Name and describe briefly a method which can be helpful in separating a mixture of husk from grains. What is the principle of this method?
0 Answers
A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?
When ethyne is burnt in air, it gives a sooty flame. This is due to incomplete combustion caused by limited supply of air. However, if ethyne is burnt with oxygen,...
1 Answers 1 views
Which tissue makes up the husk of coconut?
The husk of a coconut is made up of sclerenchyma tissue.
1 Answers 1 views
Can we separate alcohol dissolved in water by using a separating funnel? If yes, then describe the procedure. If not, explain.
Hint— Water and alcohol are miscible
1 Answers 1 views
Fill up the blanks (a) The method of separating seeds of paddy from its stalks is called ___________.
(a) The method of separating seeds of paddy from its stalks is called threshing. (b) When milk, cooled after boiling, is poured onto a piece of cloth the cream (malai) is...
1 Answers 1 views
Name and describe briefly a method which can be helpful in separating a mixture of husk from grains. What is the principle of this method?
Winnowing. This method is based on the principle that the lighter particles are carried away by the wind.
1 Answers 1 views
(a) Name a terminal method to prevent pregnancy in humans. (b) Describe the procedure of the terminal method carried in human male and female.
(a) Surgical methods / Sterilisation (b) Males - Vasectomy , a small part of vas deferens is removed or tied up through a small incision on the scrotum Females - Tubectomy ,...
1 Answers 1 views
A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used.
i. Ethyne is an unsaturated hydrocarbon. On combustion in air, it produces a yellow flame with lots of black smoke. ii. Due to this incomplete combustion, heat produced is low and...
1 Answers 1 views
The turning back of light into the same medium after incident on a boundary separating two
(a) reflection of light
1 Answers 1 views
What is meant by coagulation of a colloidal solution? Describe briefly any three methods by which coagulation of lyophobic sols can be carried out.
The process of settling of colloidal particles through induced aggregation by the addition of some suitable electrolyte is known as coagulation. Three methods by which coagulation of lyophobic sols can...
1 Answers 1 views
Why solid NaCl starts separating out from a saturated solution of NaCl if HCl gas is passed through it?
HCl in the solution provides Cl ions. This increases the ionic product in NaCl and so the solid NaCl starts separating out.
1 Answers 2 views