Two students X and Y report the mass of the same substances as 7.0 g 7.00 g respectively. Which one of the student is more accurate?

Solution exhibit certain colligative properties such as elevation in boiling point, depression in freezing point , osmotic pressure. 10g of an organic substance is dissolved in two litres of water at 280 K. Find out the molar mass of the substance if osmotic pressure of the solution id 0.6 atmospheres

In an examination, a question paper consists of 12 questions divided into two parts ie, part I and part II, containing 5 and 7 questions respectively. A student is required to attempt 8 questions in all, selecting at least 3 from each part. In how many ways can the student select the questions?

7.38 g of a sample of a metal oxide is quantitatively reduced to 6.84 g of pure metal. If the specific heat of the metal is 0.0332 cal/g, calculate the valency and the accurate atomic weight of the metal.

Let f(x) be differentiable function and g(x) be twice differentiable function. Zeros of f(x), g'(x) be a, b, respectively, (a lt b) . Show that there exists at least one root of equation f'(x) g'(x) + f(x) g''(x) = "0 on" (a, b) .