The pyrimidine bases present in DNA are:
Consider the following parts of spectra:
(1) Visible (2) Infrared (3) Ultraviolet (4) Microwave
Which of the following is the correct sequence in which the wavelengths increase?
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In which of the following molecules/ions are all the bonds not equal?
You can't live without water! What is its chemical formula?
A pressure vessel contains a gaseous mixture made up of 2.34 kg silane, SiH4, and 55.4 kg argon. Determine the mole fraction of silane.
The Pauling electronegativities of fluorine and chlorine are 4.0 and 3.0 respectively. Estimate the dipole moment of chlorine monofluoride, ClF.
What is a mixture of potassium nitrate powdered charcoal and sulphur called?
Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is:
For a galvanic cell, which of the following statements is never true?
The metallurgical process in which a metal is obtained in a fused state is called ?
The vapour pressure of toluene is 6.811 kPa at 310 K and 24.15 kPa at 340 K. Assuming that the variation of the vapour pressure p with temperature T may be described by the expression What are the values of A and B?
Reactive metals are extracted by ______________.
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 monomer of polythene is:
What does the airbag, used for safety of car driver, contain?
Which one of the following sets of elements was primarily responsible for the origin of life on the Earth?
Which of the following is the best criteria of purity of organic compounds?
Assertion : Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen.
Reason : The reaction between nitrogen and oxygen requires high temperature.
During a nuclea fusion reaction:
The most extensive, commercially useful source of thorium as monazite sand occurs in India at:
The inert gases are ____________ in water.
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.
Which gas is used to manufacture vanaspati from vegetable oil is:
Noble gases are inert because they have completed outer electron shells. Which of these elements isn't a noble gas?
The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is :
Which gas is used in fire extinguishers ?
H2O is liquid and H2S is a gas because:
Which of the five isomeric hexanes, the isomer which can give two monochlorinated compounds?