Recent questions and answers in Chemistry

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Chemistry

Some basic concepts of chemistry

Structure of Atom

Classification of Elements and periodicity in properties

Chemical Bonding and Molecular Structure

States of Matter: Gases and Liquids

Chemical Thermodynamics

Some p-block Elements

Organic Chemistry: Some Basic Principles and Techniques

Hydrocarbons

Environmental Chemistry

Questions from: Chemistry

Which of the following ion is the largest in size ?

answered Jul 11 by meena.clay6

1 answer

Which of these dose not reflect the periodicity of the elements

answered Jul 10 by meena.clay6

1 answer

Which statement is incorrect?

answered Jul 9 by meena.clay6

1 answer

Which out of $Cu^{2+},Fe^{2+}$ and $Cr^{3+}$ has highest paramagnetism and why

answered Jul 9 by meena.clay6

1 answer

How many radial/spherical nodes will be present in the 5f orbitals?

answered Jul 9 by meena.clay6

1 answer

What will be the maximum number of electrons having the same spin in an atom with n+l=4 ?

answered Jul 9 by meena.clay6

1 answer

When is the energy of electron regarded as zero.

answered Jul 9 by meena.clay6

1 answer

How many unpaired electrons are present in $Pd (Z = 46)$?

answered Jul 8 by meena.clay6

1 answer

Which element does not have any neutron?

answered Jul 8 by meena.clay6

1 answer

The increasing order (lowest first) for the values of e/m (charge/mass) for

answered Jul 5 by meena.clay6

1 answer

Atomic number of an element is equal to the number of

answered Jul 3 by meena.clay6

1 answer

Which out of $Cu^{2+},Fe^{2+}$ and $Cr^{3+}$ has highest paramagnetism and why

answered Jul 3 by meena.clay6

1 answer

How many radial/spherical nodes will be present in the 5f orbitals?

answered Jul 3 by meena.clay6

1 answer

What will be the maximum number of electrons having the same spin in an atom with n+l=4 ?

answered Jul 3 by meena.clay6

1 answer

When is the energy of electron regarded as zero.

answered Jul 3 by meena.clay6

1 answer

How many unpaired electrons are present in Pd (Z = 46) ?

answered Jul 3 by meena.clay6

1 answer

Which element does not have any neutron?

answered Jul 3 by meena.clay6

1 answer

Yellow light emitted from a sodium lamp has a wavelength $(\lambda)$ of 580 nm. Calculate thefrequency $(ν)$ and wave number of the yellow light.

asked Jul 3 by meena.clay6

0 answers

Compare the wavelengths for the first three lines in the Balmer series with those which arise from similar

answered Jun 28 by meena.clay6

1 answer

A 1 MeV proton is sent against a gold leaf (Z = 79). Calculate the distance of closest approach for head on collision.

answered Jun 28 by meena.clay6

1 answer

Atomic number of an element is equal to the number of

answered Jun 27 by meena.clay6

1 answer

The angular momentum of electrons in d orbital is equal to

answered Jun 27 by meena.clay6

1 answer

Calculate the total number of angular nodes and radial nodes present in 30 orbitals

answered Jun 27 by meena.clay6

1 answer

An element with mass number 81 contains $31.7 \%$ more neutrons as compared to protons. Assign the atomic symbol.

answered Jun 27 by meena.clay6

1 answer

What is the relationship between frequency and wavelength of light?

answered May 20 by meena.clay6

1 answer

Neutrons can be found in all atomic nuclei except in one case. Which is this atomic nucleus and what does it consists of?

answered May 20 by meena.clay6

1 answer

Which are isosters ?

answered May 16 by meena.clay6

1 answer

Calculate the wave number of lines having the frequency of $5 \times 10^{16}$ cycles per sec

answered May 16 by meena.clay6

1 answer

Calculate the ratio of K.E and P.E of an electron in an orbit?

answered May 16 by meena.clay6

1 answer

Calculate the accelerating potential that must be applied to a proton beam to give it an effective wavelength of 0.005 nm.

answered May 16 by meena.clay6

1 answer

calculate the Broglie wavelength of an electron moving with 1% of the speed of light ?

answered May 16 by meena.clay6

1 answer

What is common between $d_{xy}$ and $d_{x2-y2}$ orbitals ?

answered May 16 by meena.clay6

1 answer

Calculate energy of 2 moles of photons of radiation whose frequency is $5 \times 10^{34}\;Hz$

answered May 16 by meena.clay6

1 answer

What is relative mass and charge of an electron?

asked May 15 by meena.clay6

0 answers

Define the term scintillations?

answered May 15 by meena.clay6

1 answer

Why some atoms shows radioactivity?

answered May 15 by meena.clay6

1 answer

Which one of the following is not true ?

answered May 15 by meena.clay6

1 answer

Equal moles of hydrogen and oxygen gases are placed in a container with a pin- hole through which both can escape. what fraction of the oxygen escapes in the time required for one half of the hydrogen to escape ?

answered May 15 by meena.clay6

1 answer

What is limiting reagent?

answered May 15 by meena.clay6

1 answer

Calculate the amount of water in gm produced by the combustion of 8 gms of Ethane

answered May 15 by meena.clay6

1 answer

What is heterogeneous mixture? Give an example.

answered May 15 by meena.clay6

1 answer

If $500\;mL$ of a 5 M solution is diluted to 1500 mL, what will be the molarity of the solution obtained ?

answered May 14 by meena.clay6

1 answer