Atomic number of an element gives:
It is suggested by the doctors that the person suffering from prostrates in the kidney or gallbladder should not consume excessively the food stuffs like tomatoes, eggs, milk etc which are the major causes of the crystal formation as the prostrates, which is made of :
Human bone does not contain ?
Which gas is used to manufacture vanaspati from vegetable oil is:
Lodine can be separated from a mixture of Iodine and Potassium Chloride by ?
What is the most common isotope of hydrogen?
Which of the following is the best criteria of purity of organic compounds?
The half-life period of a rdaioactive element X is same as the mean life time of another radioactive element Y. Initially both of them have the same number of atoms. Then
Which of the following elements behave chemically both as a metal and a non metal?
The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is:
A nuclear magnetic resonance transition is shifted from the reference in a 400 MHz NMR spectrometer by 529 Hz. Calculate the chemical shift.
If α is the degree of dissociation of Na2SO4, the vant Hoff’s factor (i) used for calculating the molecular mass is:
Which of the following factors may be regarded as the main cause of lanthanide contraction?
The nucleus of a hydrogen atom consists of:
What is the role of ultraviolet (UV) radiation in the water purification system?
(1) It inactivates / kills the harmful micro- organisms in water.
(2) It removes all the undesirable odours from the water.
(3) It quickens the sedimentation of solid particles and improves the clarity of water.
Which of the statements given above is/are correct?
If you fill a glass to the brim with ice water and the ice melts, what will happen?
α-D-(+)-glucose and β-D-(+)-glucose are
Which one of the following types of drugs reduces fever?
The nuclear particles which are assumed to hold the nucleons together are:
Which of the following substances is/are ozone depleting? Select the correct answer from the codes given below:
(1) Chlorofluorocarbons
(2) Halons
(3) Carbon tetrachloride
Identify the wrong statement in the following?
What does Nucleus consist of?
The ionic mobility of alkali metal ions in aqueous solution is maximum for:
The most extensive, commercially useful source of thorium as monazite sand occurs in India at:
Which of the following is used to freeze food?
The metal used to recover copper from a solution of copper sulphate is: