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Questions >> JEEMAIN and NEET >> Chemistry

Chemistry

Rank the elements in each of the following sets in order of decreasing First Ionization Energy IE $_1$ : K, Ca, Rb

asked Jul 23, 2014 by balaji.thirumalai

1 answer

Rank the elements in each of the following sets in order of decreasing First Ionization Energy IE $_1$ : Sb, Te, Sn

asked Jul 23, 2014 by balaji.thirumalai

1 answer

Rank the elements in each of the following sets in order of decreasing First Ionization Energy IE $_1$ : Kr, He, Ar

asked Jul 23, 2014 by balaji.thirumalai

1 answer

Rank the set of main group elements in order of decreasing atomic size: $Sr, Ca, Rb$

asked Jul 23, 2014 by balaji.thirumalai

1 answer

Rank the set of main group elements in order of decreasing atomic size: $Br, Rb, Kr$

asked Jul 23, 2014 by balaji.thirumalai

1 answer

Rank the set of main group elements in order of decreasing atomic size: $K, Ga, Ca$

asked Jul 23, 2014 by balaji.thirumalai

1 answer

Rank the set of main group elements in order of decreasing atomic size: $Ca, Mg, Sr$

asked Jul 23, 2014 by balaji.thirumalai

1 answer

The structure of $SF_4$ is

asked Jul 23, 2014 by sreemathi.v

1 answer

Sulphur trioxide exists

asked Jul 23, 2014 by sreemathi.v

1 answer

Which of the following compounds undergoes hydrolysis?

asked Jul 23, 2014 by sreemathi.v

1 answer

Which of the following statements is not correct?

asked Jul 23, 2014 by sreemathi.v

1 answer

Which of the following hydrides of Group 16 has the lowest boiling point?

asked Jul 23, 2014 by sreemathi.v

1 answer

Which of the following triatomic molecules does not exist?

asked Jul 23, 2014 by sreemathi.v

1 answer

Atomic number of tellurium which belongs to 5th period is

asked Jul 23, 2014 by sreemathi.v

1 answer

Which of the following elements does not belongs to Group 16?

asked Jul 23, 2014 by sreemathi.v

1 answer

A dilute aqueous solution of $Na_2SO_4$ is electrolysed using platinum electrodes.The products at the anode and cathode are

asked Jul 23, 2014 by sreemathi.v

1 answer

Of the following,the metals that cannot be obtained by electrolysis of the aqueous solution of their salts are

asked Jul 23, 2014 by sreemathi.v

1 answer

Which of the following does not evolve oxygen at anode when the electrolysis is carried out of

asked Jul 23, 2014 by sreemathi.v

1 answer

In acidic medium, $MnO_4^-$ is converted to $Mn^{2+}$ when acts as an oxidizing agent.The quantity of electricity required to reduce 0.05 mol of $MnO_4^-$ would be

asked Jul 23, 2014 by sreemathi.v

1 answer

In an electrolysis of a metallic chloride 3.283 g of the metal (molar mass $197gmol^{-1}$ ) was deposited on the cathode by the passage of 4825C of electric charge.The charge number of metal ion is

asked Jul 23, 2014 by sreemathi.v

1 answer

In the electrolysis of alkaline water,a total of 1 mol of gases is evolved.The amount of water decomposed would be

asked Jul 23, 2014 by sreemathi.v

1 answer

The reaction occuring at anode when the electrolysis of $CuSO_4$ is done using Pt electrode,is

asked Jul 23, 2014 by sreemathi.v

1 answer

On passing an electric current,the quantity of deposition of a metal on cathode depends on the

asked Jul 23, 2014 by sreemathi.v

1 answer

In the electrolysis of $CuCl_2$ solution using copper electrode,if 2.5g of Cu is deposited at cathode,then at anode

asked Jul 23, 2014 by sreemathi.v

1 answer

In an electrolysis of an aqueous solution of sodium sulphate,2.4L of oxygen at STP was liberated at anode.The volume of hydrogen at STP liberated at cathode would be

asked Jul 23, 2014 by sreemathi.v

1 answer

When a lead storage cell is charged

asked Jul 23, 2014 by sreemathi.v

1 answer

The time required to coat a metal surface of $80cm^2$ with $5\times 10^{-3}$ cm thick layer of silver (density $10.5gcm^{-3})$ with the passage of 3A current through a silver nitrate solution is

asked Jul 23, 2014 by sreemathi.v

1 answer

A current of $9.65A$ is passed for 3h between nickel electrodes in 0.5L of a 2M solution of $Ni(NO_3)_2$ .The molarity of solution after electrolysis would be

asked Jul 23, 2014 by sreemathi.v

1 answer

The density of Cu is $8.94gcm^{-3}$ .The quantity of electricity needed to plate an area 10 cm $\times$ 10 cm to a thickness of $10^{-2}$ cm using $CuSO_4$ solution is

asked Jul 23, 2014 by sreemathi.v

1 answer

In an electrolytic cell,which of the facts is not true?

asked Jul 23, 2014 by sreemathi.v

1 answer

Which of the following expressions regarding the electrolysis of an electrolytic solution is represented correctly?

asked Jul 23, 2014 by sreemathi.v

1 answer

Which of the following expressions is written correctly?

asked Jul 23, 2014 by sreemathi.v

1 answer

When a lead storage battery is discharged

asked Jul 23, 2014 by sreemathi.v

1 answer

A solution of sodium sulphate in water is electrolysed using inert electrodes.The products at the cathode and anode are respectively

asked Jul 23, 2014 by sreemathi.v

1 answer

Faraday's law of electrolysis are related to the

asked Jul 23, 2014 by sreemathi.v

1 answer

Molten sodium chloride conducts electricity due to the presence of

asked Jul 23, 2014 by sreemathi.v

1 answer

The Henry's law constant for the solubility of $N_2$ gas in water is $1.0\times 10^5$ atm.The mole fraction of $N_2$ in air is 0.8.The amount of $N_2$ from air dissolved in 10mol of water at 298K and 5 atm pressure is

asked Jul 23, 2014 by sreemathi.v

1 answer

Twenty grams of hemoglobin in 1L solution at 300K is separated from pure water by a semipermeable.At equilibrium,the height of solution (density $1gcm^{-3}$ ) in a tube dipped in solution is found to be 83.1mm higher than in the tube dipped in water.If $g=10ms^{-2}$ ,the molar mass of hemoglobin is about

asked Jul 23, 2014 by sreemathi.v

1 answer

A solution containing $8.6gL^{-1}$ of urea (molar mass $60gmol^{-1}$ ) is isotonic with a 5% solution of unknown solute.The molar mass of the solute will be

asked Jul 23, 2014 by sreemathi.v

1 answer

The molar mass of sodium chloride determined by osmotic pressure would be

asked Jul 23, 2014 by sreemathi.v

1 answer

The freezing point of a solution containing 36g of a compound (empirical formula : $CH_2O$ ) in 1.20 kg of water is found to be $-0.93^{\large\circ}C$ .The molecular formula of the solute is

asked Jul 23, 2014 by sreemathi.v

1 answer

A solution contains 10g of a solute and 116g of acetone at $30^{\large\circ}$ C.Its vapour pressure is 290 Torr.If the vapour pressure of pure acetone is 300 Torr at $30^{\large\circ}$ C,the molar mass of solute is

asked Jul 22, 2014 by sreemathi.v

1 answer

The vapour pressure of a pure liquid A is 10.0 Torr at $27^{\large\circ}C$ ,One gram of B is dissolved in 20g of A,the vapour pressure is lowered to 90 Torr.If the molar mass of A is $200gmol^{-1}$ ,the molar mass of B is

asked Jul 22, 2014 by sreemathi.v

1 answer

The vapour pressure of a solution of 5g of a nonelectrolyte in 100g water at a particular temperature is 2950 Pa and that of pure water at the same temperature is 3000 Pa.The molar mass of the solute is

asked Jul 22, 2014 by sreemathi.v

1 answer

The vapour pressure of a solution having 2.0g of a solute X(molar mass $32gmol^{-1}$ ) in 100g of $CS_2$ (vapour pressure 854 Torr) is 848.9 Torr.The molecular formula of the solute is

asked Jul 22, 2014 by sreemathi.v

1 answer

The molar mass of benzoic acid in benzene as determined by depression in freezing point method corresponds to

asked Jul 22, 2014 by sreemathi.v

1 answer

The vapour pressure of a pure liquid A is 80 mmHg at 300K.It forms an ideal solution with liquid B.When the mole fraction of B is 0.4,the total pressure was found to be 88 mmHg.The vapour pressure of liquid A would be

asked Jul 22, 2014 by sreemathi.v

1 answer

A binary solution contains 4 mol of A and 6 mol of B.Its vapour pressure is found to be 460mm Hg.To this solution,when 10 mol of B is added,its vapour pressure becomes 480mm Hg.The vapour pressures of pure A and pure B,respectively,are

asked Jul 22, 2014 by sreemathi.v

1 answer

The vapour pressure of n-hexane and n-heptane are 46 and 13mm Hg.If the vapour pressure of a solution of these two liquids is 38mmHg,the mole fraction of n-hexane in solution is

asked Jul 22, 2014 by sreemathi.v

1 answer

The vapour pressure of pure benzene and toluence are 160 Torr and 60 Torr,respectively.The mole fraction of benzene in vapour phase in contact with equimolar solution of benzene and toluene would be

asked Jul 22, 2014 by sreemathi.v

1 answer

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