What is the colour of Aluminium Sulphate when it is added to water?
Aluminium sulphate react with water to produce aluminium hydroxide and sulphuric acid. Aluminium sulphate is White coloured and when hydrolyses... View Article
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What is collodion?
Collodion is a syrupy solution which contains nitrocellulose along with a mixture of ether and alcohol. There are two basic... View Article
What is meant by non-wettability of the mineral particles?
The non – wettability is non -mixing of solute with solvent. For example : A drop of water on paraffin... View Article
Who were Sans Culottes?
Sans-culottes, literally means ‘those without knee breeches’. They were Jacobins who wore particular kind of dress to proclaim the end of... View Article
What are polyatomic ions? Give examples.
Answer: Polyatomic ions are ions that contain more than one atom. Polyatomic ions are created when a number of atoms... View Article
The vertical movement of air is called a) Wind b) Storm c) Air current d) drift.
The vertical movement of air is called air current. Temperature differences can cause air currents because warmer air is less... View Article
What is the wavelength of Vibgyor?
VIBGYOR (Violet color, Indigo color, Blue, color, Green color, Yellow color, Orange color & red color). Violet – 4000 Å... View Article
Find the sum of 1st 30 natural numbers?
Natural numbers are part of the number system that comprises all the positive integers from 1 to infinity and are... View Article
What is Bredigs arc method?
Bredigs arc method is applied to obtain colloidal sols of metals like gold, silver and platinum. An electric arc is... View Article
Why combustion is an oxidation reaction?
Combustion is always carried out in presence of oxygen or air. Combustion is a type of oxidation . In a... View Article
Write the names and formulas of 10 salts.
Salts are ionic compounds that contain two groups of positively charged ions and negatively charged ions. A salt is defined... View Article
Silver nitrate solution is used to study (a) endoplasmic reticulum (b) Golgi apparatus (c) nucleus (d) mitochondria
Silver nitrate solution is used to study (b) Golgi apparatus. The Golgi apparatus is an organelle in eukaryotic cells. It... View Article
Nerve cell does not contain (a) axon (b) nerve endings (c) tendons (d) dendrites
The nerve cell does not contain tendons. A tendon is a fibrous connective tissue that attaches muscle to bone. Tendons... View Article
Name the organelles which show the analogy written as under (a) Transporting channels of the cell (b) Powerhouse of the cell (c) Packaging and dispatching unit of the cell (d) Digestive bag of the cell (e) Storages sacs of the cell (f) Kitchen of the cell (g) Control room of the cell
a) Endoplasmic reticular is the transporting channel of the cell as it connects the cell membrane to the nuclear membrane.... View Article
A plane left 30 minutes later than the scheduled time and in order to reach the destination, 1500km away in time. It has to increase the speed by 100km/h from the usual seed. Find the usual speed?
Distance covered by the plane = 1500 km Let the usual speed be S km/hr Let the usual time taken... View Article
The domain of water is also referred to as _____
The water domain is referred to as the hydrosphere. The hydrosphere is the combined mass of water on, under, and... View Article
What will happen when grapes get fermented?
The alcohol is produced by a process called fermentation. A ripe organic grape is full of natural sugars and there... View Article
What is amphiastral spindle and anastral spindle?
Amphiastral is found in animals in which spindle has two asters, one at each pole of the spindle. Anastral is... View Article
What is the perimeter of a cylinder?
A cylinder is a three-dimensional shape with a curved surface. Thus, we can not find the perimeter for such types... View Article
The layer of air surrounding the earth, and which is a source of oxygen, is called___?
Earth’s atmosphere comprises about 78% nitrogen, 21% oxygen, and one percent other gases. Earth’s atmosphere is divided into five main... View Article
