NH _3, CH _4$ | (a) Polyatomic molecule |
| ii. $O _2, N_2$ | (b) Monoatomic molecule |
| iii. He, Ne | (c) Heteroatomic molecule |
| iv. Sulphur | (d) Diatomic molecule |
| i. $H _2 O$ | (a) 16 |
| ii. $CO _2$ | (b) 18 |
| iii. $C _6 H _{12} O _6$ | (c) 44 |
| iv. $CH _4$ | (d) 180 |
| 1. Heat | (a) Joule |
| 2. Thermometer | (b) Heating |
| 3. The SI unit of heat | (c) Temperature |
| 4. Cool a cup of coffee, adding cold milk | (d) Energy |
| 5. gain by heat by a body | (e) thermal equilibrium |