Q.1
Cement is usually a mixture of :
Q.2
Limestone is a raw material used by which industry?
Q.3
The element absorbed both in cation and anion form is
Q.4
Find the odd one:
Q.5
The chemical name of 'Hypo' commonly used in photography is
Q.6
Oxygen has (+) oxidation number only in
Q.7
The mass number of a nucleus is
Q.8
The oil used in the froth floatation process is
Q.9
Calcium salts used as fertilizer is :
Q.10
Aluminium salt commonly used to stop bleeding is
Q.11
Sodium bicarbonate is commercially known as
Q.12
Which of the following is the main nitrogenous waste in humans ?
Q.13
Cement containing excess amount of lime
Q.14
The chemical name of 'Plaster of Paris' commonly used for setting broken bones is
Q.15
Interveinal necrotic spots on leaves appear due to
Q.16
The most electropositive elements among the following is
Q.17
The method that cannot be used for removing permanent hardness of water is
Q.18
The oxidation number of nickel in K4[Ni(CN)4] is
Q.19
The inexpensive and commonly used variety of glass is called soda glass. It is called so because
Q.20
The number of waves in n x 10th Bohr's orbit are
Q.21
The mass of one Avogadro number of helium atom is
Q.22
In silvery paints, the main constituent present is
Q.23
Which among the following elements is found in maximum percentage in the human body ?
Q.24
Quartz is a crystalline form of
Q.25
Commercially, sodium bicarbonate is known as
Q.26
The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?
Q.27
How many neutrons are there in 92U238 atom ?
Q.28
The number of neutrons present in an element having mass number 226 and atomic number 88 is :
Q.29
The gas used in the manufacture of vanaspati from vegetable oil is
Q.30
The items amenable to detection by soft x-rays are
Q.31
Urea is a
Q.32
Who modified Bohr's theory by introducing elliptical orbits for electron path?
Q.33
The ionic radii of N3-, O2-, F- and Na+ follows the order
Q.34
The material which can be deformed permanently by heat and pressure is called a
Q.35
The graphite rods in the nuclear reactor
Q.36
Chemical name of vinegar is
Q.37
The main use of salt in the diet is to
Q.38
The most common cause of pollution of air is
Q.39
Acid rain is caused by
Q.40
The sewage obtained from water closets and urinals is known as
Q.41
The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
Q.42
The hardest form of carbon is
Q.43
The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is
Q.44
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?
Q.45
The most commonly used bleaching agent is
Q.46
The iron ore magnetite consists of
Q.47
The most important ore of aluminium is
Q.48
The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of
Q.49
The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
Q.50
The major constituent of air is
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