Archives

Predict the shape of NH₃ and PCl₃

The shape of NH3 and PCl3 are described below Ammonia is a colourless gas with the chemical formula NH3. It comprises of atoms hydrogen and... View Article

Ethylene glycol (molar mass = 62 g mol¯1) is a common automobile antifreeze. calculate the freezing point of a solution containing 12.4g of this substance in 100 g of water. would it be advisable to keep this substance in the car radiator during summer? given : kf for water = 1.86k kg/mol kb for water = 0.512k kg/mol

Depression in any solute is known as the colligative property.Here, ΔTf = kf*m m = molality which is equal to moles of solute per kg solventMoles... View Article

What is the reaction involved when aniline is converted into phenyl isocyanide

Aniline can be converted into phenyl isocyanide by heating with Chloroform in the presence of KOHPh-NH2 + CHCl3 + KOH --> Ph-NC +KCl + H2OThis is... View Article

What is meant by tincture of iodine? Why is it used for?

A tincture of iodine, iodine tincture, or weak iodine solution is an antiseptic. It is generally 2 to 7% elemental iodine, along with potassium... View Article

Differentiate between physical and chemical adsorption?

Answer: Adsorption is a process that involves the accumulation of a substance in molecular species in higher concentrations on the surface. If... View Article

Give the reaction when sodium peroxide dissolved in water

The reaction when sodium peroxide dissolves in water is given byNa2O2 + 2H2O --> 2NaOH +H2O2Two products are formed Sodium Hydroxide and Hydrogen... View Article

How many moles of Mg₃(PO₄)₂, will contain 0.25 mole of oxygen atoms?

We have to determine the number of moles of Mg3(PO4)2 Solution 1 mole of Mg3(PO4)2 (molecule) contains: 3 moles of Mg atoms 2 moles of P... View Article

Is that possible to have a zero activation energy in a reaction? Explain why?

First will know the definition if the activation energy. Activation energy is defined as the minimum amount of extra energy required by a... View Article

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 that exist between a particular... View Article

Why gelatin is generally added to ice cream?

Gelatin is a colourless flavourless foodstuff derived from collagenGelatin acts as an emulsifier and generally, it is used to make the ice cream... 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 product. Phosphorous acid which is also called... 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, it combines with oxygen to form... 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. Sulphur oxidation state is +6 in both S2O8... 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 colour, or... 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 substance that ionizes in water to give... 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 CO2 which is 44g of CO2 2). 1 mole of carbon is burnt... 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 photonsET = E1 + E2 +... View Article

M	T	W	T	F	S	S
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30