The most electropositive elements among the following is
The metal that is used as a catalyst in the hydrogenation of oils is
The maximum number of isomers for an alkene with molecular formula C4H8 is
The molecule which has the highest percentage of ionic character among the following is
The inexpensive and commonly used variety of glass is called soda glass. It is called so because
The oil used in the froth floatation process is
The hardest form of carbon is
The most abundant rare gas in the atmosphere is
The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of
The maximum number of covalent formed by nitrogen is
The most important ore of aluminium is
The Latin word formica means ant. The name formic acid is derived from this Latin word because
The formula C6H5-CO-CH3 represents
The high reactivity of fluorine is due to
The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of
The molecules of which gas have highest speed?
The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?
The ore which is found in abundance in India is
The metal that is usually extracted from sea water is
The iron ore magnetite consists of
The number of electrons presents in H+ is
The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called
The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
The inherited traits of an organism are controlled by
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is
The hottest part of the gas flame is known as
The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is
The number of atoms present in 21.6 gram of silver (atomic weight =are same as the molecules in
The heat energy produced when the human body metabolises 1 gram of fat is
What are the number of moles of CO2 which containsg of oxygen?
The major constituent of air is
The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
The main buffer system of the human blood is
The National Chemical Laboratory is situated in
The molecular formula of phosphorous is
The main chemical constituent of clay is
The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is
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
Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be
The mineral containing both magnesium and calcium is
The most commonly used bleaching agent is
The mass number of an atom is equal to
The nucleus of an atom consists of
The number of moles of solute present in 1 kg of a solvent is called its
The most electronegative element among the following is
The metal used to recover copper from a solution of copper sulphate is
The number of d-electrons in Fe2+ (Z =is not equal to that of
The metallurgical process in which a metal is obtained in a fused state is called
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