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How many maximum spectral lines are possible if electron is present in 4th shell and only 2 atoms are present in sample ? 6 4 3 2

Anisole on cleavage with HI gives:

A 5M solution of H2SO4 is diluted from 1 litre to a volume of 100 litres; the normality of the solution will be

Food irradiation is used to

The hybridisation of 'N' in N(SiHis(2) sp23(1) sp3(4) spod(3) sp

16 Four mole of a mixture of mohrs salt and Fe2(SO4)3/requires 500ml of 1N K2Cr2O7 for complete oxidation in acidic medium. The mole % of mohrs salt in mixture is A(25 B)50 C)60 D)75

Define Surface Tension.

the effective atomic number of Fe in Fe_2(CO)_9 is

An electric discharge is passed through a mixture containing 50 c.c. of O2 and 50 c.c. of H2. The volume of the gases formed (i) at room temperature and (ii) at 1100C will be

The correct order of stability for the following species is: B2, B−2 and B+2

24. 200ml of an aqueous solution of a protein contains it's 1.26g.The osmotic pressure of this solution at 300K is found to be 2.57×10-3bar. The molar mass of protein will be (R=0.083Lbar mol-1 K-1) 1. 31011 g mol-1 2. 61038 g mol-1 3. 51022 g mol-1 4. 122044 g mol-1

12.Is phenol and benzyl phenol aromatic?

The number of hydroxyl group in Q is:

In the rusting of Iron, which of the following reaction occurs at cathode?

why there is the need of representing organic molecules in three dimensional form

The temperature of reservoir of Carnot's engine operating with an efficiency of 70% is 1000K. The temperature of its sink is

Calculate the radius of He atoms if its the Van der Waals constant 'b' is 271 mL.mol−1. (Take NA=6×1023)

The product of the given compound undergoing pinacol-pinacolone rearrangement is

CH3CH2CH3400−600∘C−−−−−−−→X+Y X and Y are

Why Teichoic acid present only in gram positive bacteria and not gram negative bacteria?

39. If acetaldehyde and propanaldehyde are reacted through aldolcondensation then whichone will generate nucleophile for major product and why??

Incorrect order of basic strength of amines in aqueous state

When a poly hydroxy alcohol reacts with excess acetyl chloride , the molecular weight of the alcohol increases by 210 unit . '-OH' group present in the compound -A) 3B) 4C) 5D) 6

The % of N in urea is:

Liquids A and B form an ideal solution in the entire compositon range. At 350 K, the vapor pressures of pure A and pure B are 7×103 Pa and 12×103 Pa, respectively. The composition of the vapor in equilibrium with a solution containing 40 mole percent of A at this temperature is:

Apart from carbon, the popular non-stick polymer coating Teflon contains:

Sulphides ores are generally concentrated by

Both alkane and alkene can be prepared from in one step reaction

Can we use the jugaad that sir has given to us to all the compounds that 5 degree subtracted two lone pair and 2.5 degree when one lone pair is present

On heating with concetrated NaOH solution in an inert atmosphere of CO2, white phospherous gives a gas. Which of the following statement is incorrect about the gas?

A aqueous solution consisting 0.5 g KCl in 100 mL water was found to freeze at −0.24∘C . Find the van't Hoff factor and degree of dissociation of the solute respectively. Given :(Kf)water=1.86K kg mol−1ρwater=1 g mL−1

The following molecule is present in DNA without "- NH2 "group

The decreasing order of reactivity of alkyl halides with zinc and dilute HCl is :

The number of sigma and pi bonds present in inorganic benzene are respectively

In 0.1 m aqueous solution of urea, the mole fraction of urea is

The key step in cannizzaro’s reaction is the intermolecular shift of:

What is the formula to find out instantaneous rate of reaction?

Value of dissociation constant of acetic acid is 10−6, where as dissociation constant of formic acid is 10−5. Which of the following will be the value of pKa(acetic acid) - pKa(formic acid) a)10 b)1 c)10−1 d)-1

NACL FORMS AN IONIC CRYSTAL IN WHICH CL- IONS FORM CCP LATTICE . THE NO OF NA+ IONS PRESENT AT A DISTANCE OF ROOT 5/2 A FROM CL- ION AT THE CORNER IS [HERE A IS THE EDGE LENGTH OF CRYSTALS]

A sample of ammonium phosphate (NH4)3PO4 contains 3.18 moles of oxygen atoms the number of moles of oxygen atoms in the sample is

nta chemical reaction A TO B rate of reaction doubleswhen concof A incresed 8 times.order of reaction w.r.t AIS?n

In N2- there are 15 electrons then which type of eletronic configuration will be used for it.

How many unit cells are present in 39g of potassium that crystallizes in a BCC structure I don't understand the method of solution???

for h2 gas cp-cv=a and for o2 gas cp-cv=b,so the relation between a and b is and what does cp and cv represent.

What is the equivalent mass of H2SO4 for the given reaction?(Molar mass is given as ‘M’)H2SO4+NaOH→NaHSO4+H2O

What is meant by mononuclear complex in coordination chemistry distinguish betweeen mono and di and hetero nuclear complexes

How does colligative properties help to determine the abnormal molecular mass?

Why noble gases are non-reactive?

If a reversed Carnot cycle operates between the temperature limits of 27∘C and −3∘C, then the ratio of the COP of a refrigerator to that of a heat pump (COP of refrigerator/COP of heat pump) based on the cycle is (round off to 2 decimal places).

To an evacuated vessel with movable piston under total pressure of 1 atm, 0.1 mol of He and 1.0 mol of an unknown compound (vapour pressure = 0.68 atm at 0∘C) are introduced. Considering the ideal gas behaviour, the total volume (in litre) of the gases at 0∘C is close to (nearest integer)