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Ask QuestionPosted by Niraj Kumar 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Elevation of boiling point
- Increase in temperature increases the vapour pressure of a
- A liquid boils at atemperature where the vapour pressure is equal to the atmospheric
- Vapourpressure of the solvent decreases in the presence of non-volatile solute.
- The boilingpoint of a solution is always higher than that ofthe boiling point of the pure solvent in which thesolution is prepared as.
- The elevation ofboiling point also depends on the number ofsolute molecules rather than their nature.
- The increase in the boiling point = ΔTb = Tb – Tb0. This is known as elevation of boiling point.
Tb0 = boiling point of pure solvent
Tb0 = boiling point of solution
Posted by Nisha Yadav 5 years, 5 months ago
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Posted by Ankita ?? Arpita☺️ 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
Copper
Malachite is a green copper carbonate hydroxide mineral with a chemical composition of Cu2(CO3)(OH)2. It was one of the first ores used to produce copper metal. It is of minor importance today as an ore of copper because it is usually found in small quantities and can be sold for higher prices for other types of use.
Posted by Pradeep Solanki 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
Since, atoms of Y forms CCP (cubic close packing) which is analogous to FCC (face centered cubic)
So, effective number of atoms of Y in lattice =4
Number of octahedral voids = Number of atoms forming CCP =4
So, effective number of atoms of X in the lattice =4
Now, X:Y⇒X:Y
4:4 1:1
So, the formula of the compound is XY
Posted by Swapna Shri 5 years, 5 months ago
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Mishti ???? 5 years, 5 months ago
Gaurav Seth 5 years, 5 months ago
Truly speaking p block is a vast chapter , full of reactions and different compounds. But if we arrange the things in a proper way , it's the easiest chapter ever. What I did was group the things together . I took large white sheets and arranged all the electronic configurations, chemical properties, physical properties, oxoacids , allotropes of Group 15 to 18 groupwise. On another sheets I noted down the chemical properties and reactions of different elements of each group like- Sulphur dioxide, Phosphine etc… This arrangement made the chapter easier for me .
Posted by Sreenath R Kurup 5 years, 5 months ago
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Posted by Jass . 5 years, 5 months ago
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Bhavya Sachdeva 5 years, 5 months ago
Posted by Keerthi Keerthi 5 years, 5 months ago
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Posted by Digvijaysingh Charan 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
| (i) Tetra phosphorus decoxide (P4O10) | Molecular |
| (ii) Ammonium phosphate (NH4)3PO4 | Ionic |
| (iii) SiC | Network (covalent) |
| (iv) I2 | Molecular |
| (v) P4 | Molecular |
| (vi) Plastic. | Amorphous |
| (vii) Graphite | Network (covalent) |
| (viii) Brass | Metallic |
| (ix) Rb | Metallic |
| (x) LiBr | Ionic |
| (xi) Si | Network (covalent) |
Posted by Gracy Pamai 5 years, 5 months ago
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Sia ? 4 years, 8 months ago
Posted by Gracy Pamai 5 years, 5 months ago
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Posted by Pooja Dhariwal 5 years, 5 months ago
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Rishab Jain 5 years, 5 months ago
Insha Khalid 5 years, 5 months ago
Posted by Preeti Yadav 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Fluorine is more electronegative than chlorine, therefore, it can attract a shared pair of electron more easily and strongly than chlorine.
Thus, it can easily accept the pair of electrons and undergoes reduction. Thus it is a strong oxidizing agent than chlorine.
Posted by Nitish Chauhan 5 years, 5 months ago
- 3 answers
Sahil Ateeque Khan 5 years, 5 months ago
Adil Abbas 5 years, 5 months ago
Gaurav Seth 5 years, 5 months ago
In ionic compounds, electricity is conducted by ions. In solid state, ions are held together by strong electrostatic forces and are not free to move about within the solid. Hence, in molten state or in solution form, the ions are free to move and can conduct electricity.
Posted by Ray Stiles 5 years, 5 months ago
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Posted by Lil Bun 5 years, 5 months ago
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Prateeth N 5 years, 5 months ago
Posted by Avinash Prasad 5 years, 5 months ago
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Posted by Kritika Parashar 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
- On a large scale, ammonia is manufactured by Haber’s process.
- The optimum conditions for the production of ammonia are a pressure of 200 × 105 Pa (about 200 atm), a temperature of ~ 700 K and the use of a catalyst such as iron oxide with small amounts of K2O and Al2O3 to increase the rate of attainment of equilibrium.
Posted by Vishal Kumar 5 years, 5 months ago
- 1 answers
Gaurav Seth 5 years, 5 months ago
The reaction is
Here k = 2.5 × 10-4 M s-1
The order of the reaction is zero i.e.,
Rate = k [Reactant]o
Rate = 2.5 × 10-4 × 1 = 2.5 
10-4 mol L-1 S-1
The rate of formation of N2 = 2.5 10-4 mol L-1 S-1
Therefore, rate of formation of H2 = 7.5 × 10-4 mol L-1 S-1
Posted by Avula Mastan 5 years, 5 months ago
- 1 answers
Gaurav Seth 5 years, 5 months ago
Volume of H2SO4 (V1) = 30 ml)
Diluted volume of H2SO4 (V2) = 500 ml
Number of moles present in 1000 mL of 0.5 M H2SO4 = 0.5 mol
Initial molarity M1= 0.5 M
We have to find M2 (molarity of 500 ml solution)
M2V2 = M1V1
M2 × 500 = 0.5 × 30
M2 = 15/ 500 = 0.03 M
Posted by Devil ? 5 years, 5 months ago
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Gaurav Bagga 5 years, 5 months ago
Posted by Lenin Nm 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
- In 1880 van’t Hoff introduced a factor i and was named as the van’t Hoff factor.
- The van’t Hoff factor account for the degree of dissociation or association.
- The van’t Hoff factor i can be defined as the ratio of Normal molar mass to the abnormal molar mass. Mathematically,
Posted by Md Fardeen 5 years, 5 months ago
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Shraddha Kansal 5 years, 5 months ago
Posted by Miss Sanathoi 5 years, 5 months ago
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