A nuclear magnetic resonance transition is shifted from the reference in a 400 MHz NMR spectrometer by 529 Hz. Calculate the chemical shift.
After any chemical reaction ____________.
How many nearest neighbours are there for an atom in a hexagonal close-packed crystal structure?
How many nodes are expected for the vibrational wavefunction with quantum number v = 4?
The pyrimidine bases present in DNA are:
Beta rays emitted by a radioactive material are :
The metal that is used as a catalyst in the hydrogenation of oils is:
The hottest part of the gas flame is known as:
Which gas is used to manufacture vanaspati from vegetable oil is:
The half-life of radioactive radon is 3.8 days. The time at the end of which 1/20th of radon sample will remain undecayed is (given log 10e = 0.4343):
The gas used for artificial ripening of green fruit is ?
The metallurgical process in which a metal is obtained in a fused state is called:
What nucleus of atom contains ?
Which of the following statements is true for an ideal-dilute solution?
The metal used to recover copper from a solution of copper sulphate is:
Which of the vitamins given below is water soluble ?
The oxide of Nitrogen used in medicine as anaesthetic is ?
H2O is liquid and H2S is a gas because:
The most abundant rare gas in the atmosphere is:
Consider the following statements :
(1) An alloy is a mixture of two or more metals.
(2) An alloy is a mixture of a metal or metals with a non-metal.
Which of the statements given above is/are correct ?
What are reactive metals called?
Which have maximum number of isotopes ?
Which one of the following is the correct statement?
While performing cathode ray experiments, it was observed that there was no passage of electric current under normal conditions. Which of the following can account for this observation ?
The dipole moment of hydrogen fluoride, HCl, is 1.91 D and the bond length is 0.917 Å. Calculate the fractional charge on the hydrogen and chlorine atoms.
Which among the following element is an essential constituent of acids?
The chemical used as a fixer in photography is ?