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Recent questions tagged chemistry
Questions
In the elimination reaction given below the alkene formed is
jeemain
aipmt
chemistry
nitrogen
organic-chemistry
cbse
class12
unit13
q37
medium
asked
Mar 26, 2014
by
thanvigandhi_1
1
answer
The $\beta$ and $\alpha$ - D- glucose have different specific rotations. When either anomer is dissolved in water, their rotation change until the same fixed value results. What term is used for these changes?
jeemain
chemistry
class12
unit14
biomolecules
carbohydrates
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
$\begin{array}{1 1}\text{statement 1- D Glucopyranose is a non-reducing sugar}\\\text{statement 2- Six membered pyranose ring is always in equalibrium with its open chain counterpart}\end{array}$
jeemain
chemistry
class12
unit14
biomolecules
carbohydrates
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Which of the following chemicals are used to prepare MIC which caused Bhopal gas tragedy?
jeemain
aipmt
chemistry
nitrogen
organic-chemistry
cbse
class12
unit13
q36
medium
asked
Mar 26, 2014
by
thanvigandhi_1
1
answer
If sucrose is treated with concentrated sulphuric acid, the product formed is
jeemain
chemistry
class12
unit14
biomolecules
carbohydrates
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
The product of the following reaction is
jeemain
aipmt
chemistry
nitrogen
organic-chemistry
cbse
class12
unit13
q35
medium
asked
Mar 26, 2014
by
thanvigandhi_1
1
answer
Starch is converted into maltose by the
jeemain
chemistry
class12
unit14
biomolecules
carbohydrates
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
The reagent which forms crystalline osazone derivative when reacted with glucose, is
jeemain
chemistry
class12
unit14
biomolecules
carbohydrates
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Identify the product $D$ in the following reaction
jeemain
aipmt
chemistry
nitrogen
organic-chemistry
cbse
class12
unit13
q34
medium
asked
Mar 26, 2014
by
thanvigandhi_1
1
answer
Which one of the following methods is neither meant for the synthesis nor for the separation of amines?
jeemain
aipmt
chemistry
nitrogen
organic-chemistry
cbse
class12
unit13
q33
medium
asked
Mar 26, 2014
by
thanvigandhi_1
1
answer
Glucose has difference from fructose in that it.
jeemain
chemistry
class12
unit14
biomolecules
carbohydrates
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Which amine is most basic in aqueous medium?
jeemain
aipmt
chemistry
nitrogen
organic-chemistry
cbse
class12
unit13
q32
medium
asked
Mar 26, 2014
by
thanvigandhi_1
1
answer
Cellulose on hydrolysis with dilute sulphuric acid,gives
jeemain
chemistry
class12
unit14
biomolecules
carbohydrates
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Amongst the following the most basic compound is
jeemain
aipmt
chemistry
nitrogen
organic-chemistry
cbse
class12
unit13
q31
medium
asked
Mar 26, 2014
by
thanvigandhi_1
1
answer
Treatment of (+)- glucose with $HIO_4$ gives the results that confirm its aldohexose structure. How many moles of $HIO_4$ should be consumed?
jeemain
chemistry
class12
unit14
biomolecules
carbohydrates
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Fructose reduces Tollen’s reagent due to
jeemain
chemistry
class12
unit14
biomolecules
carbohydrates
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
An electric current is passed though an aqueous solution of a mixture of alanine (isoelectric point 6.0),glutamic acid (3.2) and arginine (10.7) buffered at pH 6. What will happen to the three amino acids?
jeemain
chemistry
class12
unit14
biomolecules
amino-acids
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
$p - Cl - C_6H_4NH_2$ and $PhNH_36 + Cl^−$ can be distinguished by
jeemain
chemistry
class12
unit14
biomolecules
amino-acids
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
How can lysine and glycine be separated from each other?The isoelectric points are pH 9.6 for lysine and pH 5.97 for glycine
jeemain
chemistry
class12
unit14
biomolecules
amino-acids
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Amino acids constitute one of the important class of organic compounds.These are
jeemain
chemistry
class12
unit14
biomolecules
amino-acids
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
The structure of glycine at pH 6 is (isoelectric point = 6)
jeemain
chemistry
class12
unit14
biomolecules
amino-acids
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
What happens when electrolysis of alpha amino acid is done at isoelectric point?
jeemain
chemistry
class12
unit14
biomolecules
amino-acids
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Isoelectric point is:
jeemain
chemistry
class12
unit14
biomolecules
amino-acids
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Why Glycine exist as $(H_3N+CH_2COO^−)$ while antranilic acid ($p − NH_2 − C_6H_4 − COOH)$ does not exist as dipolar ion ?
jeemain
chemistry
class12
unit14
biomolecules
amino-acids
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Non-essential amino acids are
jeemain
chemistry
class12
unit14
biomolecules
amino-acids
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Essential amino acids are
jeemain
chemistry
class12
unit14
biomolecules
amino-acids
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
The molecular shapes of $SF_4,CF_4$ and $XeF_4$ are
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
molecular-orbital-theory
difficult
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Most efficient overlapping is
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
molecular-orbital-theory
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
The bond length in the species $O_2,O_2^+$ and $O_2^-$ are in the order
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
molecular-orbital-theory
medium
asked
Mar 26, 2014
by
sreemathi.v
1
answer
The relationship between the dissociation energy of $N_2$ and $N_2^+$ is
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
molecular-orbital-theory
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Which of the following arrangements correctly represent a decreasing order of bond angles?
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
molecular-orbital-theory
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Which one of the following structures is expected to have three bond pairs and one lone pair?
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
hybridization
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Among the following molecules,which is the most ionic?
jeemain
chemistry
physical-chemistry
class11
unit4
chemical-bonding-and-molecular-structure
ionic-or-electrovalent-bond
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
A metallic oxide contains 60% of the metal.The equivalent weight of the metal is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Compressibility factor (Z) for $N_2$ at $-50^{\large\circ}C$ and 800atm pressure is 1.95. Calculate mole of $N_2$ gas required to fill a gas cylinder of 100mL capacity under the given conditions.
jeemain
chemistry
states-of-matter
unit5
class11
medium
q154
asked
Mar 26, 2014
by
sharmaaparna1
1
answer
The composition of a sample of Wustite is $Fe_{0..93}O_{1.00}$.What percentage of the iron is present in the form of $Fe(III)$?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
difficult
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Zinc sulphate contains 22.65% of zinc and 43.9% of water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce 20g of the crystals will be
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Calculate molecular diameter of He from its Vander Waal's constant b = 24mL$mol^{-1}$
jeemain
chemistry
states-of-matter
unit5
class11
medium
q153
asked
Mar 26, 2014
by
sharmaaparna1
1
answer
The specific heat of a metal is 0.16, its approximate atomic weight would be
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
laws-of-chemical-combinations
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
The numerical value of N/n (where N is the number of molecules in a given sample of gas and n is the number of moles of the gas) is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
The best vaccum so far attained in laboratory is $10^{-10}mm$ of Hg. How many molecules of gas remain per $cm^3$ at $20^{\large\circ}C$ in this vaccum?
jeemain
chemistry
states-of-matter
unit5
medium
class11
q152
asked
Mar 26, 2014
by
sharmaaparna1
1
answer
The percentage of nitrogen in urea is about?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
$O_2$ is collected over water at $20^{\large\circ}C$. The pressure inside shown by the gas is 740 mm of Hg. What is the pressure due to $O_2$ alone if V.P of $H_2O$ is 18 mm at $20^{\large\circ}C$
jeemain
chemistry
states-of-matter
unit5
class11
medium
q151
asked
Mar 26, 2014
by
sharmaaparna1
1
answer
How many molecules are present in one gram of hydrogen?
jeemain
chemistry
class11
unit1
some-basic-concepts-in-chemistry
physical-chemistry
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
In the reaction,$4NH_3+5O_2\rightarrow 4NO+6H_2O$ when one mole of ammonia and one mole of oxygen are made to react completely then
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
50 litre of dry $N_2$ is passed through 36g $H_2O$ at $27^{\large\circ}C$. After passage of gas , there is a loss of 1.20g in water . Calculate vapour pressure of water.
jeemain
chemistry
states-of-matter
unit5
class11
medium
q150
asked
Mar 26, 2014
by
sharmaaparna1
1
answer
10 $dm^3$ of $N_2$ gas and $10\;dm^3$ of gas at X at the same temperature contain the same number of molecules. The gas $X$ is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
$O_2$ is present in one litre flask at a pressure of $7.6\times10^{-10}mm$ of Hg. Calculate the number of $O_2$ molecules at $0^{\large\circ}$C.
jeemain
chemistry
states-of-matter
unit5
class11
medium
q149
asked
Mar 26, 2014
by
sharmaaparna1
1
answer
A gas occupies one litre under atmosphere pressure. What will be the volume of the same amount of gas under 750mm of Hg at the same temperature?
jeemain
chemistry
states-of-matter
unit5
class11
medium
q148
asked
Mar 26, 2014
by
sharmaaparna1
1
answer
A sugar syrup of weight 214.2g contains 34.2g of sugar ($C_{12}H_{22}O_{11})$. Calculate (i) Molal concentration and (ii) Mole fraction of sugar in the syrup.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 26, 2014
by
sreemathi.v
1
answer
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