Is wood a pure substance?
Wood is not a pure substance but a homogenous mixture because it is composed of compounds such as cellulose, hemicelluloses,... View Article
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Find n factor of Na2CO3.
The n factor of salts is defined as the number of moles of electrons exchanged (lost or gained) by one... View Article
What is the SI unit of dipole moment?
The SI unit for electric dipole moment is the coulomb-meter. The separation of charges in any system leads to dipole... View Article
What is the hybridisation in the central atom of H3O +?
The hybridization in the central atom of H30+ is sp3 and geometry is trigonal pyramidal. Hybridization depend upon the number... View Article
What is self-reduction?
The cations of the less electropositive metals like Pb, Hg, Sb and Cu may be reduced without the use of... View Article
What is upthrust? Write it’s unit.
Upthrust is also known as buoyant force. It is upward force acting on a body is partially. or fully immersed... View Article
What is the chemical formula of Calamine?
Calamine is Zinc Oxide with a small proportion of ferric oxide. It is used in lotion form to treat skin... View Article
Which of following can not be polarised(a) Radio waves(b) Ultraviolet rays(c) Infrared rays(d) Ultrasonic waves
Ultrasonic waves are longitudinal waves. Hence, it cannot be polarized because, the motion of the particles is already in one... View Article
How would the bond length vary in dicarbon species C2, C2+, C2-
Bond order is the number of Chemical bonds between a pair of atoms and indicates the stability of a bond.... View Article
Fe2O3 + 2Al → Al2O3 + 2Fe. The reaction is an example of a: (a) combination reaction. (b) double displacement reaction. (c) decomposition reaction. (d) displacement reaction.
Answer: (d) displacement reaction Displacement reaction A displacement reaction is one wherein the atom or a set of atoms is displaced... View Article
Which is called Indian Saltpeter?
Potassium nitrate is called Indian Saltpeter. This is because it is one of the nitrogen containing compounds and is very... View Article
Terrycot is a blended fibre made from ___?
Terrycot is fibre which is made by mixing two fibres . Terrycot is a blended fabric made of terylene and... View Article
Calculate the molarity of pure water if its density at room temperature is 1.0gcm.
Answer: The term molarity for a provided solution is described as the total number of moles of solute per litre... View Article
What is the atomicity of carbon dioxide and water?
Atomicity is defined as the total number of atoms that constitute a molecule. The atomicity of carbon dioxide is 3(1... View Article
What happens when sodium carbonate is added to sodium hydroxide?
When sodium carbonate is added to sodium hydroxide no characteristic reaction is formed as these both are bases. The Sodium... View Article
When copper powder is heated in a china dish the surface of the copper powder becomes coated with a black colour substance. Why has this black coloured substance formed? What is that black substance? Write the chemical equation of the reaction.
When the copper powder is heated in a china dish the copper powder surface becomes coated with black colour substance... View Article
Carbohydrates in the plants are stored in the form of a) Glycogen b) Starch c) Glucose d) Maltose
The carbohydrate group includes sugars, starch , and cellulose. Starch is the usual form in which carbohydrates are stored as... View Article
What is the equivalent weight of silver nitrate?
Silver nitrate is an inorganic compound with the chemical formula AgNO3. The equivalent weight of an element is its gram... View Article
How to calculate the valency of nitrogen?
The atomic number of Nitrogen is 7 and its electronic configuration is as follows 1s2 2s2 2p3. The last p... View Article
Why are copper wires used as connecting wires?
The resistance of a connecting wire should be always negligible. so when the wires are made up of copper, it... View Article
