Acid rain is due to air pollution by ?
The ionic mobility of alkali metal ions in aqueous solution is maximum for:
The lanthanide contraction is responsible for the fact that:
Bleaching action of chlorine is by ?
The number of electrons presents in H+ is:
Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?
Which of the following is used to freeze food?
How many normal modes of vibrational are possible for a benzene molecule?
From the following statements regarding H2O2, choose the incorrect statement :
The symbol Sb stands for stibnum or stibnite. What is the modern name of this element?
Who proposed first atomic theory ?
The heat energy produced when the human body metabolises 1 gram of fat is:
The most abundant rare gas in the atmosphere is ?
What is the most common isotope of hydrogen?
Ions are charged particles that form when atoms ____________.
Alloys made with mercury as one metal are called ?
Which of the following is correct?
The inexpensive and commonly used variety of glass is called soda glass. It is called so because:
Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains:
2 methylbutane on reacting with bromine in the presence of sunlight gives mainly:
Mass number of a nucleus is :
Which have the maximum density ?
Which one of the following pairs of species have the same bond order?
Which one of the following types of drugs reduces fever?
What is a mixture of potassium nitrate powdered charcoal and sulphur called?
Which of the following gas is used in cigarette lighters ?
The main use of salt in the diet is to:
The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is :