Q.1:- An alloy used in making heating elements for electric heating device is ?
- Solder
- Alloy Steel
- Nichrome
- German Silver
Q.2:- The pair of compounds used as anaesthetic in medicines ?
- Ether, Ammonia
- Nitrous Oxide, Chloroform
- Chloroform, Nitrogen Dioxide
- Nitrogen Dioxide, Ether
Q.3:- Rectified spirit is ?
- 95% Ethyl Alcohol
- 100% Ethyl Alcohol
- Methylated Spirit
- Tincture Iodine
Q.4:- The molecular used in a nuclear reactor is ?
- Uranium
- Radium
- Ordinary Water
- Graphite
Q.5:- Hydrochloric acid is also known as ?
- Galic Acid
- Picric Acid
- Muriatic Acid
- Chloric Acid
Q.6:- Nucleons are regarded as composites sub-particles known as ?
- Mesons
- Quarks
- Leptons
- Photons
Q.7:- Which one of the following elements exhibits the greatest tendency to lose electrons ?
- Fluorine
- Lithium
- Oxygen
- Zinc
Q.8:- Chemical range of common salt is ?
- Sodium Chloride
- Sodium Bicarbonate
- Sodium
- Sodium Oxide
Q.9:- The inert gas which is substituted for Nitrogen in the air used by deep sea divers for breathing, is ?
- Xenon
- Krypton
- Argon
- Helium
Q.10:- An acid having basicity one is ?
- Sodium Di-Hydrogen Phosphate
- Di-Sodium Hydrogen Phosphate
- Sodium Phosphate
- Phosphoric Acid
Q.11:- Organic food is supposed to be better for human consumption because ?
- It is grown in glass house & air tight environment
- It is grown without the use of chemicals & synthetic pesticides
- It depends on chemicals & fertilizers
- It is too expensive to buy
Q.12:- Acid rain is caused by the pollution of environment by ?
- Carbon Dioxide and Carbon Dioxide
- Ozone and Carbon Dioxide
- Nitrous Oxide and Sulphur Dioxide
- Carbon Dioxide and Nitrogen
Q.13:- Heavy water is ?
- Deuterium
- Rain Water
- Tritium Oxide
- Deuterium Oxide
Q.14:- Atoms having the same number of protons but different number of neutrons are called ?
- Isotopes
- Cations
- Higgs-Boson
- Anions
Q.15:- Acid rain is caused due to pollution of atmosphere by ?
- Oxides of Carbon and Nitrogen
- Oxides of Nitrogen and Sulphur
- Oxides of Nitrogen and Phosphorous
- None of these
Q.16:- Atomic explosion is triggered by ?
- Thermo Nuclear Reaction
- Chemical Reaction
- Controlled Chain Reaction
- Uncontrolled Chain Reaction
Q.17:- Which of the following is not a gaseous air pollutant ?
- Oxides of Nitrogen
- Hydrocarbon
- Smoke
- Oxides of Sulphur
Q.18:- All isotopes of the same element have ?
- Different atomic numbers and different atomic mass
- Different atomic numbers and the same atomic mass
- The same atomic number but different atomic masses
- The same atomic number and the atomic mass
Q.19:- An emulsion is a colloidal solution of ?
- Liquid in liquid
- Solid in liquid
- Gas in solid
- Solid in Solid
Q.20:- Thermal electricity is generated by using which of these ?
- Coal only
- Coal and Natural Gas only
- Coal, Natural Gas and Petroleum
- None of these
Q.21:- Nylon threads are made of ?
- Polyester Polymer
- Polyamide Polymer
- Polyvinly Polymer
- Polysaccharide
Q.22:- Which one of the following non-metals shows allotropy in the liquid state ?
- Carbon
- Sulphur
- Phosphorous
- Bromine
Q.23:- Highest percentage of carbon is found in which form of coal ?
- Anthracite
- Bituminous
- Peat
- Lignite
Q.24:- White Phosphorus is generally kept under ?
- Alcohol
- Water
- Glycerine
- Water
Q.25:- When a bond is formed between two atoms, the energy of the system will ?
- Increase
- Decrease
- Remain the same
- May increase or decrease
