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Recent questions in Chemistry
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JEEMAIN and NEET
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Chemistry
Chemistry
Some Basic concepts in Chemistry
Atomic Structure
Classification of Elements and Periodicity in Properties
Chemical Bonding and Molecular Structure
Chemical Thermodynamics
Equilibrium
Redox Reactions
Hydrogen
s-Block Elements
p-Block Elements
P-Block elements (Group-13 and Group-14)
Hydrocarbons
Some Basic principles of Organic chemistry
Environmental Chemistry
States of Matter: Liquids and Gases
States of Matter: Solid State
Solutions
Electrochemistry
Surface Chemistry
General Principals and Processes of Isolation of Metals
p-Block elements (Group-15 to Group-18)
d-and-f-Block Elements
Co-ordination Compounds
Halogens
Oxygen: Alchohols, Phenols and Ethers
Nitrogen
Polymers
Biomolecules
Chemistry in everyday life
Practical Chemistry
Chemical Kinetics
Purification and Characterisation of Organic Compounds
Oxygen: Aldehydes, Ketones and Carboxylic Acids
Why does PbI4 not exist
chemistry
asked
Jan 21, 2015
by
venkatesh.purushotham
1
answer
explain the following reaction
chemistry
asked
Jan 21, 2015
by
venkatesh.purushotham
1
answer
differentiate between monomer and dimer with an example ?
chemistry
asked
Jan 21, 2015
by
venkatesh.purushotham
1
answer
what is the difference between the structure of AlCl3 and diborane?
chemistry
asked
Jan 21, 2015
by
venkatesh.purushotham
1
answer
The relative strength of Lewis acidity of boron trihalides is found to follow the following trend. BI3>BBr3>BCl3>BF3
chemistry
asked
Jan 21, 2015
by
venkatesh.purushotham
1
answer
How is valency of a carbon atom in graphite satisfied as each carbon atom is bonded to only three other carbon atoms ?
chemistry
asked
Jan 21, 2015
by
venkatesh.purushotham
1
answer
why sand is used to extinguish fire during wars and not water?
chemistry
asked
Jan 20, 2015
by
venkatesh.purushotham
1
answer
Why group 2 elements have stronger metallic bonding than group 1 elements?
chemistry
asked
Jan 20, 2015
by
venkatesh.purushotham
1
answer
How can we say that Higher the metallic bonding , Higher is the electrical conductivity?
chemistry
asked
Jan 20, 2015
by
venkatesh.purushotham
1
answer
The hydration enthalpy of lithium is less negative or more negative as compared to other elements in its group?
chemistry
asked
Jan 20, 2015
by
venkatesh.purushotham
1
answer
Why lithium stearateis used for lubricating bearings in machines?
chemistry
asked
Jan 20, 2015
by
venkatesh.purushotham
1
answer
Why is a barium salt like barium sulphate used in diagnosing ulcers? answer by tomorrow as i have exam on thurshday
chemistry
asked
Jan 20, 2015
by
venkatesh.purushotham
1
answer
how bond length is same for both hydrogen and deuterium molecules?
chemistry
asked
Jan 20, 2015
by
venkatesh.purushotham
1
answer
why ΔH = energy used in bond breaking reactions − energy released in bond making products and not ΔH = energy released in bond making products - energy used in bond breaking reactions .
chemistry
asked
Jan 20, 2015
by
venkatesh.purushotham
1
answer
why enthalpy of hydration is negative?
chemistry
asked
Jan 20, 2015
by
venkatesh.purushotham
1
answer
why smaller the size of the cation - then greater is the hydration enthalpy?
chemistry
asked
Jan 20, 2015
by
venkatesh.purushotham
1
answer
what is inductomeric effect ?
advance
class11
asked
Jan 7, 2015
by
shiva31smart
1
answer
explain meta directing property of CCl3 due to +R effect or reverse conjugation?
class
class11
jee
advance
asked
Jan 7, 2015
by
shiva31smart
1
answer
In the cathode ray experiment how low pressure can increase the space between the atoms of the gas?
class11
asked
Dec 22, 2014
by
venkatesh.purushotham
1
answer
main function of roasting
asked
Dec 12, 2014
by
sudharsanselvam2
2
answers
fractional distillation of coal tar yieds?
asked
Dec 12, 2014
by
sudharsanselvam2
1
answer
examples for ore of aluminium
asked
Dec 12, 2014
by
sudharsanselvam2
2
answers
How to determine osmotic pressure in mixture of three different solution?
asked
Nov 30, 2014
by
abhishek97banerjee
1
answer
How to determine molarity in simple way?
asked
Nov 27, 2014
by
abhishek97banerjee
1
answer
what would be the ratio of mean square velocity of hydrogen gas at 50K and that of oxygen gas at 800K?
jeemain
chemistry
class12
states-of-matter
kinetic-molecular-theory-of-gases
mean-square-velocity
easy
asked
Sep 18, 2014
by
anonymous
1
answer
A sample of wustite $Fe_xO$ contains one $Fe(III)$ for every three $Fe(II).$ Calculate the value of x.
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 11, 2014
by
meena.p
1
answer
The composition of a sample of wiistite is $Fe_{0.93} O_{1.00-}$. What percentage of the ion is present in the form of $Fe(III)?$
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 11, 2014
by
meena.p
1
answer
Calculate the percentage of void volume in the body centred
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 11, 2014
by
meena.p
1
answer
Calculate the percentage of void volume in the primitive
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 11, 2014
by
meena.p
1
answer
Lil occurs as cubical - closest packing . If the edge length of a unit cell is $624\;pm$ , determine the ionic radii of $Li^{+}$ and $I^{-}$ ions.
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 11, 2014
by
meena.p
1
answer
KCl crystallizes in the same type of lattice as does $NaCl$ . Given that $\large\frac{r_{Na^{+}}}{r_{cl^{-}}}$$=0.5$ and $\large\frac{r_{Na^{+}}}{r_{K^{+}}}$$=0.5$ calculate the ratio of density of NaCl to that KCl
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 11, 2014
by
meena.p
1
answer
KCl crystallizes in the same type of lattice as does $NaCl$ . Given that $\large\frac{r_{Na^{+}}}{r_{cl^{-}}}$$=0.5$ and $\large\frac{r_{Na^{+}}}{r_{K^{+}}}$$=0.5$ calcute the ratio of the unit cell for $KCl$ to that for $NaCl$
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 11, 2014
by
meena.p
1
answer
If the radius of $Cs^{+}$ is $169\;pm$ and that of $Cl^{-}$ is $181\;pm$ , predict the structure of $CsCl$. What is the coordination number of $Cs^{+}$ ion ?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 11, 2014
by
meena.p
1
answer
A solid $A^{+}B^{-}$ has an $NaCl$ type closet packed structure . If the radius of the anion is $250\;pm$ What is the radius of the cation ?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 8, 2014
by
meena.p
1
answer
The atomic radius of stronitum is $215\;pm$ and it crystallizes with a cubical closest - packed structure . Calculate the density of strontium. The molar mass of strontium is $ 87.6\;g\;mol^{-1}$
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 8, 2014
by
meena.p
1
answer
Caesium chloride may be considered to form interpenetrating simple primitive cubic crystals. The edge length of unit cell is $412\;pm$. Determine the ionic radius of $Cs^{+}$ if the ionic radius of $Cl^{-}$ if the ionic radius of $Cl^{-}$ is $181$ P.m Given $M(C_s)=133\;g\;mol^{-1}$
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 8, 2014
by
meena.p
1
answer
Caesium chloride may be considered to form interpenetrating simple primitive cubic crystals. The edge length of unit cell is $412\;pm$. Determine the density of $CsCl$
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 8, 2014
by
meena.p
1
answer
The edge length of cubic unit cell of metallic calcium is $556\;pm$ If the density of calcium is $1.54 \;g\;cm^{-3}$ and its molar mass is $40.08];g\;mol^{-1}$ calculate the radius of calcium atom.
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 8, 2014
by
meena.p
1
answer
Calculate the radius of molybdenum atom if the element crystallizes as body- centred cubic crystals. Given: Density of $Mo=10.3\;g\;cm^{-3}$ and molar mass of $Mo= 95.94 \;g\;mol^{-1}$
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
solved problems
composition-of-a-solution
medium
asked
Aug 8, 2014
by
meena.p
1
answer
The van't Hoff factor of the compound $K_3Fe(CN)_6$ in dilute solution is
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
vant-hoff-factor
colligative-properties
vant-hoff
easy
asked
Aug 8, 2014
by
meena.p
2
answers
The Van't Hoff factor of acetic acid in water will be
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
vant-hoff-factor
colligative-properties
vant-hoff
easy
asked
Aug 8, 2014
by
meena.p
1
answer
The van't hoff factor for $0.1\; molal\;Ba(NO_3)_2$ solution is $ 2.74$. Its degree of dissociation is
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
vant-hoff-factor
colligative-properties
vant-hoff
easy
asked
Aug 8, 2014
by
meena.p
1
answer
Which of following electrolytes would have the same van't hoff factor as that of potassium ferricyanide ?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
vant-hoff-factor
colligative-properties
vant-hoff
easy
asked
Aug 8, 2014
by
meena.p
1
answer
The Van't Hoff factor of benzoic acid in benzene is found to be
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
vant-hoff-factor
colligative-properties
vant-hoff
easy
asked
Aug 8, 2014
by
meena.p
1
answer
The degree of dissociation $(\alpha)$ of a weak electrolyte $A_xB_y$ is related to van't Hoff factor (i) by the expression
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
vant-hoff-factor
colligative-properties
vant-hoff
easy
asked
Aug 8, 2014
by
meena.p
1
answer
A $ 0.004\;M$ solution of $K_2SO_4$ is isotonic with a $0.010\;M$ Solution of glucose at the same temperature . Tge apparent per cent degree of dissociation of $K_2SO_4$ is
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
osmotic pressure
colligative-properties
osmotic-pressure
medium
asked
Aug 7, 2014
by
meena.p
1
answer
Which of the following pairs of solutions are expected to be isotonic?
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
osmotic pressure
colligative-properties
osmotic-pressure
medium
asked
Aug 7, 2014
by
meena.p
1
answer
In the phenomenon of osmosis through the semipermeable membrane
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
osmotic pressure
colligative-properties
osmotic-pressure
medium
asked
Aug 7, 2014
by
meena.p
1
answer
The osmotic pressure of $0.1\;M$ sodium chloride solution at $27^{\circ}C$ is
jeemain
chemistry
physical-chemistry
class12
ch2
solutions
osmotic pressure
colligative-properties
osmotic-pressure
easy
asked
Aug 7, 2014
by
meena.p
1
answer
The osmotic pressure of a solution $(density =1.02\;g \;cm^{-3})$ Containing 50 g glucose $(C_6H_{12}O_6)$ in 1 kg of water at 300 K is
jeemain
chemistry
physical-chemistry
class12
ch2
sec-b
solutions
osmotic pressure
colligative-properties
osmotic-pressure
easy
asked
Aug 7, 2014
by
meena.p
1
answer
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