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Calculate the maximum kinetic energy of photoelectrons emitted when a light of frequency 2×1016Hz is irradiated on a metal surface with threshold frequency v0 equal to 8.68×1015Hz

Solid A is a very hard electrical insulator in solid as well as in molten state and melts at extremely high temperature. What type of solid is it?

Predict the product

Which one of the following has the highest dipole moment? (i)CH3CI2 (ii) CHCl3 (iii) CCI4

An aqueous solution of a substance gives a white precipitate on treatment with dil HCl, which dissolved on heating. On passing H2S in hot acidic solution a black precipitate is formed. The substance is:

if E is the energy density in an ideal gas then the pressure of the ideal gas i

A sample of ferrous oxide has actual formula Fe0.93 O1.00 In this sample, what fraction of metal ions are Fe2+ ions ? What type of non-stoichiometry defect is present in this sample?

H3PO4 IS A TRIBASIC ACID AND ONE OF ITS SALT IS NaH2PO4.WHAT VOLUME OF 1M NaOH SHOULD BE ADDED TO 12g NAH2PO4 TO CONVERT IT INTO NA3PO4? 1)100mL 2)200ml 3)80mL 4)300m

Which of the following properties of elements - Cl,Br,andI increase(s) with the increase in atomic number?

why 1s electron level allaws hydrogen to absorb a photon but not emit a photon?

Easy trick for resonance and to draw resonating structure.

What are emulsion ? What are their different types ? Give example of each type.

What is heavy metals

8. in which of the following defects, the stoichiometry of the crystal is disturbed? a)Metal excess defect b)Impurity defect c)Schottky defect d)Both (1) & (2)

Element 'B ' forms ccpstructure and 'A ' occupies half of the octahedral voids, while oxygen atoms occupy all the tetrahedral voids. The structure of bimetallic oxide is:

Select the correct solid whose Solubility decreases with increase in temperature A. Li2SO4 B. Agno3 C. NANO3 D. NH4Cl

What will be the sum of pH and pOH​ in an aqueous solution?

If arg(z)&lt;0, then arg(−z)−arg(z) equals

in which of the following resonance is not present:- (1) HF2^-1 (2)CO2 (3) SiO2 (4) all of these

What will be the volume of water which should be added to 300 mL of 0.5M NaoH solution so as to get a solution of 0.2M?

21. Reaction of 1-bromocyclohepta2,4,6triene with Silver nitrate gives what?

I need to get a brief explanation on the phenomenon of back bonding in a lucid manner with examples.. Please

A mixture contains 1 mode of helium Cp = 2.5 R, Cv = 1.5 R) and 1 a mole of hydrigen (Cp = 3.5 R, Cv = 2.5 R) Calculate the values of Cp Cv Calculate the values of Cp Cv and γ for the mixture.

BeH_2 is ionic or covalent hydrid

The equilibrium constant for a reaction is 10. What will be the value of Δ Gθ? R=8.314 JK−1mol−1T=300K.

The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?

Meaning of 'positive ions in a sea of delocalised eletrons'.

What is instantaneous velocity?

Which of the the following will accept H+ from NH+4 ion?

If a electron is present in place of anion in a crystal lattice, then it is called

How many mol of C atoms are present in 4×10−3 mol of glucose?

The material used for coating on electric wires to avoid electric shock is __________.

Which of the following is true for osmosis?

Stability of the species Li2, Li−2 and Li+2 increases in the order of:

Total number of electrons in SO4 2- ?

In the circuit shown below, the condition to be satisfied such that the silicon transistor will never enter into saturation is (Assume VBE=0.7V,VCE(sat)=0V)

For a nucleus having mass number 125, its radius of nucleus is -

Which of the following pair of mechanisms is correct for the given reactions? CH3−CH2−CH2−BrCH3CH2OH/CH3CH2O−−−−−−−−−−−−−−−−−→△CH3−CH=CH2H3C−CH(Br)−CH3CH3CH2OH/H2O−−−−−−−−−−−→△CH3−CH=CH2

Which statement is incorrect in case of acetaldehyde and acetone?

how are there 2 different colors for the compound CoCl3.4NH3, which are green and violet?

LATTICE ENTHALY MEANING IN THERMODYNAMICS

Whathappens when H3PO3is heated?

The product [A] formed in the reaction

5.What is lewis acid base concept??

Which of the following polymers are thermoplastic? (a) Teflon (b) Natural rubber (c) Neoprene (d) Polystyrene

2 oxides of metal contain 50% and 40% metal respectively if formula of first oxide is MO then find formula of second compound

The number of isomers possible for disubstituted borazine, B3N3H4X2 is:

Between +1 or +5 which one have a higher oxidation

What will be the sum of pH and pOH in an aqueous solution?

If arg(z)<0, then arg(−z)−arg(z) equals