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  • 2 answers

Kalindi Yadav 8 years, 1 month ago

The oxidation number of a free element is always 0. The oxidation number of a monatomic ion equals the charge of the ion. The oxidation number of "H" is +1, but it is -1 in when combined with less electronegative elements. The oxidation number of "O" in compounds is usually -2, but it is -1 in peroxides. The oxidation number of a Group 1 element in a compound is +1. The oxidation number of a Group 2 element in a compound is +2. The oxidation number of a Group 17 element in a binary compound is -1. The sum of the oxidation numbers of all of the atoms in a neutral compound is 0. The sum of the oxidation numbers in a polyatomic ion is equal to the charge of the ion.

Kalindi Yadav 8 years, 1 month ago

The oxidation number of a monatomic ion equals the charge of the ion. The oxidation number of H is +1, but it is -1 in when combined with less electronegative elements. The oxidation number of O in compounds is usually -2, but it is -1 in peroxides. The oxidation number of a Group 1 element in a compound is +1.
  • 1 answers

Kalindi Yadav 8 years, 1 month ago

Molality = Moles of solute / (Mass of solvent in Kg). Moles of solute =given mass of solute / molar mass. Solute is Chloroform.And solvent is water.Put the value of given mass according to your question and molar mass of chloroform= 118•5 g/mol to get the no of moles of solute(chloroform).And then calculate molality.
  • 2 answers

Kalindi Yadav 8 years, 1 month ago

The rate of reaction is the speed at which reactants are converted into products

Yuthika Yadav 8 years, 1 month ago

Rate of reaction is the rate of disapperance of reactant and the rate of appearance of products
  • 1 answers

Shivanshu Yadav 8 years, 1 month ago

mathematical factor which compensates for irregularity in the shape of an object, usually the ratio between its volume and that of a regular object of the same breadth and height. 2. the physical size and shape of a piece of computer hardware.
  • 1 answers

Kalindi Yadav 8 years, 1 month ago

Acid rain is caused by a chemical reaction that begins when compounds like sulphur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.
  • 1 answers

Sudarson Sengupta 8 years, 1 month ago

Ptc: p-toulouenesulphonylchloride
  • 1 answers

Shivi Rajput 8 years, 1 month ago

Go through NCERT page no 45
  • 1 answers

Kalindi Yadav 8 years, 1 month ago

The Arrhenius equation is a formula for the temperature dependence of reaction rates. The effect of temperature on rate is given by Arrhenius law k = A.e–E/RT K = rate constant E = Activation energy R = Gas constant T = Absolute Temp. A = Frequency factor (Arrhenius Constant)
  • 2 answers

Sudarson Sengupta 8 years, 1 month ago

No hydrogen present

Abhishek Soni 8 years, 1 month ago

Absence of active hydrogen
  • 2 answers

Abhishek Soni 8 years, 1 month ago

Part 2 page 336 lastvthird line

Astha Srivastava 8 years, 1 month ago

It is given in n.c.e.r.t.
  • 2 answers

Prerna Pahwa 8 years, 1 month ago

Command on reagents

Jin Kazama 8 years, 1 month ago

Sorry yha sub students hai
  • 1 answers

Jin Kazama 8 years, 1 month ago

it is IUPAC - International Union of Pure and Applied Chemistry not IUPASE
  • 2 answers

Ishu Chouhan 8 years, 1 month ago

Ncert ke sare questions kar lo

Ishu Chouhan 8 years, 1 month ago

Ncert ke reasoning questions pad lo
  • 1 answers

Ashwani Kumar Maurya 8 years, 1 month ago

It get disproportionate...means atom get reduce &one oxidise..
  • 4 answers

Priya Prakash S 8 years, 1 month ago

3

Aayisha Azeez 8 years, 1 month ago

In H3PO4 three P_OH groups are present so its basicity is three

Rochie Joshi 8 years, 1 month ago

3

Ashwani Kumar Maurya 8 years, 1 month ago

Tribasic..
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  • 4 answers

Priya Prakash S 8 years, 1 month ago

Chlorobenzene

Kanak Tiwari 8 years, 1 month ago

Yeah it may be

Ashwani Kumar Maurya 8 years, 1 month ago

I think chlorobenzene..

Kanak Tiwari 8 years, 1 month ago

Chlorobenzene has a resonant effect due which carbon and chlorine bond has a partially double bond character due to which the dipole movement is decreased where as in cyclohexane there is no resonance effect
  • 1 answers

Komal Diksha 8 years, 1 month ago

Due to the presence of voids in them.
  • 4 answers

Ishu Chouhan 8 years, 1 month ago

Yes ncert hi pado aap to ,be positive and best of luck?????

Rochie Joshi 8 years, 1 month ago

But read the theory completely .

Rochie Joshi 8 years, 1 month ago

Ya its sufficent yr .i asked my teacher about it . ncert have every type of questions.

Radhika Tyagi 8 years, 1 month ago

No
  • 2 answers

Tannu Pal 8 years, 1 month ago

Ammonium chloride and Zn cl in form of a paste is stored at anode

Ashwani Kumar Maurya 8 years, 1 month ago

Ammonium chloride& zinc chloride...
  • 3 answers

Radhika Tyagi 8 years, 1 month ago

The reaction won't occur at room temperature

Radhika Tyagi 8 years, 1 month ago

The *ans is incorrect as the conditions are not specified

Nayan Kumar 8 years, 1 month ago

Bromobenzene + NaOH ------ phenol + NaBr
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  • 1 answers

Radhika Tyagi 8 years, 1 month ago

Do name reaction and distinction first
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  • 1 answers

Punit Poonia 8 years, 1 month ago

Atoms- All the matter in the universe is made of tiny particles called Atoms. There are 92 different kinds of atoms. Element - when matter is made of only one kind of atom then it is called an Element. The fundamental substance which consists of only one kind of atom. Molecule - Smallest unit of chemical compound. When 2 or more atoms of same element combine together then we call them Molecule. Compound- Substance which are made by the combination of two or more kinds of elements are known as Compounds.

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