Recent questions in Chemistry

A 20g chunk of dry ice is placed in an empty 0.75 litre wine bottle tightly closed . What would be the final pressure in the bottle after all $CO_2$ has been evaporated and temperature reaches to $25^{\large\circ}C$

asked Mar 29, 2014 by sharmaaparna1

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The nucleic acid base having two possible binding sites is

asked Mar 29, 2014 by thanvigandhi_1

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A gas at $0^{\large\circ}C$ and 1 atm pressure occupies 2.5 litre . What change in temperature would be necessary if the pressure is to be adjusted to 1.5 atm and the gas has been transferred to a 2.0 litre container?

asked Mar 29, 2014 by sharmaaparna1

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The enzyme which hydrolyses triglycerides to fatty acids and glycerol is called

asked Mar 29, 2014 by thanvigandhi_1

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Number of chiral carbons In $ \beta -D-(+)$ glucose is

asked Mar 29, 2014 by thanvigandhi_1

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Which of the following represents peptide linkage?

asked Mar 29, 2014 by thanvigandhi_1

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The correct statement in respect of protein haemoglobin that is

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A hormone which helps in conversion of glucose to glycogen is

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The sequence of how many nucleotides in messenger RNA makes a codon for amino acid

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Which base is present in RNA but not in DNA?

asked Mar 29, 2014 by thanvigandhi_1

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Insulin production and its action in human body are responsible for the level of diabetes The compound belong to which of the following categories?

asked Mar 29, 2014 by thanvigandhi_1

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The reason for the double helical structure of DNA is the operation of

asked Mar 29, 2014 by thanvigandhi_1

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Complete hydrolysis of cellulose gives

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Vitamin $B_{12}$ contains

asked Mar 28, 2014 by thanvigandhi_1

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Insulin belongs to the category of

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Ergocalciferol is a name of vitamin

asked Mar 28, 2014 by thanvigandhi_1

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Which name is associated with the chemical substances produced in ductless endocrine glands?

asked Mar 28, 2014 by thanvigandhi_1

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With which of the following disease is Vitamin K associated?

asked Mar 28, 2014 by thanvigandhi_1

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Which one of the following is synthesized in our body by sun rays?

asked Mar 28, 2014 by thanvigandhi_1

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Which one of the following vitamins checks night blindness?

asked Mar 28, 2014 by thanvigandhi_1

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ATP represents

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Which of the following is correct about H-bonding in nucleotide?

asked Mar 28, 2014 by thanvigandhi_1

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Among $FeSO_4.7H_2O(A),CuSO_4.5H_2O (B), ZnSO_4.7H_20(c),MnSO_4.4H_2O $(D), isomorphous salts are

asked Mar 28, 2014 by meena.p

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The atomic weights of two elements A and B are 40 and 80 respectively . If xg of A contains y atoms, how many atoms are present in $2x\;gram$ of B?

asked Mar 28, 2014 by meena.p

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Amino acids are least soluble in water

asked Mar 28, 2014 by thanvigandhi_1

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Which of the following is isomorphous with magnesium sulphate $(Mg SO_4. 7H_2O)$?

asked Mar 28, 2014 by meena.p

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The sequence of bases on $m-RNA$ molecule, synthesized on the $GCATA$ strand of $DNA$ is

asked Mar 28, 2014 by thanvigandhi_1

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Which of the following bases is not present in RNA?

asked Mar 28, 2014 by thanvigandhi_1

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In nucleic acids, the sequence is

asked Mar 28, 2014 by thanvigandhi_1

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Which of the following is an example of zwitter ion?

asked Mar 28, 2014 by thanvigandhi_1

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Lactose on hydrolysis yields

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Glucose reacts with $X$ number of molecules of phenylhydrazine to give osazone .The value of $X$ is

asked Mar 28, 2014 by thanvigandhi_1

2 answers

The charge on 1 gram ion of $Al^{3+}$ is :

asked Mar 28, 2014 by meena.p

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The unit $J\; Pa^{-1}$ is equivalent to

asked Mar 28, 2014 by meena.p

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A balanced chemical equation is in accordance with

asked Mar 28, 2014 by meena.p

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The linkage holding monosaccaride units in maltose is

asked Mar 28, 2014 by thanvigandhi_1

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The acid showing salt like character in aqueous solute is

asked Mar 28, 2014 by thanvigandhi_1

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Which of the following is not an amino acid?

asked Mar 28, 2014 by thanvigandhi_1

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Which substance is not present in nucleic acid?

asked Mar 28, 2014 by thanvigandhi_1

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The function of enzymes in the living systems is to

asked Mar 28, 2014 by thanvigandhi_1

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The helical structure of protein is stabilised by

asked Mar 28, 2014 by thanvigandhi_1

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Glucose reacts with acetic anhydride and forms

asked Mar 28, 2014 by thanvigandhi_1

2 answers

Which of the following has three significant figures ?

asked Mar 28, 2014 by meena.p

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Find the equivalent weight of $H_3PO_4$ in the reaction. $Ca(OH)_2 +H_3 PO_4 \to CaHPO_4+2H_2O$

asked Mar 28, 2014 by meena.p

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How many milliliters of $0.5\;M\;H_2SO_4$ are needed to dissolve $0.5\;g$ of copper (II) carbonate ?

asked Mar 28, 2014 by meena.p

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A plant virus is found to consists of uniform cylindrical particles of $150 A^{\circ}$ in diameter and $5000\;A^{\circ}$ long. The specific volume of the virus is $0.75\;cm^3/g$ If the virus is considered to be a single particle , find its molar mass.

asked Mar 28, 2014 by meena.p

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Calculate the molarity of water if its density is $1000 kg/m^3$

asked Mar 28, 2014 by meena.p

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5g of ethane are confined in a bulb of 1 litre capacity . The bulb is so weak that it will burst if the pressure exceeds 10 atm. At what temperature will be the pressure of gas reach the bursting value?

asked Mar 28, 2014 by sharmaaparna1

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Atomic and molecular sizes are of the order of a few Angstrom (1 $\overset{\circ}{A} = 10^{-10}m)$ . Assuming that $N_2$ molecules is spherical in shape with radius $2\times10^{-10}m$ . Calculate the volume of single $N_2$ molecule.

asked Mar 28, 2014 by sharmaaparna1

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Calculate the molality of 1 litre solution of $93 \ % H_2SO_4 $ (weight / volume). the density of the solution is $1.84\;g/ml$.

asked Mar 28, 2014 by meena.p

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