Q. When the difference in electronegativity is large, the resulting bond is
1) Metallic bond
2) Covalent bond
3) Ionic bond
4) Non-polar bond
Q. Glass is mostly produced by heating to about 1,400 degree Centigrade
1) Limestone and soda ash
2) Soda ash and silica
3) Silica and limestone
4) Limestone, silica and soda ash
Q. Carbon dioxide is
1) An acidic oxide
2) A basic oxide
3) A neutral oxide
4) An atmospheric oxide
Q. A covalent linkage is set up between two atoms when
1) Difference in their electronegativity values is very high
2) Their electronegativity values are about the same
3) They are placed in the same vertical group of periodic table
4) When both have the same number of valency electrons
Q. Water is a good solvent for many salts because it
1) Is neutral
2) Is a poor conductor of electricity
3) Can be easily converted into steam
4) Has high dielectric constant and thus can loosen the bonds between the ions
Q. Principal quantum number represents
1) The sub-shell to which the electron belongs
2) The location of the orbit of revolution of the electron in the sub-shell
3) The energy shell or level in which the electron is revolving round the nucleus
4) Rotation about its own axis as well during its motion in an orbit around the nucleus
Q. The extraction of metals from the sulphide ores is usually done by
1) Electrolysis
2) Smelting process
3) Metal displacement method
4) Froth floatation process
Q. Which of the following is the most favourable condition for the reaction of nitrogen with hydrogen of form ammonia?
1) High pressure, high temperature and high concentration of reactants
2) High pressure, low temperature and high concentration of reactants
3) High pressure, low temperature and low concentration of reactants
4) Low temperature, low pressure and high concentration of reactants
Q. Nitrolim is a mixture of
1) Nitrogen and aluminium
2) Calcium cyanamide and coke
3) Calcium and nitrogen
4) Calcium carbide and nitrogen
Q. A substance at high temperature glows because of
1) High kinetic energy of the atoms
2) Vibration of the molecules
3) Excitation of electrons within the atomic nucleus
4) All of the above
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