Is that possible to have a zero activation energy in a reaction? Explain why?
First will know the definition if the activation energy. Definition Activation energy is defined as the minimum amount of extra... View Article
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Write the balanced equation for complete hydrolysis of xef6
Hydrolysis is a common form of a chemical reaction where water is mostly used to break down the chemical bonds... View Article
Why gelatin is generally added to ice cream?
Gelatin is a colourless flavourless foodstuff derived from collagen Gelatin acts as an emulsifier and generally, it is used to... View Article
Why basicity of H3PO3 and H3PO2 are 2 and 1 respectively?
The basicity of a molecule is a measure of its ability to accept a proton (H+) to form a stable... View Article
What happens when (i) magnesium is burnt in air (ii) quick lime is heated with silica (iii) chlorine reacts with slaked lime (iv) calcium nitrate is heated?
(i) When magnesium is burnt in the air it forms magnesium oxide(MgO) When magnesium ribbon is burnt in the air,... View Article
So4 -2 —————-> (s2o8 )-2 + 2e- (ox.) how it is possible as there is no change in the oxidation state of s from sulphate ion to thionate i.e. +6 to +6
The change in oxidation is not due to the sulphur atom but due to the oxygen atom present in them.... View Article
What is Na2S2O3 and find its n-factor in a basic medium?
Na2S2O3 is the compound with the name Sodium Thiosulfate. It is typically found in its pentahydrate form which is either white in... View Article
What is the conjugate base of HCO3– and H2O ?
A base is any substance (molecules or ions) that can accept a proton to any other substance. A base is a... View Article
Calculate the amount of CO2 that could be produced when 1) 1 mole of carbon is burnt in air 2) 1 mole of carbon is burnt in 16 gram of O2 3) 2 moles of carbon is burnt in 16 gram of O2
Answer: 1). 1 mole of Carbon burnt in air C + O2 →CO2 1 mole of carbon produces 1 mole of... View Article
Give some of the diagonal relationships between beryllium and aluminium:
A diagonal relationship in S block elements exists between adjacent elements which are located in the second and third periods... View Article
What are the steps in the preparation of: (i) k2cr2o7 from chromite ore. (ii) kmno4 from pyrolusite ore.
(i)Potassium dichromate is prepared from chromate ore by 4FeCrO4 + 16NaOH +7O2 –> 8NaCrO4 + 2Fe2O3 + 8H2O Thus formed... View Article
What is radioactive sugar?
Radioactive sugar is made out of C-14 or O-16 these contain radioactive isotopes of carbon, hydrogen or oxygen. Definition- Radioactive... View Article
A gas absorbs a photon of 355 nm and emits at two wavelengths. if one of the emissions is at 680 nm, what will be next wavelength emitted?
According to the Law of conservation energy, the absorbed photon must be equal to the combines energy of two emitted... View Article
What are the nodal planes of dz^2 orbital? how can we find nodal planes?
Nodal planes are defined as the planes of zero probability region to find the electron. The number of planes is... View Article
Differentiate between wrought iron and steel
Wrought iron and steel both are widely used metals in day to day life. In construction sites, these are the... View Article
Explain the drawbacks of rutherford’s model of the atom?
Rutherford performed an experiment using alpha particle and gold foil. Rutherford’s conducted an experiment by bombarding a thin sheet of gold... View Article
Why are half-filled d orbitals more stable?
D block Elements have a general electronic configuration of (n-1)d 1-10ns 1-2. These elements can find stability in half-filled orbitals and completely filled... View Article
A solution of cuso4 is electrolysed for 10 minutes with a current of 1.5 amperes. what is the mass of copper deposited at the cathode?
The process by which ionic substances are decomposed into simpler substances when an electric current is passed through them. In... View Article
Explain with suitable examples. (i) alcosol (ii) aerosol (iii) hydrosol?
Colloids (also known as colloidal solutions or colloidal systems) are mixtures in which microscopically dispersed insoluble particles of one substance... View Article
The oxidation number of cobalt in k[co(co)4] is (i) +1 (ii) +3 (iii) –1 (iv) –3
The correct answer is (iii) -1 Solution In the above compound the oxidation number of iron can be determined as follows:... View Article
