Q. Carcinogenic chemicals are expected to cause
1) allergy
2) tuberculosis
3) cancer
4) anaemia
Q. Carbon occurs in nature in the purest form as
1) Diamond
2) Graphite
3) Carbon black
4) Coal
Q. Atomic number of an element gives
1) the number of electrons in its atom
2) the number of nucleons in its atom
3) the weight of the atom of the element
4) the total number of elementary particles in its atom
Q. An element with atomic number 36 belongs to the
1) s-block
2) p-block
3) d-block
4) f-block
Q. An element that can form a pentoxide is
1) nitrogen
2) boron
3) phosphorus
4) aluminium
Q. An element found in all organic compounds is
1) nitrogen
2) carbon
3) calcium
4) none of them
Q. Aluminium is extracted from bauxite
1) by reduction with carbon
2) by reduction with Mg
3) by reduction with co
4) by electrolysis in molten cryolite
Q. Alloys in which mercury is one of the metals are called
1) amalgams
2) emulsions
3) mixtures
4) solders
Q. Alloy steel containing chromium to resist rusting,is known as
1) wrought iron
2) cast iron
3) hard steel
4) stainless steel
Q. All pottery ware made from common clay and which are not covered with glaze is called
1) Terracotta
2) Cermets
3) Enamels
4) Fire Bricks
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