Nidhi took two China dishes and marked them as I and II.
In China dish I, she mixed iron filings and sulphur powder. In China dish II, she mixed iron filings and dilute hydrochloric acid. What were her observations in both the dishes?
Important Questions on Is Matter Around Us Pure
Which of the following statements is/are incorrect?
I. Centrifugation method can be used to separate butter from cream.
II. Coloured component of blue ink can be separated by evaporation.
III. Chromatography can be used to detect drugs in blood.
IV. Camphor can be separated from salt by crystallisation.
The boiling points of few gases found in the air are given below:
| Element | Krypton | Neon | Nitrogen | Oxygen |
| Boiling point |
If the liquid mixture is fractionally distilled, the order of gases distilling out is:
Sheela heated a mixture of iodine and common salt by keeping an inverted funnel on it. After some time, she observed that:
Geetika poured of salt into of water in a beaker. She stirred the water to dissolve the salt completely. Then she heated the solution until it was reduced to half. How many grams of salt can be recovered from the remaining solution?
The given chromatogram was obtained for proteins extracted from soymilk.
The components present in the protein extract are:
Read the given passage carefully and answer the following questions.
The constituents of a heterogeneous mixture are X, Y and Z. If a mixture containing X and Y is taken, X can be separated using magnetic separation from Y. If a mixture containing Y and Z is taken, the two can be separated using the evaporation method.
The different states of X, Y and Z respectively are:
Read the given passage carefully and answer the following questions.
The constituents of a heterogeneous mixture are X, Y and Z. If a mixture containing X and Y is taken, X can be separated using magnetic separation from Y. If a mixture containing Y and Z is taken, the two can be separated using the evaporation method.
Which of the following identifies X, Y and Z correctly?
