Home
Class 11
CHEMISTRY
100 g sample of clay (containing 19% H(2...

`100 g` sample of clay (containing 19% `H_(2)O`, 40% silica, and inert inpurities as rest) is partically dried so as to contains 10% `H_(2) O`.
Which of the following `is//are` correct statements (s) ?

A

The percentage of silica in it is 44.4%

B

The mas of partically dried clay is `90.0 g`.

C

The precentage of inert impurity in it is 45.6%

D

The mass of water evaporated is `10.0 g`

Text Solution

Verified by Experts

The correct Answer is:
A, C
`underset({:(%"in original clay"implies),(%"after partial drying"implies):})( ) underset({:(40),(a):})("Silica") underset({:(19),(10):})(H_(2)O) underset({:(100 - (40 + 19) = 41),(100 - (a + 10) = 90 - a):})("Impurities)`
On heating, only water evaporates from clay, whereas silica and impurities are left as it is. Therefore, % ratio of silica and impurities remains unchanged, i.e.,
`(40)/(a) = (41)/(90 - a), :. a = 44.4%`
% of mipurities after partial drying `= (19 - 10) = 9 g`
`= 45.6%`
Mass of `H_(2) O` evaporated `= (19 - 10) = 9 g`
Promotional Banner

Similar Questions

Explore conceptually related problems

Which of the following statement is not true about H_(2)O and D_(2)O

At constant P and T which of the following statement is correct for, C (s) + O_(2)(g) rarr CO_(2) (g)

A mixture of NaCl and K_(2)Cr_(2)O_(7) is heated with conc. H_(2)SO_(4) ,deep red vapours and formed .Which of the following statements is false?

Complete the following equations: CaO(s)+H_2O(g)rarr

200 tons of Fe_2O_3 containing 40% imurities will give iron by reduction with H_2 equal to :

The simplest formula of a compound containing 32.5% K, 0.839% H, 26.7% S and 39.9% O is

Calculate the molar mass of water if it contains 50% heavy water (D_(2)O) .

Igniting MnO_(2) in air converts it quantitatively to Mn_(3)O_(4) . A sample of pyrolusite is of the following composition: MnO_(2) = 80% , SiO_(2) and other inert constituents = 15%, and rest bearing H_(2) O . The sample is ignited to constant weight. What is the percent of Mn in the ingnited sample?

The equilibrium SO_(2)Cl_(2)(g) hArr SO_(2)(g)+Cl_(2)(g) is attained at 25^(@)C in a closed container and an inert gas helium is introduced. Which of the following statements is correct ?