Explore topic-wise InterviewSolutions in .

33. an element X forms atomic mass of 40g/mol having fcc structure has unit cell edge length of 400pm calculate density of X and the number of unit cells in 4g of X?

How to find coordination number of metal atoms(e.g- if asked C.N of Co)??

Why SO2 is a reducing agent whereas SO3 is oxidising agent?

What is the final product in the given reaction?CH3CH2ClKCN−−−→XNi/H2−−−−→Y

What type of solution is blood and lymph are they true solution or colloidal or suspension please explain what type are they

73.Why sigma bond is stronger than pie bond

Rubber made by vulcanization is a material.

Calculate the enthalpy change (△H) of the following reaction 2C2H2(g)+5O2(g)→4CO2(g)+2H2O(g) given average bond enthalpies of various bonds, i.e., C−H,C≡C,O=O,C=O,O−H as 414, 814 499, 724 and 640 kJ mol−1 respectively.

Carbon has zero oxidation number in

At what temperature the RMS velocity of oxygen will be same as that of methane at 27?

what will be product when 1,2dichloroethane is treated with aqueous sodium hydrooxide

The ionic radii (in A∘) of N3−, O2− and F− are respectively:

if carbon containing group is present in the carbon chain when to consider that carbon of functional group and when to not ?

IUPAC nomenclature of

Find the number of bonded and non bonded electrons in water molecule.

Calculate the n factor of the following reactions1) 3Cl2 + 6 OH- ( strong) = ClO3- + 5 Cl- +3 H2O2) 2Na2S2O3 + I2 = Na2S4O6 + 2 NaI

which one of the following sets forms the biodegradable polymers? 1) CH2=CH-CN and CH2=CH-CH-CH=CH2 2) H2N-CH2-COOH and H2N-(CH2)5-COOH 3) OH-Ch2-CH2-OH and HOOC-C6H5-COOH

How Many Isomeric Pentanols give 2-methylbut-2-ene as major product on dehydration ?

At STP 2.8L of a gas weigh 0.5g. The molar mass of gas is

Binding energies of 1H2, 2He4, 26Fe56 and 92U235 nuclei are 2.2 Mev, 28.4 Mev, 492 Mev and 1786 MeV respectively, which one of the following is more stable?

What is chemical potential energy?

Which of the following are states of matter?

minimum carbon required for alkane to show position isomerism:

Examples of antiseptics is/are ___ .

Choose the correct order of stability for the following carbocations.

In which of the following orbitals, nodal plane is absent?

What are the rules we follow while writing electron shell structure & how many electrons can be filled in k,l,m,n shells

The mass of a photon having wavelength 1 nm is:

How is methane molecule formed?

1. If we assume 1/24th part of mass of carbon instead of 1/12th part of it as 1 amu , then mass of 1 mole of a substance will :A) remain changedB) get doubledC) get halvedD)can't be predicted

Why do we get a meso compound on addition of bromine to trans -2-butene rather than enantiomers?

A drop of olive oil of radius 0.25 mm spread into a circular film of radius 10 cm on the water surface. Estimate the molecular size of olive oil.

44.P4+3NaOH+ 3H2O→ PH3+ 3NaH2PO2 The equivalent mass of P4 in the above reaction is(M molecular weight of P4)- •M/3 •M/12 •3M/2 •M

Two oxides of a metal contain 72.4% and 70% of metal respectively. If formula of second oxide is M2O3 find that of first

The solubility product of a salt having general formula MX3, in water is 9×10−12. The concentration (mol L−1) of M3+ ions in the aqueous solution of the salt is:

For the reaction H2CO3→2H+CO3^2- , △ H=6KJ Then find heat change during following balancereaction. H2CO3+2NaOH→ NaCO3+2H2O (1) -106.4 KJ(3)-108.4 KJ(2)-51.2 KJ(4) -114.4 KJ

In O−2, O2 and O2−2 molecular species, the total number of anti-bonding electrons respectively are:

HCN and HNC are _______________ isomers

How is excessive content of CO2 responsible for global warming?

Among the following the paramagnetic compound is

33 An aromatic compound A with molecular formula C7H5N on hydrolysis in presence of acid gives B which reacts with ammonia to give C . C on heating with P2O5 gives A back . Identify A,B,C and give the relevant chemical equations of the reactions.

Calculate the approximate number of unit cells present in 1g of gold . Gold crystallizes in the fcc lattice ?

Generally the conductance is increased in n type semiconductors ,like that only is conductance increased in p type also ?

In the following monobromination reaction, the number of possible chiral product(s) is (are):

29. In nitration of toluene, why para nitro toluene is major than of ortho?

A gas mixture consists of 2 moles of oxygen and 4 moles of Argon at temperature T. Neglecting all vibrational moles, the total internal energy of the system is (a) 4 RT (b) 15 RT (c) 9 RT (d) 11RT

What is the product formed when cyclohexanone undergoes aldol condensation?

Calculate the normality and molarity of 7400 gm of calcium hydroxide in 10 ml of solution?

Which of the following is the most reactive toward electrophilic substitution reaction and why? Give reason. 1) Nitrobenzene 2) Benzene 3)Ethyl benzene 4) Toluene

Which of the following solids will show the given crystal lattice defect?