Incorrect URL accessed!!!!

ANSWER

Which noble gas is used in filling balloons for meteorological observation?

Posted by Shubhi Singh 7 years, 10 months ago

CBSE > Class 12 > Chemistry

3 answers

Jin Kazama 7 years, 10 months ago

He ?

Tanay Sharma 7 years, 10 months ago

Helium(He)

Yash Mishta 7 years, 10 months ago

nitrogen gas

4Thank You

ANSWER

F2 has lower bond dissociation enthalpy than cl2 why?

Posted by Shubhi Singh 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Tanvi Singh 7 years, 10 months ago

Due to repulsion among non bonding pairs of electrons.

ANSWER

What is colliod

Posted by Navneet Veerwal 7 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Show that a first order solution

Posted by Ashim Bormon 7 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is sol

Posted by Chemistry Chemistry 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Aman Jha 7 years, 10 months ago

A sol is a type of colloid in which solid particles are suspended in a liquid. The particles in a sol are very small. The colloidal solution displays the Tyndall effect and is stable. Sols may be prepared via condensation or dispersion. Adding a dispersing agent may increase the stability of a sol. One important use of sols is in the preparation of sol-gels.

ANSWER

Polymers chapter se kisi bhi chiz ka uses important hai kya puchte hai kya board exam me ?

Posted by Trishala Vijaywargiya 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Ishu Chouhan 7 years, 10 months ago

Yes ,must study ,do not neglect anything

ANSWER

How the supersonic jet aeroplane are responsible for the depletion of ozone layer?

Posted by Shubhi Singh 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Nikita Mishra 7 years, 10 months ago

Bcz they release nitrogen oxide which combines with ozone

ANSWER

Which form of the iron is the purest form of commercial iron.?

Posted by Shubhi Singh 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Pankaj Sihag 7 years, 10 months ago

Wrought iron

Shashank Sen 7 years, 10 months ago

Magnetite

ANSWER

What is the role of silica in the extraction of copper?

Posted by Shubhi Singh 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Pankaj Sihag 7 years, 10 months ago

It act as flux which slag of iron impurities as iron silicate

ANSWER

Indicate the principle behind the method used for the refining of zinc?

Posted by Shubhi Singh 7 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

The presence of nitro group (-NO2) at o/p position increase the reactivity of haloarenes towards nucleophilic substitution inactive?

Posted by Shubhi Singh 7 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Racemic mixture is optically inactive.?

Posted by Shubhi Singh 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Puneet K 7 years, 10 months ago

Racemic mixture is having both dextrorotatory and leavorotatory forms and hence the net rotation of plane polarised light comes out to be zero.

Ayushi Jaiswal 7 years, 10 months ago

Because it has both dextro and levo structure hence cancel out each other net moment results out to be 0

ANSWER

Write the name of vitamin whose deficiency cause bone deformities in children?

Posted by Shubhi Singh 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Puneet K 7 years, 10 months ago

Calciferol or vitamin D

ANSWER

how to write swart's rxn

Posted by Bakhshish Laddy 7 years, 10 months ago

CBSE > Class 12 > Chemistry

9 answers

Aisha Grewal 7 years, 10 months ago

Yar tu nam bdl l na..... Mmmmmmmwwwwwww

Aisha Grewal 7 years, 10 months ago

Bilkul vo to finklestein rxn h....... Sorry

Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

R-Br + AgF ----------> RF +AgBr ............... Ye sahi hai

Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Galat hai

Aisha Grewal 7 years, 10 months ago

Shi h

Jin Kazama 7 years, 10 months ago

NaX + AgI -----> NaI + AgX ?

Jin Kazama 7 years, 10 months ago

Sorry

Aisha Grewal 7 years, 10 months ago

Y ni h

Jin Kazama 7 years, 10 months ago

R-X + 2Na + X-R ----> R-R + 2NaX ?

ANSWER

Copper which crystallizes as a face – centred cubic lattice has a density of 8.93g/cm3 at 20o C. calculate the length of the unit cell.

Posted by Ruchita Jaiswal 7 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

some substance can act bothh as colloids and crystalo8ds

Posted by Niranjan Panjiyar 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Jin Kazama 7 years, 10 months ago

Depend on type of disperse medium

ANSWER

what happen orthophosphorous heated

Posted by Niranjan Panjiyar 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Akash Agarwal 7 years, 10 months ago

It undergoes disproportionation reaction to form PH3 n H3PO4

ANSWER

Limitations of Henry law

Posted by Vijeta Kanwar 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Jin Kazama 7 years, 10 months ago

this law is applicable only for sufficiently dilute solution

ANSWER

Product when ammonia is treated with ZnSO4

Posted by Mangangamba Thokchom 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Jin Kazama 7 years, 10 months ago

[Zn(NH3)4]SO4 complex comp. banega ?

ANSWER

What do u mean by solid

Posted by Shanu Choubey 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Mahima Kumari 7 years, 10 months ago

Packing of atoms closest to each other

Jin Kazama 7 years, 10 months ago

ठोस ?

4Thank You

ANSWER

ClF3 exists but FCl3 do not why

Posted by Lovepreet Singh 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Jasmine Chhikara 7 years, 10 months ago

Because fluorine is more electronegative than chlorine. Hence it cannot acquire positive charge.

Atishay Jain 7 years, 10 months ago

Because cl has d subshell but F not

ANSWER

Is it important to study the classification of drugs in chemistry in every day life?

Posted by Trishala Vijaywargiya 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Jin Kazama 7 years, 10 months ago

Pad le kya pata a jaye ?

ANSWER

Di oxygen is a gas but sulphur is a solid give reason

Posted by Maloo Maloo 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Jin Kazama 7 years, 10 months ago

Weak van der walls force in oxygen and sulphur exist as F6 ya F8 so it is solid ?

ANSWER

Why is charcoal activated before use

Posted by Sumaiya Mir 7 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Pencillin is which type of antibiotic??

Posted by Himanshu Jain 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Balbir Singh 7 years, 10 months ago

Penicillin G is narrow spectrum antibiotic

Madiha Faraz 7 years, 10 months ago

Narrow spectrum antibiotic

ANSWER

define vant hoff factor

Posted by Rakshak Dalmia 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Shivansh Gupta 7 years, 10 months ago

It is the ratio of abnormal colligative property and normal colligative property

Jin Kazama 7 years, 10 months ago

i ?

ANSWER

What is d d transition

Posted by K S Asna 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Sabhya Sood 7 years, 10 months ago

Splitting of d orbitals due to the presence of a strong ligand(as per crystal field theory)

ANSWER

M dinitrobenzene + NH4HS

Posted by Pritam Chowdhury 7 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Lyophilic Sol is more stable than Lyophobic Sol?

Posted by Shubhi Singh 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Vineet Gupta 7 years, 10 months ago

Stabilty of lyophobic sol is only due to similar charge on particles , but in lyophillic stability is both due to presense of simmilar charge and the strong attractive forces b/w dispesed phase and dispersion medium