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3.5 ppm of SO2 is present in the 1 mole of air. What is the mass of SO2 in Air?

Posted by Sakshi Rawat 4 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Difference between aquoes and liquid

Posted by Saurabh Sharma 4 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 3 months ago

Liquid is nothing but a state of matter. In liquid elements are chemically bonded together. For example water is a liquid in which hydrogen & oxygen chemically bonded. Aqueous solutions are nothing but a solution in which water is a solvent and a substance called solute is dissolved in solvent.

ANSWER

What type of solid is Napthalene?

Posted by __I.Am.Shyam. Jaat?__ 4 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

__I.Am.Shyam. Jaat?__ 4 years, 3 months ago

Thanks

Lovepreet Kaur Sahota 4 years, 3 months ago

Molecular solid..

ANSWER

Define types of semi conductors

Posted by Chiranjeev Dash 4 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Ankit ?? Kumar 4 years, 3 months ago

N type and p type P type semiconductor carries positive charge and n type semiconductor carries negative charge i.e electron

ANSWER

How aminoethane will be obtained from ethanamide

Posted by Tushar Lalchandani 4 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Black Panther 4 years, 3 months ago

Hoffmann bromamide

ANSWER

Project on environmental pollution

Posted by Gowri Goswami 4 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

__I.Am.Shyam. Jaat?__ 4 years, 3 months ago

Pollution is a wide problem all over the world. So check on google for better Answer.

Sia ? 4 years, 3 months ago

Pollution affects both the living as well as the non-living components of the environment. It brings about drastic changes in the physical environment causing community wide problems by polluting the air, water and land; adversely affecting the health of humans and animals, and damaging plants and property.

ANSWER

A compound forms hexagonal close packed structure. What is the total number of voids in 0.5mol of it? How many of these are tetrahedral voids?

Posted by M. Vanajith 4 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Sia ? 4 years, 3 months ago

A compound forms hexagonal close-packed structure. What is the total number of voids in 0.5 mol of it ? How many of these are tetrahedral voids?

Sudhir Pathak 4 years, 3 months ago

In case of structure and voids , we should use relation as following. Structure =N Octahedral void = N Tetrahedral void =2N Total no. Of voids= 3N In this question N=0.5 mol

ANSWER

Formula of nacl

Posted by Rishu Budera 4 years, 3 months ago

CBSE > Class 12 > Chemistry

4 answers

Raj'S Desk 4 years, 3 months ago

NaCl Sodium Chloride table salt

Vishal Singh 4 years, 3 months ago

If It is chemical name then it would be sodium chloride

Sia ? 4 years, 3 months ago

NaCl

Aahana ❄❄ 4 years, 3 months ago

NaCl

ANSWER

Why Amorphous solids are called as pseudo solids?

Posted by Poleboina Rishitha 4 years, 3 months ago

CBSE > Class 12 > Chemistry

5 answers

Vaishali ..... 4 years, 3 months ago

Glass is considered to be super cooled liquid or pseudo solids because it shows some of the characteristics of liquids though it is an amorphous solid. For example , it is slightly thicker at the bottom . This can be possible only if it has flown like liquid , though very slowly . Hope it will helpful to u Thanku

Poleboina Rishitha 4 years, 3 months ago

Examples plz

Priya Rao 4 years, 3 months ago

Because they have tendency to flow slowly

Anchal Shukla 4 years, 3 months ago

Amorphous solids are also called super cooled liquids like glass. We can see that in ancient palaces glass of windows as example of it

Studious Fellow 4 years, 3 months ago

Like liquids amorphous solids have tendency to flow but very slowly so therefore they are called pseudo solids

ANSWER

In an S N1 reaction of alkyl halide on chiral center there is .....

Posted by Muskan Saini 4 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Muskan Saini 4 years, 3 months ago

Tq dear

__I.Am.Shyam. Jaat?__ 4 years, 3 months ago

Inversion more than retention leading to partial racemizatiom.

ANSWER

Why aluminium nitrite is an covalent solid

Posted by Tanisha Sodani 4 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

फेहलिंग अभिकर्मक किसे कहते है

Posted by Puspa Patail 4 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Mewalal Dewangan 4 years, 3 months ago

fehling abhikaramk

Bawan Netam 4 years, 3 months ago

फेहलिंग अभिकर्मक क्या है?

ANSWER

How does GCV differ from NCV? A sample of coal was analyzed as follows, Weight of coal burnt 1.029 g, weight of water taken in calorimeter is 2200g, Water Equivalent of apparatus is 570 g, Rise in temperature is 2.30C. Cooling correction is 0.047 o C Fuse wire correction is 3.8 cal and acid correction is 62.6 cal. Cotton thread correction is 1.6 Cal. Calculate GCV and NCV of coal if it contains 0.5% Hydrogen

Posted by Surbhi Panwar 4 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

An optically active compound is (a) 1-bromobutane (b) p-bromobutyric acid (c)2-bromo-2-methylpropane (d)1-bromo-2-methylpropane

Posted by Sony Chauhan 4 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

To phenyl 2 chloropropane on treatment with alcohol KOH gives which of the following as major product? (1) 2-phenylpropene (2) 3-phenylpropan (3)1-phenylpropan-2-ol (4)1-phenylpropan-3-ol

Posted by Sony Chauhan 4 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Assertion the para isomers are high melting as compared to their orthoand meta isomers reason:charge separation is higher in Para isomer.

Posted by Sony Chauhan 4 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 3 months ago

Please ask question with complete information.

ANSWER

Assertion: the boiling points of chloride Bromide and iodide ions are considerable higher than those of the hydrocarbons of comparable molecular mass. reason:c-x bond is Polar.

Posted by Sony Chauhan 4 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 3 months ago

Please ask question with complete information.

ANSWER

Assertion: Kinkelstein reaction is carried out in presence of acetone. reason: in facilities the forward direction according to Le chatelier's principle by participating by-product.

Posted by Sony Chauhan 4 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 3 months ago

Please ask question with complete information.

ANSWER

Assertion: alkyl halides are not prepared by reaction of phenol with Vinyl chloride Reason: carbon oxygen bond in phenols is difficult to break due to partial double bond character.

Posted by Sony Chauhan 4 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Assertion:thionyl chloride is preferred over Phosphorus Chloride for the preparation of alkyl chlorides from alcohols. Reason: Phosphorus chloride does not give pure alkyl halide. (1) both assertion and reason are correct and reason is not the correct explanation of the assertion. (2) both assertion and reason are correct but reason is not the correct explanation of assertion. (3) assertion is correct but reason is incorrect. (4) assertion is incorrect but reason is correct.

Posted by Sony Chauhan 4 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

For a given alkyl group, the boiling point of alkyl halides follow the order: (1) RL>RBr>RCL> (2) RCL>RBr>RI (3) RI>RCI>RBr (4) RBr>RI>RCL

Posted by Sony Chauhan 4 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Ravi Kumar 4 years, 3 months ago

(1) (RI>RBr>RCL) is correct answer.

ANSWER

Define order of reaction

Posted by Ambika Shahdeo 4 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Sia ? 4 years, 1 month ago

Order of a chemical reaction can be defined as the sum of power of concentration of reactants in the rate law expression is called the order of that chemical reaction. Reactions can be first order reaction, second order reaction, pseudo first order reaction etc. depends on the concentration of the reactants. Order of a reaction is an experimental value. It means it is an experimentally determined parameter. It can have fractional value as well.

ANSWER

Assuming that Raoult's Law is followed,what would be the vapour pressure of a solution formed when 40 g of sugar(molecular mass 342) is dissolved in 360 mL of water at 25°C? At 25°C the vapour pressure of water is 20 mm and the density is 1g/mL

Posted by Taranveer Singh 4 years, 3 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Kia paper cancel honge ?

Posted by Kunal Garg 4 years, 3 months ago

CBSE > Class 12 > Chemistry

3 answers

Devil ? 4 years, 3 months ago

Ho gye n

Anurag Saral 4 years, 3 months ago

No... obviously...

Bhanu Khumawat 4 years, 3 months ago

No..?

ANSWER

D block elements

Posted by Atriman Shukla 4 years, 3 months ago

CBSE > Class 12 > Chemistry

3 answers

Sia ? 4 years, 3 months ago

Priya Rao 4 years, 3 months ago

Sc,ti,v,cr,mn,fe,co,ni,cu,zn

Black Panther 4 years, 3 months ago

Sia..

ANSWER

Assertion: The first layer is mobile in Helmholtz electrical double layer. Reason: The potential difference between the fixed layer and the diffused layer of opposite charges is called zeta potential.

Posted by Anbu Chelvan 4 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Prabhjot Kaur 4 years, 2 months ago

d option) assertion is wrong stament but reason is correct statement

Prabhjot Kaur 4 years, 2 months ago

d option

ANSWER

In group 15 elements, there is considerable increase in covalent radius from N to P but small increase from As to Bi. Why?

Posted by Gloria Laloo 4 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Anuradha Patwari 4 years, 3 months ago

Due to inert pair effect

ANSWER

Write 5 small difference between adsorption and absorption

Posted by Sh G 4 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Rounik Roy 4 years, 3 months ago

See in ncert book

ANSWER

How to differentiate between Friedel crafl alkylation reaction and friedal craft allilation

Posted by Ankit Soni 4 years, 3 months ago

CBSE > Class 12 > Chemistry

3 answers

Bhawana Mishra 4 years, 3 months ago

Alkyl ka reagent - AlCl³ hota hai or acylation ka CH3COCl

Black Panther 4 years, 3 months ago

Reagent is - an alcl3

Black Panther 4 years, 3 months ago

Alkyl means - ch3-cocl Allylation means - ch3-cl.

ANSWER

Knowing the radii of tha cation and anion of an ionic compound how can you predict the structure of the compound ?

Posted by Urvashi Sharma 4 years, 3 months ago

CBSE > Class 12 > Chemistry

3 answers

Taranveer Singh 4 years, 3 months ago

If it is 0.155-0.225 structure is trigonal If it's 0.225-0.414 structure is tetrahedral If it's 0.414-0.732 structure is octahedral 0.731-1.00 structure is BCC

Taranveer Singh 4 years, 3 months ago

After that if it comes: <0.155 structure is linear

Taranveer Singh 4 years, 3 months ago

Find the radius ratio which is : radius of cation/radius of anion

ANSWER

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