Chemistry questions
29404 published questions with worked solutions.
- The gram molecular weight of hydrogen peroxide is 34. What is the unit of gram molecular weight?
- The weight of a substance that displaces 22.4 litre air at NTP is:
- 1.520 g of the hydroxide of a metal on ignition gave 0.995 g of oxide. The equivalent weight of metal is
- 510 mg of a liquid on vaporization in Victor meyer's apparatus displaces 67.2 cm^3 of air at (STP). The molecular weight of the...
- 5.6 litre of oxygen at NTP is equivalent to:
- The formula weight of Al_2(SO_4)_3 is 342. A solution containing 342 g of Al_2(SO_4)_3 in :
- If 0.5 mole of BaCl_2 is mixed with 0.2 mole of Na_3PO_4 the maximum number of mole of Ba_3(PO_4)_2 that can be formed is:
- The number of mole present in 2 litre of 0.5 M NaOH is:
- If 250 mL of a solution contains 2.7 g of H_3PO_4 , the normality of the solution is:
- Vapour density of a volatile substance is 4 ( CH_4 = 1). Its molecular weight would be:
- How many atoms are contained in a mole of Ca(OH)_2 ?
- The term standard solution is used for the solutions whose:
- The mole fraction of oxygen in a mixture of 7 g of nitrogen and 8 g of oxygen is:
- A molar solution represents a solution of molarity equal to:
- The number of Cl^- and Ca^ 2+ ions in 222 g CaCl_2 are :
- If one mole of ethanol ( C_2H_5OH ) completely burns to carbon dioxide and water, the weight of carbon dioxide formed is about:
- 1000 g aqueous solution of CaCO_3 contains 10 g of calcium carbonate. Concentration of solution is:
- The minimum quantity of H_2S needed to precipitate 63.5 g of Cu^ 2+ will be nearly:
- A gas is found to have the formula (CO) _x. Its VD is 70. The value of x must be:
- The molarity of 2 N H_2SO_4 is: