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प्रश्न
Write the value of:
the standard temperature in:
(i) °C
(ii) K
उत्तर
(i) 0°C
(ii) 273 K
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संबंधित प्रश्न
Copper sulphate solution reacts with sodium hydroxide solution to form a precipitate of copper hydroxide according to the equation :
2NaOH + CuSO4 → Na2SO4 + Cu (OH)2 ↓
(i) What mass of copper hydroxide is precipitated by using 200 gm of sodium hydroxide?
[H = 1, O = 16, Na = 23, S = 32, Cu = 64]
(ii) What is the colour of the precipitate formed?
Copper sulphate solution reacts with sodium hydroxide solution to form a precipitate of copper hydroxide according to the equation :
2 NaOH +CuSO4 Na2SO Cu (OH)2
What is the colour of the precipitate formed?
Fill in the blank
Mass of 22.4 litre of a gas at STP is __________.
Calculate the volume of air at STP, required to convert 300 mL of sulphur dioxide to sulphur trioxide. Air contains 21% of oxygen by volume.
(NH4)2Cr2O7 → N2 + Cr2O3 +4H2O.
What volume of nitrogen at STP, will be evolved when 63g of ammonium dichromate is decomposed?
(H= 1, N = 14, 0 = 16, Cr = 52)
Concentrated nitric acid oxidizes phosphorous to phosphoric acid according to the following equation :
P + 5HNO3 → H3PO4 + H2O + 5NO2
What will be the volume of steam at the same time measured at 760mm of Hg pressure and 273°C? [H=1, N=14, O=16, P=31]
The gases hydrogen, oxygen, carbon dioxide, sulphur dioxide and chlorine are arranged in order of their increasing relative molecular mass. Given 8 g of each gas at STP, which gas will contain the least number of molecules and which gas the
most?
The equations given below relate to the manufacture of sodium carbonate (Molecular weight of Na2CO3 = 106).
- \[\ce{NaCl + NH3 + CO2 + H2O -> NaHCO3 + NH4Cl}\]
- \[\ce{2NaHCO3 -> Na2CO3 + H2O + CO2}\]
Equations (1) and (2) are based on the production of 21.2 g of sodium carbonate.
- What mass of sodium hydrogen carbonate must be heated to give 21.2 g of sodium carbonate?
- To produce the mass of sodium hydrogen carbonate calculated in (a), what volume of carbon dioxide, measured at STP, would be required?
State your observation of the following case:
When moist starch iodide paper is introduced into chlorine gas.
How much volume will be occupied by 2 g of dry oxygen at 27°C and 740 mm pressure?
