Hydrogen gas is evolved..
Hydrogen gas is liberated when an acid reacts with a metal. For example, when zinc metal reacts with dil. hydrogen is evolved and salt zinc chloride is formed as: It can be tested by bringing a burning candle near the gas.
When zinc is reacted with HCl it produces zinc chloride salt and water whereas when zin carbonate is reacted with HCl, zinc chloride salt is produced along with carbon dioxide and water.
Dry HCl gas does not release H+ ions and hence, the acidic property of gas is not imparted.
Plz mark as brainlies
v² = u² + 2 a S
0² = 9.8² - 2 *9.8 * S
S = 9.8 * 9.8 / 2 * 9.8 = 4.9 meters
2) Heterogeneous - involves different states o f material. exothermic, endothermic relate to absorption or release of heat from reaction
1: metal hydrogen gas is liberated when dilute hydrochloric acid reacts with zinc
1)Chlorine and2)Carbon dioxide is liberated.
Dil. HCL does not exhibit acidic properties because of absence of hydronium ions
1)Hydrogen gas is evolved .
2) Salt,Carbon di oxide and water.
1) metal + acid⇒ + salt
2)Z n C O 3+ 2 H C l → Z n C l 2 + C O 2 + H 2 O
Dry HCl gas does not contain any hydrogen ions in it, so it does not show acidic behaviour. In fact, dry HCl gasdoes not change the colour of dry litmus paper as it has no hydrogenions [H+(aq) ions] in it.
2)Carbon dioxide gas
True, Let a = 51m, b = 37m, c = 20m
s = (a + b + c)/2 = (51 + 37 + 20)/2 = 108/2 = 54 m
∴ Area of triangular ground = root under(√s(s - a)(s - b)(s - c))
= root under√54(54 - 51)(54 - 37)(54 - 20)
= root under (√54 x 3 x 17 x 34) = 306 m2
Cost of levelling the ground = Rs
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