Advertisements
Advertisements
Question
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
Advertisements
Solution
Chromatography is a technique that can be used to detect and identify traces of poison in the stomach of a person.
APPEARS IN
RELATED QUESTIONS
The inter-molecular force is maximum in
Fill in the blank
Liquids have a definite ______
When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?
Name a metal which is soft and a non-metal which is hard.
Name one solid, one liquid and one gaseous non-metal.
Name a metal which is yellow in colour.
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
Which of the two will scatter light : soap solution or sugar solution ? Why ?
Explain what happens when a beam of light is passed through a colloidal solution.
How will you differentiate between a suspension and a colloid ?
Which of the following can be called a suspension ?
Name the process which is used in milk dairies to separate cream from milk.
What is the general name of the process by which tea-leaves are separated from prepared tea ?
Name the process by which common salt is purified.
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
Describe a method to separate a mixture of camphor and sand.
Which one of the following scrap metal cannot be separated by magnetic separation ?
The liquid air has three components X, Y and Z whose boiling points are : –186°C, –183°C and –196°C,
respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed
up slowly :
(a) Which component will be collected from near the bottom of the fraction distillation column ? Why ?
(b) Which component will be collected from the top part of the fractional distillation column ? Why ?
(c) Which component will be collected from the middle part of the fractional distillation column ? Why ?
(d) What could the component X, Y and Z be ?
Explain the meaning of the term matter with special reference to the term ‘substance’.
A standard sheet of paper is about ______ of atoms thick
