Recent questions in JEEMAIN-2014

In electro chemical corrosion of metals undergoing corrosion

asked Apr 16, 2015 by meena.p

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In electro chemical corrosion of metals undergoing corrosion

asked Apr 16, 2015 by meena.p

1 answer

Sodium nitroprusside when added to an alkaline solution of sulphide cons produces a

asked Apr 16, 2015 by meena.p

1 answer

The hybrdisation of carbon in diamond graphite and acetyline is in the order of

asked Apr 16, 2015 by meena.p

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Which alloy contains Mg as one of the constituents

asked Apr 16, 2015 by meena.p

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The bond distance between $C-Cl$ in $Ccl_4$ is $1.76\;A^{\circ}$ . If the atomic radius of $Cl$ is $C$ is $0.77 A^{\circ}$ . The atomic radius of $cl$ is

asked Apr 16, 2015 by meena.p

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The first conization energy in electron volts of nitrogen and oxygen atom's are respectively given by

asked Apr 15, 2015 by meena.p

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On heating sodium metal in a current of dry ammonia, the compound formed is

asked Apr 15, 2015 by meena.p

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Oxidation number of codine in the following reaction $IO_3^{-1} +HI \to H_2O +I_2$

asked Apr 15, 2015 by meena.p

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When a vapour , at atmospheric pressure was gradually heated from $25^{\circ}$ its colour was found to deepen at first and then to fade as the temperature was raised above $160^{\circ}$ . At $6000^{\circ}$ the vapour was almost colourless , but its colour deepens when the pressure was raised at this temperature , the vapour was

asked Apr 15, 2015 by meena.p

1 answer

A Substance $A_xB_y$ crystallizes in a face centered cubic (FCC) lattice in which 'A' atoms occupy each corner of the cube and 'B' atoms occupy the centers of each face of the cube , Identify the correct composition of the substance $A_xB_y$

asked Apr 15, 2015 by meena.p

1 answer

Fluoxne is better oxidising agent than $Br_2$ . It is due to

asked Apr 15, 2015 by meena.p

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The solubility product of silver chlorides is $1.5625 \times 10^{-10}$ at $25^{\circ}C$ . Find its solubility in $gL^{-1}$

asked Apr 15, 2015 by meena.p

1 answer

Which of the following reacts with water at high rate?

asked Apr 15, 2015 by meena.p

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A first order reaction has a rate constant of $15 \times 10^{-3}S^{-1}$ . How long will $5.0 \;g$ of this reactant take to reduce to $3.0 \;g$ ?

asked Apr 15, 2015 by meena.p

1 answer

Which of the following show aromatic character ?

asked Apr 15, 2015 by meena.p

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In the metallurgy of iron, when lime stone is added to the blast furnace, the calcium ion ends up in

asked Apr 15, 2015 by meena.p

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Calculate the maximum work done in expanding $16\;g$ of oxygen at $300\;k$ and occupying a volume of $5dm^3$ isothermally until the volume become $25\;dm^3$

asked Apr 15, 2015 by meena.p

1 answer

What is the oxidation number of sulphere in $Na_2S_4O_6$

asked Apr 15, 2015 by meena.p

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The atomic weight of an element is $23$ and atomic number is 11. The number of protons , electrons and neutron respectively present in the atom of the element are

asked Apr 15, 2015 by meena.p

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Which of the following complex will give white precipitate with $BaCl_2(aq)$

asked Apr 15, 2015 by meena.p

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Duraluminium is an alloy of

asked Apr 15, 2015 by meena.p

1 answer

A $5 \%$ solution of cane sugar is isotonic with $0.877 \%$ solution of urea. Calculate the molecular mass of urea if the molecular mass of cane sugar is $342$

asked Apr 13, 2015 by meena.p

1 answer

The value of conic product of water at $393\;K$ is

asked Apr 13, 2015 by meena.p

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On dissolving moderate amount of sodium metal in liquid $NH_3$ at low temperature , Which of the following does not occur ?

asked Apr 13, 2015 by meena.p

1 answer

In Zerewiitinoff's method Grignard 's reagent react with the following

asked Apr 13, 2015 by meena.p

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A sample of a gas occupies a volume of $512 \;mL$ at $20^{\circ}$ and $74\;cm$ of Hg as pressure. what volume would this gas occupy at $STP$ ?

asked Apr 13, 2015 by meena.p

1 answer

The main intermediate formed in the reaction of propene with $HBr$ in presence of peroxide is

asked Apr 13, 2015 by meena.p

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Which of the following has largest de broglie wave length given that all have equal velocity ?

asked Apr 13, 2015 by meena.p

1 answer

The halide which is not hydrolysed is

asked Apr 13, 2015 by meena.p

1 answer

Which of the following is a true statement.

asked Apr 13, 2015 by meena.p

1 answer

2,3 Dibromobutane, when heated with zinc dust yields.

asked Apr 13, 2015 by meena.p

1 answer

The ratio of e/m for a cathode ray

asked Apr 13, 2015 by meena.p

1 answer

Sodium niytrate decomposes above $800^{\circ}$ to give

asked Apr 13, 2015 by meena.p

1 answer

Pressure cooker reduces cooking time because

asked Apr 13, 2015 by meena.p

1 answer

Hypo phosphorus acid is

asked Apr 13, 2015 by meena.p

1 answer

In the heterogenous equilibrium $CaCO_3 (s) \rightleftharpoons CacO_3 +CO_2 (g)$ What would be the effect of addition of $CaCO_3$ on the equilibrium concentration of $CO_2$ ?

asked Apr 13, 2015 by meena.p

1 answer

A combustible gas is liberated when caustic soda solution is heated with

asked Apr 13, 2015 by meena.p

1 answer

For the preparation of 2- propanol methyl magnesium chloride will react with the following reagent

asked Apr 12, 2015 by meena.p

1 answer

An electric current of 100 ampere is passed through a molten liquid of sodium chloxde for 5 hours . Calculate the volume of chlorine gas liberated at the electrode at $NTP$

asked Apr 12, 2015 by meena.p

1 answer

Ozonolysis of benzene yield

asked Apr 12, 2015 by meena.p

1 answer

When $CO$ is passed over solid $NaOH$ heat to $200^{\circ}$ , it forms

asked Apr 10, 2015 by meena.p

1 answer

The salt which produces blue colour i borax bead test is

asked Apr 10, 2015 by meena.p

1 answer

The vapour density of $N_2O_4$ at a certain temperature is $30$ . Calculate the percentage dissociation of $N_2O_4$ at this temperature $N_2O_4 (g) \leftrightarrow 2NO_2(g)$

asked Apr 10, 2015 by meena.p

1 answer

Paraffins is the common name used for

asked Apr 10, 2015 by meena.p

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$200\;cm^3$ of an aqueous solution contains $1.26 \;g$ a polymer. The osmotic pressure of such solution at $300\;k$ is found to be mass of the polymer.

asked Apr 10, 2015 by meena.p

1 answer

Which one of the following cons exhibits colour in aqueous solution

asked Apr 10, 2015 by meena.p

1 answer

The number and type of bonds between two carbon atoms in $CaC_2$ are

asked Apr 10, 2015 by meena.p

1 answer

The element with highest density is

asked Apr 10, 2015 by meena.p

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Find the temperature at which 3 moles of $SO_2$ will occupy a volume of 10 litre at a pressure of $15\;atm\;\qquad a= 6.71\;atm \;liter^2\;mol^{-1}\; ;b= 0.0564 \;liters\;mol^{-1}$

asked Apr 10, 2015 by meena.p

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