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In a solid atom M occupies ccp lattice and ((1)/(3)) of tetrahedral voids are occupied by atom N, find the formula of solid formed by M and N .

In a solid AB of NaCl structure, A atoms occupy the corners of the cubic unit cell. If all the corner atoms are removed then the formula of the unit cell will be:

In a solid AB having the NaCl structure, A atom occupies the corners of the cubic unit cell. If all the face-centred atoms along one of the axes are removed, then the resultant stoichiometry of the solid is

In a solid AB having the NaCZ structure. ‘A’ atoms occupy the corners of the cubic unit cell. If all the edge-centred atoms along one of the axes are removed, then the resultant stoichiometry of the solid is

In a solid (AB) having rock salt type structure all the atoms along body diagonal plane are removed the formula of the remaining unit cell will be

In a solid 'AB' having NaCl structure, 'A' atoms occupy the corners of the cubic unit cell. If all the face-centred atoms along one of the axes are removed,then the resultant stiochiometry of the solid is

In a sodium chloride crystal, each chloride ion is surrounded by

In a sodium chloride crystal, each chloride ion is surrounded by:

IN a sodium chloride crystal, each chloride ion is surrounded by :

In a S_(N)2 substitution reaction of the type R-Br+Cl^(-) overset(DMF)to R-Cl+Br^(-) which one of the following has thehighest relative rate?

In a simple Galvanic cell , which is in standard state, half cell reactions with their appropriate oxidation potentials are {:(Pb (s) - 2e^(-) to Pb^(2+) (aq) E^(@) = +0.13 "volt") , (Ag (s) - e^(-) to Ag^(2+) (aq) E^(@) = - 0.80 "volt"):} Which of the following reaction takes place ?

In a S_(N)2 substitution reaction of the type R-Br+Cl^(-)overset(DMF)rarr R-Cl+Br^(-)which one of the following has the highest relative rate ?

In a single isolated atomof hydrogen electron make transition from4^(th)excited state to grond state producingmaximumpossible number of wavelengthsif the 2^(nd)lowest energy of theselinesis used to further excite an already excitedsample of Li^(2+)ion then transition will be

In a S_(N)^(1) reaction on chiral centres, there is

In a simple cubic crystal, the corner atom touches

In a simple cubic crystal, each atom is shared by

In a simple cubic cell, the number of atoms present :

In a simple cubic cell, each atom on a corner is shared by:

In a set of the given reactions, acetic acid yielded a product iC. CH_(3)COOH+PCl_(5) to A overset(C_(6)H_(6))underset(Anh. AlCl_(3))toB overset(C_(2)H_(5)MgBr)underset("ether")toC Product C would be

In a set of reactions, propionic acid yielded a compound D underset((A))(CH_(3)CH_(2)COOH) overset(SOCl_(2))(rarr) B overset(NH_(3))(rarr) C overset(Br_(2)//KOH)(rarr) D The structure of D would be

In a set of the given reactions, acetic acid yielded a product C. CH_3COOH + PCl_5 to A underset(Anh. AlCl_3)overset(C_6H_6)to B underset"Ether " overset(C_2H_5MgBr)to C Product C would be

In a set of reactions propionic acid yielded compound D, CH_(3)CH_(2)COOHoverset(SOCl_(2))toBoverset(NH_(3))toCunderset(Br_(2))overset(KOH)toDThe structure of D would be :

In a set of reactions acetic acid yields a product [D] The structures of [D] would be: CH_(3)COOHoverset(SOCl_(2))to[A]overset(C_(6)H_(5))underset(Anhy. AlCl_(3))to[B] overset(HCN)to[C]overset(HOH)to[D]

In a set of reactions, ethyl benzene yielded a product D. 'D' would be :

In a set of reactions p- nitrotoluene yielded a produce E The product E would be

In a set of reactions, ethyl benzene yielded a product D. 'D' would be :

In a set of degenerate orbitals, the electrons distribute themselves to retain like spins as far as possible. The statement is attributed to

In a set of reaction, m bromobenzoic acid gave a product D. Identify the product D.

In a set of reaction, ethyl benzene yielded a product D. The product D would be

In a set of reactions, acetic acid yielded a product D. The structure of D would be :

in aset of degenerate orbitals the electrons distribute themselves to retailsimilar spins as far as possible. This statement is attributed to

In a secondary cell ,

In a second order reaction, if one of the concentration is excess, the order of the reaction is ________ order reaction.

In a saturated solution of the sparingly soluble strong electrolyte AglO_(3) (s) hArr Ag^(+)(aq)+IO_(3)^(-)(aq). If the solubility product constant K_(sp) " of " AgIO_(3) at a given temperature is 1.0xx10^(-8), what is the mass of AgIO_(3) contained in 100 ml of its saturated solution ?

In a saturated solution of electrolyte, the ionic product of their concentration are constant at constant temperature and this constant for electrolyte is known as

In a saturated solution of calcium phosphate, the concentration of PO_(4)^(3-) ions is 3.3xx10^(-7)M. The K_(sp) of Ca_(3)(PO_(4))_(2) will be :

In a sample of wood, the reading of a counter is 32 dpm and in a fresh sample of tree it is 122dpm . Due to error counter gives the reading 2 dpm in absence of .^(14)C . Half life of .^(14)C is 5770 years . The approximate age (in years) of wood sample is :

In a sample of pitchblende the ratio of ""^(206)Pb, ""^(238)U= 0.2: 1 by weight. If the disintegration constant of ""^(238)U " is " 1.54 xx 10^(-10) per year and all Pb is supposed to be originated from uranium, what will be the age of the mineral?

In a sample of pitchblende the atomic ratio is ""^(206)Pb, ""^(238)U= 0.23: 1. Calculate the age of the mineral, if half-life of uranium is taken as 4.5 xx 10^(9) years. All lead originated from uranium.

In a sample of H-atom if only 3 atoms are present and all are in 6th excited state then maximum possible photons of different wavelengths are

In a sample of H-atom electrons make transition from 5^(th) excited state to ground state, producing all possible types of photons, then number of lines in infrared region are

In a salt bridge,KCI is used because:

In a salt bridge KCl is used because

In a reversible reaction two substances are in equilibrium. If the concentration of each is double the equilibrium is:

in areversible reactiontheenergyofactivationof theforwardreactionis 50 kcal . the energyof activationfor thereverse reaction will be

In a reversible reaction , the enthalpy change and the activation energy in the forward direction are respectively -x kJ mol^(-1) and y kJ mol^(-1) is

In a reversible reaction, the enthalpy change and the activation energy in the forward direction are respectively -xkJmol and y kJ mol ^(-1) . Therefore , the energy of activation in the backward direction is ........