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

Topper's Solved these Questions

  • SOME BASIC CONCEPTS AND MOLE CONCEPT

    CENGAGE CHEMISTRY|Exercise Exercises Single Correct|88 Videos

  • SOME BASIC CONCEPTS AND MOLE CONCEPT

    CENGAGE CHEMISTRY|Exercise Exercises Assertion-Reasoning|10 Videos

  • SOME BASIC CONCEPTS AND MOLE CONCEPT

    CENGAGE CHEMISTRY|Exercise Exercises Multiple Correct (Limiting Reagent)|7 Videos

  • S-BLOCK GROUP 2 - ALKALINE EARTH METALS

    CENGAGE CHEMISTRY|Exercise Ex 5.1 Objective|2 Videos

  • STATES OF MATTER

    CENGAGE CHEMISTRY|Exercise Exercises (Ture False)|25 Videos

Similar Questions

Explore conceptually related problems

A sample of clay contains 60% Silica & 15 % water. The sample is heated such that the partially dried sample contains 66% Silica. What will be % of water in partially dries sample ?

Which of the following statements is // are correct about 6.8% stregnth of H_2O_2 .

A sample of clay contains 50% silica and 10% water. The sample is partially dried by which it loses 8 gm of water. If the percentage of silica in the partially dried clay is 52, what is the percentage of water is the partially dried clay?

A hydrate of iron (III) thiocynate Fe(SCN)_(3) , was found to contain 19% H_(2)O . What is the formula of the hydrate?

In a given sample of H_(2)O_(2) each 100 mL of solution contains 68 mg of H_(2)O_(2) . The molarity of the solution is

A sample of clay was partially dried. It then contained 50% slica and 7% water. The original clay contained 12% water find the percentage of silica in the original sample

A sample of impure air contains 80% N_(2) , 10% O_(2) 5% CO_(2) and 5% Ar by volume. The average (At wt. of Ar = 40)

A sample containing 1 mol KHC_(2)O_(4).H_(2)C_(2)O_(4) is titrated with different reagent. Select correct statement.