Chemistry Past Questions and Answers

The number of grammes of potassium hydroxide in 250cm<sup style='font-size: smaller;'>3</sup> of one molar solution is?<br/>(K = 39, O = 16, H = 1)

60cm<sup style='font-size: smaller;'>3</sup> of hydrogen are sparked with 20cm<sup style='font-size: smaller;'>3</sup> of oxygen at 100°C and 1 atmosphere. The total volume of the residual gases is?

The solubility curve of a solid X (molecular mass = 160) is as show above. 1,000 cm3 of a saturated solution of X at 80°C is cooled to 40°C . The weight of X crystalized out would be

The i.u.p.A.C name for the compound

X is a crystalline salt of sodium solution of X in water turns litmus red and produces a gas which turns lime water milky when added to sodium carbonate. With barium chloride solution, X gives hydrochloric acid. X is