Chemistry questions
29404 published questions with worked solutions.
- How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO_3 ? The concentrated acid is...
- The osmotic pressure of 12% solution of cane sugar at 17^ C is
- 5.5 mg of nitrogen gas dissolves in 180 g of water at 273 K and 1 atm pressure due to nitrogen gas. The mole fraction of nitrogen...
- A solution of 1.25 g of ' P ' in 50 g of water lowers freezing point by 0.3^ C . Molar mass of ' P ' is 94. K_ f( water ) = 1.86...
- Consider separate solution of 0.500 M C_2H_5OH (aq), 0.100 M Mg_3(PO_4)_2 (aq), 0.250 M KBr(aq) and 0.125 M Na_3PO_4 (aq) at 25^...
- What will be the value of molality for an aqueous solution of 10% w/w NaOH ? (Na = 23, O = 16, H = 1)
- Benzene and naphthalene form an ideal solution at room temperature. For this process, the true statement(s) is are
- Identify the mixture that shows positive deviation from Raoult's law.
- An aqueous solution freezes at -0.186^ C then elevation in boiling point is (K_b = 0.512, K_f = 1.86)
- Vapour pressure of pure water is 40 mm. If a non-volatile solute is added to it vapour pressure falls by 4 mm. Hence, molality of...
- Aluminium phosphate is 100% ionised in 0.01 molal aqueous solution. Hence, T_b / K_b is
- Concentrated nitric acid used in laboratory work is 68% nitric acid by mass in aqueous solution. What should be the molarity of...
- An antifreeze solution is prepared from 222.6 g of ethylene glycol ( C_2H_6O_2 ) and 200 g of water. If the density of the...
- The vapour pressure of water is 12.3 kPa at 300 K. Calculate the vapour pressure of 1 molal solution of a non-volatile solute in...
- Henry's law constant for the molality of methane in benzene at 298 K is 4.27 10^5 mmHg. Calculate the solubility of methane in...
- The solubility of N_2 (g) in water exposed to the atmosphere, when the partial pressure is 593 mm, is 5.3 10^ -4 M. Its...
- Nalorphene ( C_ 19 H_ 21 NO_3 ), similar to morphine, is used to combat withdrawal symptoms in narcotic users. Dose of nalorphene...
- How many gram of sucrose (mol. wt. = 342) should be dissolved in 100 g water in order to produce a solution with a 105.0^ C...
- What is the molarity of solution containing 3.2 g of NaOH (molar mass 40 g mol^ -1 ) in 250 cm^3 of water? [MHTCET 2020]
- If a centimolal aqueous solution of K_3[Fe(CN)_6] has degree of dissociation 0.78. What is the value of van't Hoff factor?...