Chemistry-
General
Easy
Question
Which one of the following species is isoelectronic with P3–?
- Kr
- Ca2+
- Na+
- F–
The correct answer is: Ca2+
Related Questions to study
Chemistry-
The energy of an electron in the first Bohr orbit for He+ ion is –54.4 eV. Which one of the following is a possible excited state for electron in Bohr orbit of He+ ion?
The energy of an electron in the first Bohr orbit for He+ ion is –54.4 eV. Which one of the following is a possible excited state for electron in Bohr orbit of He+ ion?
Chemistry-General
Chemistry-
Which of the following electronic transitions from one orbit to another corresponds to the third line in the Balmer series of hydrogen spectrum?
Which of the following electronic transitions from one orbit to another corresponds to the third line in the Balmer series of hydrogen spectrum?
Chemistry-General
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Among the following the one which represents incorrect set of quantum numbers is
Among the following the one which represents incorrect set of quantum numbers is
Chemistry-General
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The chemist who helped in the discovery of the maximum number of transuranic element is:
The chemist who helped in the discovery of the maximum number of transuranic element is:
Chemistry-General
Chemistry-
Statement 1:Rate of ethanolysis of 
halide 
by 
mechanism is fast
Statement 2:Carbocation is stabilized by resonance
Statement 1:Rate of ethanolysis of halide by mechanism is fast
Statement 2:Carbocation is stabilized by resonance
Chemistry-General
Chemistry-
Statement 1: 
Statement 2:The product (B) results by 
mechanism and product (C) results by 
mechanism
Statement 1:
Statement 2:The product (B) results by mechanism and product (C) results by mechanism
Chemistry-General
Chemistry-
In the esterification of an organic acid 
by alcohol 
of acid is isotopic
Which of the following statement is correct?
In the esterification of an organic acid by alcohol of acid is isotopic
Which of the following statement is correct?
Chemistry-General
Chemistry-
The work function (
) of some metals is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metals is :
The work function () of some metals is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metals is :
Chemistry-General
Chemistry-
Radioactive disintegration differs from a chemical change in being
Radioactive disintegration differs from a chemical change in being
Chemistry-General
Chemistry-
Rutherford’s scattering experiment is related to the size of the
Rutherford’s scattering experiment is related to the size of the
Chemistry-General
Chemistry-
The correct set of quantum numbers for the unpaired electron of chloride atom is
The correct set of quantum numbers for the unpaired electron of chloride atom is
Chemistry-General
Chemistry-
The correct set of quantum numbers for the unpaired electron of chlorine atom is:
The correct set of quantum numbers for the unpaired electron of chlorine atom is:
Chemistry-General
Chemistry-
Bombardment of aluminium by 
particle leads to its artificial disintegration in two ways, (i) and (ii) as shown. Products 
and 
respectively are
Bombardment of aluminium by particle leads to its artificial disintegration in two ways, (i) and (ii) as shown. Products and respectively are
Chemistry-General
Chemistry-
The radiant energy from the sun is due to
The radiant energy from the sun is due to
Chemistry-General
Chemistry-
The negative value of packing fraction indicates that the isotope is
The negative value of packing fraction indicates that the isotope is
Chemistry-General
