Q.1:- Molasses a by-product in the manufacture of sugar is converted into ?
- Alcohol
- Paper
- Fuel
- Pulp
Q.2:- An inert gas mixed with Oxygen given to patients suffering from restricted breathing is ?
- Helium
- Krypton
- Radon
- Argon
Q.3:- Ozone depletion in the atmosphere is mainly caused by ?
- Sulphur Dioxide
- Nitrogen Dioxide
- Hydrogen Sulphide
- Chlorofluorocarbon
Q.4:- Iodine can be separated from a mixture of Iodine and Potassium Chloride by ?
- Sedimentation
- Filtration
- Sublimation
- Distillation
Q.5:- The chemical substance present in bones and teeth is ?
- Calcium Phosphate
- Calcium Chloride
- Calcium Sulphate
- Calcium Borate
Q.6:- Bakelite is a copolymer of Phenol and ?
- Formaldehyde
- Acetaldehyde
- Benzaldehyde
- Cinnaldehyde
Q.7:- A matured mammalian cell without nucleus is ?
- Lymphocyte
- Erythrocyte
- Spermatozoan
- Oocyte
Q.8:- The two metal ions that cause hardness to water are ?
- Calcium, Magnesium
- Sodium, Calcium
- Sodium, Potassium
- Sodium, Magnesium
Q.9:- An element that does not occur in nature but can be produced artificially is ?
- Thorium
- Radium
- Plutonium
- Uranium
Q.10:- The manufacture of Iron from Iron ore involves the process of ?
- Oxidation
- Reduction
- Fractional Distillation
- Electrolysis
Q.11:- The chemical used in development photographic films is ?
- Silver Bromide
- Hypo
- Sodium Sulphate
- Hydroquinone
Q.12:- The process by which milk is converted to curd is called ?
- Pasteurization
- Vernalization
- Fermentation
- Retting
Q.13:- Alcohol prepared by the distillation of wood is ?
- Propyl Alcohol
- Methyl Alcohol
- Ethyl Alcohol
- Glycerolx
Q.14:- The most common cause of pollution of air is ?
- Carbon Dioxide
- Carbon Monoxide
- Sulphur Dioxide
- Smoke
Q.15:- The name of unreactive gas is ?
- Carbon Dioxide
- Hydrogen
- Nitrogen
- Oxygen
Q.16:- The fat of a common mussel secretes a sticky glue that can be used to make heart implants. The unique chemical compound present in the glue is ?
- Amino Phenyl Alanine
- Hydroxy Phenyl Alanine
- Phenyl Alanine
- Dihydroxy Phenyl Alanine
Q.17:- The important metal used with Iron to produce stainless steel is ?
- Aluminium
- Chromium
- Tin
- Carbon
Q.18:- Exposure to mixtures of chemicals are greater than expected on the basis of effects of exposure to each chemical individually. This is known as ?
- Additives
- Antagonism
- Synergism
- Independent
Q.19:- Atoms of different elements have ?
- Same atomic number and same electronic configuration
- Different atomic number and same electronic configuration
- Different atomic number and different number of valence electrons
- Same number of electrons and neutrons
Q.20:- Who developed the model of atomic structure ?
- Bohr and Rutherford
- Volta
- Alfred Nobel
- Faraday
Q.21:- The element absorbed both in Cation and Anion form is ?
- Sulphur
- Nitrogen
- Calcium
- Phosphorus
Q.22:- The wire of flash bulbs is made up of ?
- Mg
- Ba
- Cu
- Ag
Q.23:- The alkaloid naturally found in coffee, cocoa and cola nut is ?
- Cocaine
- Morphine
- Tannin
- Caffeine
Q.24:- Sodium Carbonate is commonly known as ?
- Baking Soda
- Washing Soda
- Caustic Soda
- Caustic Potash
Q.25:- Which one of the following mineral does not contain Oxygen ?
- Haematite
- Bauxite
- Cryolite
- Calcite
