Which among the following is popularly called Hypo?
The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is :
What is a mixture of potassium nitrate powdered charcoal and sulphur called?
The main use of salt in the diet is to:
Conduction band electrons have more mobility than holes because they are:
Among the following acids which has the lowest pKa value?
What is the magnitude of the restoring force exerted when an elastomer chain is extended by 25% at 25°C? Assume that the length of each bond within the elastomer backbone is 154 pm.
The substance that contains the maximum amount of nitrogen is ?
The compound that has the least value for octane number is :
Which one is an organic Acid ?
An ionic compound has a unit cell consisting of A ions at the corners of a cube and B ions on the centres of the faces of the cube. The empirical formula for this compound would be:
The correct order of these fuels in terms of their
calorific value in increasing order is
(1) Hydrogen gas (2) Kerosine oil
(3) Charcoal (4) Wood
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Elements that show the properties of both metals and non metals are called ?
The nucleus of an atom consists of:
Two solutions of a substance (non electrolyte) are mixed in the following manner. 480 ml of 1.5 M first solution + 520 mL of 1.2 M second solution. What is the molarity of the final mixture?
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:
Which among the following methods can be used to remove the permanent hardness in water due to calcium or magnesium sulphates?
The difference between a nuclear reactor and atomic bomb is that:
The root-mean-square distance between the ends of a polymer chain was found to be 6.2 nm. Estimate the number of monomers in the chain, given that the length of each monomer unit is 2.1 Å.
What is Calcium sulphate ?
During a nuclea fusion reaction:
The credit of construction of first nuclear reactor goes to -
Which among the following is an example of a Chemical Change?
Organic chemistry is the study of the compounds that make up living organisms. All organic molecules contain:
The Pauling electronegativities of fluorine and chlorine are 4.0 and 3.0 respectively. Estimate the dipole moment of chlorine monofluoride, ClF.
Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture?
The heat required to raise the temperature of body by 1 K is called:
Horizontal rows in the periodic table are called ___________.
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