Recent questions in Chemistry

The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is

asked Jun 27, 2018 by meena.p

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Excess of KI reacts with $CuSo_4$ solution and then $Na_2S_2O_3$ solution is added to it. Which of the statements is incorrect for this reaction ?

asked Jun 27, 2018 by meena.p

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One mole of $N_2H_4$ loses 10 mole electrons to form a new compound Y. Assuming that all the N2 appears in new compound, what is the oxidation state of Nitrogen in Y? (There is no change in the oxidation state of H)

asked Jun 27, 2018 by meena.p

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Find the oxidation number of $S$ in $HSO^{3-}$ ion

asked Jun 27, 2018 by meena.p

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What is the pressure of HCl gas at $-40^{\large\circ}C$ if its density is $8.0 kgm^{-3}? (R = 8.314 JK^{-1}mol^{-1})$

asked Jun 26, 2018 by meena.p

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The average K.E of an ideal gas in calories per mole is approximately equal to _______

asked Jun 26, 2018 by meena.p

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Rate of diffusion of a gas is _________

asked Jun 26, 2018 by meena.p

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Kinetic energy of a gas depends upon its

asked Jun 26, 2018 by meena.p

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Gases deviate from the ideal gas behaviour because their molecules

asked Jun 26, 2018 by meena.p

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As the temperature is raised from $20^{\circ}$ to $40^{\circ}C$ , the average kinetic energy of neon atoms charges by a factor of which of the following ?

asked Jun 26, 2018 by meena.p

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Kinetic theory of gases proves

asked Jun 26, 2018 by meena.p

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For an ideal gas, number of moles per litre in term of its pressure P, gas constant R and temperature T is

asked Jun 26, 2018 by meena.p

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Calculate the temperature at which $28g\; N_2$ occupies a volume of 10 litre at $2.46\;atm$

asked Jun 26, 2018 by meena.p

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A gas occupies one litre under atmospheric pressure. What will be the volume of the same amount of gas under 750 mm of Hg at the same temperature?

asked Jun 26, 2018 by meena.p

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Select one correct statement . In the gas equation $PV=nRT$

asked Jun 25, 2018 by meena.p

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Which is not true in case of an ideal gas ?

asked Jun 25, 2018 by meena.p

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According to kinetic theory of gases , the energy per mode of gas is equal to ______

asked Jun 25, 2018 by meena.p

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Helium atom is two times heavier than hydrogen molecule at $298\;K$ , the average kinetic energy of helium is ______

asked Jun 25, 2018 by meena.p

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Which of the following statement is false?

asked Jun 25, 2018 by meena.p

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A pressure of 0.101325 bar when expressed in atmospheres represents

asked Jun 25, 2018 by meena.p

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What will be the minimum pressure required to compress $500\;dm^3$ of air at 1 bar to $200\;dm^3$ at $30^{\circ}C?$

asked Jun 25, 2018 by meena.p

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When 200 milliliters of a gas at constant pressure is heated, its volume

asked Jun 25, 2018 by meena.p

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Graham's Law refers to

asked Jun 25, 2018 by meena.p

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In the graphic representation of the energy contents of the reactants and the resulting products in an exothermic reaction, the energy content would be

asked Jun 25, 2018 by meena.p

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If $y=12$ and $2x-y=14$, find the value of $\large \frac{4x}{y}$

asked Jun 15, 2018 by meena.p

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Ortho - Nitrophenol is less soluble in water that p and m nitrophenols because

asked Jun 15, 2018 by meena.p

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The type of bonds present in $CuSO_4.5H_2O$ are only

asked Jun 15, 2018 by meena.p

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A diatomic molecule has a dipole moment equal to $1.2 \;D$ , If bond length is $1.0\;a^{\circ}$ What fraction of electronic charge 'e' exists on each atom ?

asked Jun 15, 2018 by meena.p

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Which formula represents a molecular substance?

asked Jun 15, 2018 by meena.p

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In which case electron from bonding molecular orbital is removed?

asked Jun 15, 2018 by meena.p

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According to molecular orbital theory,which of the following statement is not correct?

asked Jun 15, 2018 by meena.p

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According to molecular orbitals theory which of the following statement about the magnetic character and bond order is correct regarding $O_2^{+}$?

asked Jun 15, 2018 by meena.p

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A strontium atom differs from a strontium ion in that the atom has a greater

asked Jun 15, 2018 by meena.p

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Practical dipole movement of $HCl$ is $1.03D$. If bond length of HCl is $1.275 A^0$ then what will be the percentage of ionic nature in HCl ?

asked Jun 15, 2018 by meena.p

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Most atoms have no net charge because they have....

asked Jun 15, 2018 by meena.p

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Lattice energy of an ionic compounds depends upon

asked Jun 13, 2018 by meena.p

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Ten covalent bonds in the Lewis structure of Propane will account for how many valence electrons?

asked Jun 13, 2018 by meena.p

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$PH_3, So_3,$ and $HF$ are examples of polar molecules. State true or false

asked Jun 13, 2018 by meena.p

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Which one has zero dipole moment?

asked Jun 13, 2018 by meena.p

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The electronegativity difference between the covalently bonded atoms is

asked Jun 13, 2018 by meena.p

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Potassium Ion K+ has the same electronic configuration as that of which noble gases mentioned below ?

asked Jun 13, 2018 by meena.p

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Which among the following is not an example of hydrogen bond?

asked Jun 13, 2018 by meena.p

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When magnesium reacts with oxygen, the nature of bond formed is

asked Jun 13, 2018 by meena.p

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The weak forces of attraction which exists in a molecule like Bromine are called

asked Jun 13, 2018 by meena.p

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Hydrogen chloride reacts with water to give off ions of hydrogen and chloride which are

asked Jun 13, 2018 by meena.p

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One of the four molecules that require the highest bond energy is

asked Jun 13, 2018 by meena.p

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Shape of the molecule is decided by

asked Jun 13, 2018 by meena.p

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Amongst HX, the maximum dipole moment is of

asked Jun 13, 2018 by meena.p

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The correct order of dipole moment is

asked Jun 13, 2018 by meena.p

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The molecule having smallest bond angle is

asked Jun 13, 2018 by meena.p

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