A to Z Exams

The most abundant group of lipids and animals is

The total pressure of a mixture of 6A of O2 and 5.6 g of N2 present in a 2 litre vessel is 1200 mm. What is the partial pressure (in mm) of nitrogen?

H3O++OH-→2H2O

Meta-phosphoric acid is represented by

Which one of the following equation is correct for the reaction N2(g)+3H2(g)→2NH3(g)

Which of the following is used in the preparation of generated water (soda)

Gold number is used to show

The oxidation states of nitrogen in NH4NO3 is /are

Which of the following is a linear molecule

Hybridisation of oxygen in diethyl ether is

Average C-H bond energy is 416 kJ. mol-1. Which of the following is correct ?

A complex compound of CO3+ with molecular formula COClx. yNH3 gives a total of 3 ions when dissolved in water. How many Cl- ions satisfy both primary and secondary valencies in this complex

The average kinetic energy of one molecule of an ideal gas 270C and 1 atm. pressure is

In the reaction BCl3+PH3→[Cl3B←PH3] the lewis base is

One mole of fluorine is reacted with two moles of hot concentrated KOH. The products formed are KF, H2O and O2. The molar ratio of KF, H2O and O2 respectively is

The equilibrium constant for the reaction H2(g)+I2(g)⇔2HI(g) is 81 at a certain temperature.If the concentrations of H2 and I2 are 3mole.lit each at equilibrium,the equilibrium concentration of HI is

SiCl4 on hydrolysis forms X and HCI. Compound X loses water at 1000oC and gives Y. Compounds X and Y respectively are

Which of the following reactions can produce aniline as main product

Which pair of oxyacids of phosphorous contain ‘P - H' bonds

Which of the following halide does not contain a lone pair of electrons on the central atom

A codon has a sequence of A and specifies a particular B that is to be incorporated into aC What areA, B, C

 Which of the following is not correct

When compound X is oxidised by acidified potassium dichromate, compound Y is formed. Compound Y on reduction with LiAlH4 gives X. X and Y respectively are :

If a solid is dispersed in a liquid the colloid is called

One mole of A and 2 moles of B are allowed to react in a one lit flask. What is the value of Kc if at equilibrium,0.4 moles of C is formed in the reaction A+2B⇔C+2D

The solubility of LiOH in a solution of pH = 8 = is Ksp = 1.8 x 10-12

Which of the following is not correct

Which of the following elements has least number of electrons in its M shell ?

A molecule (X ) has (i) four sigma bonds formed by the overlap of sp2 and s orbitals (ii) one sigma bond formed by sp2 and sp2 orbitals and (iii) one π bond formed by px and pz orbitals. Which of the following is X ?

A gaseous mixture contains 56g of N2,44g of CO2 and 16g of CH4.The total pressure of th mixture is 720 mm Hg.The partial pressure of CH4 is:

In 0.01 M solution,HCN is 0.01% ionized. Its dissociation constant is

A certain sample of gas has a volume of 0.2 litres measured at 1 atm. pressure and 00 C. At the same pressure but at 273 0c. Its volume will be

At 270C the ratio of root mean square velocities of ozone to oxygen is :

Which one of the following compounds liberates CO2 from aqueous NaHCO3

1.5 g of CdCl2 was found to contain 0.9 g of Cd. Calculate the Atomic weight of Cd

Bauxite is boiled with aqueous NaOH solution. Sodium meta aluminate solution is formed. This part in the metallurgy of aluminium is called

The IUPAC name of an unsymmetrical ether with the molecular formula C4H10O:

The following are some statements related to VA group hydrides,I . Reducing  property increases from NH3 to BiH3.II..Tendency to donate lone pair decreases from NH3 to BiH3III.Thermal stability of hydrides decreases from NH3 to BiH3.IV. Bond angle of hydrides decreases from NH3 to BiH3.The correct statements are

Identify the reaction for which ΔH ≠ ΔE :

On passing a current through molten KCl 19.5 of K is deposited. The amount of aluminium deposited by the same quantity of electricity if passed through molten AlCl3 is

Aqueous solution of an organic compound, 'A' on electrolysis liberates acetylene and CO2 at anode. 'A' is

What is the correct order of occurrence (% by weight) in air of Ne, Ar and Kr ?

Among  the following, which is water insoluble

Anhydrous Magnesium chloride can be prepared by heating MgCl26H2O

The hydrolysis constant Kh of a salt of NaOH and a weak acid (HX) If the Ka of the acid is Ka=2x10-6

At 270C the Kp value for the reaction PCl5(g)⇔PCl3(g)+Cl2(g).is 0.65.Its Kc is

The element that can exhibit highest number of oxidation states amongst the following:

For the estimation of sulphur by Carius method, the organic compound is heated in Carius tube with

The solubility of the impurities in the metal in molten and solid states is different. The principle involved in the refining of metal is

Which of the following is an endothermic reaction ?

The charge required to reduce 1 mole Cr2O7-2 to Cr+3 ions is

A and B are ideal gases. The molecular weights of A and B are in the ratio of 1 : 4. The pressure of a gas mixture containing equal weights of A and B is P atm. What is the partial pressure (in atm) of B in the mixture ?

In the reaction AlCl3+Cl-→AlCl4-, AlCl3 is

Which of the following functional group shows +R effect

Three faradays of electricity are passed through molten Al2O3, aqueous solution of CuSO4 and molten NaCl taken in three different electrolytic cells. The amount of Al,Cu and Na deposited at the cathodes will be in the ratio of

An electron is moving in Bohr's fourth orbit. Its de-Broglie wave length is X. What is the circumference of the fourth orbit

At T (K), 100 L of dry oxygen is present in a sealed container. It is subjected to silent electric discharge, till the volumes of oxygen and ozone become equal. What is the volume (in litres) of ozone formed at T (K)?

Carbogen to

Bhopal gas tragedy of 1984 was caused by

The first organic compound synthesized in the laboratory from an inorganic compound is:

x grams of water is mixed in 69 g of ethanol. Mole fraction of ethanol in the resultant solution is 0.6. What is the value of x in grams ?

The degree of dissociation of an acid HA in 0.1 M solution is 0.1%. Its dissociation constant is ;

A sample of gas has a volume of 0.2 lit. measured at 1 atm. pressure and 00C. At the same pressure, but at 2730C its volume will become

Which one of the following compounds in aqueous solution gives a white precipitate with perichloric acid ?

Which of the following converts acetic acid into acetyl chloride

The time for half life of a first order reaction is 1 hour. What is the time taken for 87.5% completion of the reaction

Which of the following is not correct

For a given reaction which one is higher than the rest among the following

The experimental data for the reaction 2NO(g)+Cl2(g)→2NOCl(g) are given below Expt [Cl2] [NO] Initial rate 1 0.020 0.010 2.4x10-4 2 0.020 0.030 2.16x10-3 3 0.040 0.030 4.32x10-3 What is the order of the reaction

The half-life period of a radioactive element is 120 days. After 480 days 4.0 gm of the element will be reduced to (.....) gms.

The bonds in K4Fe(CN)6 are:

What is the hybridization state of the central atom in the conjugate acid of NH3?

9.2 grams of N2O4(g) is taken one liter vessel and heated till the following equilibrium is reached N2O4 (g)⇔2NO2(g).At equilibrium 50% of N2O4(g) is dissociated.The value of Kc is

When aniline is treated with CHCI3 and KOH, the product is :

Which of the following is not correct

One atom of 3919K contains:

Which of the following is a favourable factor for cation formation

A system absorbs 10kJ of heat and does 4kJ of work. The internal energy of the system

In which of the following cases, the reaction is spontaneous at all temperatures

75 ml of 0.2 M HCl is mixed with 25 ml of 1 M HCl. To this solution, 300 ml of distilled water is added. What is the pH of the resultant solution

The half-life period of a radioactive substance is 150 days. Starting with an initial quantity of 1 mg of the substance the fraction of that has disintegrated in 600 days is

In the extraction of copper, the slag formed in the blast furnace

The molar capacity(Cp)of water at constant pressure is 75 J.K-1.mol-1.The increase in temperature (in K) of 100 g of water when 1 K.J. of heat is supplied to it is

The conjugate acid of NH2- ion is:

Conjugate base of H2SO4 is

The molar conductance of HCl,NaCl and CH3COONa are 426,126 and 91Ω-1cm2mol-1 Respectively. The molar conductance for CH3COOH is

The gas that is used for sterilizing water is

While phosphorus form PCl5, nitrogen does not form NCl5 because

In Fischer-Ringe's method of separation of nobles gas mixture, from air is used

Which of the following is obtained in carbyl amine reaction from aniline

In which of the following reactions the product is an ether

Order of boiling points

The quantum number which explains the line spectra observed as doublets in case of hydrogen and alkali metals and doublets and triplets in case of alkaline earth metals is

The type of bonds present in sulphuric anhydride

Sodium is heated in air at 3000C to form X. X absorbs CO2 and forms Na2CO3 and Y. Which of the following is Y

Ethyl chloride reacts with sodium ethoxide to form a compound A. Which of the following reactions also yields A ?

Assertion (A) : A current of 96.5 A is passed into aqueous AgNO3 solution for 100 s. The weight of silver deposited is 10.8 g (At. wt. of Ag = 108)Reason (R) : The mass of a substance deposited during the electrolysis of an electrolyte is inversely proportional to the quantity of electricity passing through the electrolyte.The correct answer is :

Which of the following compounds when heated with CO at 150"C and 500 atm pressure in presence of BF3 forms ethyl propionate ?

Assertion (A) : Equal moles of different substances contain same number of constituent particles.Reason (R) : Equal weights of different substances contain the same number of constituent particles.The correct answer is

pH of a buffer solution decreases by 0.02 units when 0.12 g of acetic acid is added to 250 ml of a buffer solution of acetic acid and Potassium acetate at 270C. The buffer capacity of the solution is