Chemistry questions
29404 published questions with worked solutions.
- The number of moles of oxygen in one litre of air containing 21% oxygen by volume, in standard conditions, is
- If 250 mL of a solution contains 24.5 g H_2SO_4 , the molarity and normality respectively are:
- If 20 g of CaCO_3 is treated with 100 mL of 20% HCl solution, the amount of CO_2 produced is
- When 100 g of ethylene polymerizes to polyethylene according to the equation, n CH_2 = CH_2 (CH_2 - CH_2) _n The weight of...Not in JEE Main or NEET syllabus
- 5.85 g of NaCl dissolved in H_2O and solution is made upto 500 mL. The molarity is:
- Weight of H_2O in 1000 kg CuSO_4 5H_2O is:
- The volume of oxygen required for complete oxidation of 2.0 litre methane at NTP is:
- Number of g-atom of S present in 49 g H_2SO_4 are:
- On adding 20 mL of 0.1 N NaOH solution to 10 mL of 0.1 N HCl, the resulting solution will:
- How many g of glucose be dissolved to make one litre solution of 10% (wt./vol.) glucose?
- A solution contains one mole of alcohol and four moles of water. What are the mole fractions of water and alcohol?
- Consider the following data: Element — Atomic weight A — 12 B — 35.5 A and B combine to form a new substance X. If four moles of...
- 0.5 mole of H_2SO_4 is mixed with 0.2 mole of Ca(OH)_2 . The maximum number of mole of CaSO_4 formed is:
- 14 g of element X combine with 16 g of oxygen. On the basis of this information, which of the followings is a correct statement?
- Volume of 0.1 M NaOH needed for the neutralisation of 20 mL of 0.05 M oxalic acid is:
- x g of Ag was dissolved in HNO_3 and the solution was treated with excess of NaCl when 2.87 g of AgCl was precipitated. The value...
- Number of mole of 1 m^3 gas at NTP are:
- The molarity of pure water is:
- In a gaseous reaction of the type aA + bB cC + dD, which is wrong?
- A mixture containing 100 g H_2 and 100 g O_2 is ignited so that water is formed according to the reaction, 2 H_2 + O_2 2 H_2O ;...