Q.1:- Submarines move under water. They have engines that run on ?
- Petrol and Oxygen
- Diesel
- Batteries
- Steam
Q.2:- Chemically ‘Quick Silver’ is known as ?
- Mercury
- Silver
- Gold
- Copper
Q.3:- The gas which is mainly responsible for the Green House Effect is ?
- Ozone
- Oxygen
- Carbon Dioxide
- Carbon Monoxide
Q.4:- The drug ‘Marijuana’ is a ?
- Sedative
- Mental Stimulant
- Hallucinating Substance
- Tranquilizer
Q.5:- Which metal does not undergo corrosion due to the formation of oxide layer ?
- Copper
- Iron
- Aluminium
- Zinc
Q.6:- Chemical name of bleaching powder is ?
- Calcium Chlorate
- Calcium Hypochlorite
- Calcium Chloro Hypochlorite
- Calcium Bi Chloride
Q.7:- Copper is refined by ?
- Roasting
- Oxidation
- Electrolysis
- Zone Refining
Q.8:- Spirit in contact with body gives cool sensation because it is ?
- Liquid
- Transparent
- Highly Volatile
- A good conductor
Q.9:- Which one of the following elements is used in the manufacture of fertilizers ?
- Fluorine
- Potassium
- Lead
- Aluminium
Q.10:- A powerful eye irritant present in smog is ?
- Nitric Oxide
- Sulphur Dioxide
- Peroxyacetyl Nitrate
- Carbon Dioxide
Q.11:- Ozone layer is present in ?
- Troposphere
- Ionosphere
- Stratosphere
- Exosphere
Q.12:- The gas that usually causes explosions in coal mines is ?
- Hydrogen
- Carbon Monoxide
- Air
- Methane
Q.13:- When Hydrogen starts burning in air, it produces ?
- Ammonia
- Water
- Methane
- Carbonic Acid
Q.14:- What is “milk of magnesia” chemically ?
- Magnesium Carbonate
- Sodium Bicarbonate
- Calcium Hydroxide
- Magnesium Hydroxide
Q.15:- Who developed atom bomb ?
- Warner Wan Brown
- Robert Openheimer
- Edward Taylor
- Samuel Koehen
Q.16:- What is the chemical name for ‘Baking Soda’ ?
- Sodium Carbonate
- Sodium Bicarbonate
- Sodium Nitrite
- Sodium Nitrate
Q.17:- Which of the following Alkali Metals has highest specific heat ?
- Caesium
- Rubidium
- Potassium
- Lithium
Q.18:- Which one of the following metals is used to galvanise Iron ?
- Copper
- Lead
- Zinc
- Mercury
Q.19:- Humburger effect is otherwise known as ?
- Sodium Pump
- Anaerobic Metabolism
- Choloride Shift
- Respiratory Product
Q.20:- Bauxite is an alloy of which of the following metals ?
- Aluminium
- Silver
- Tin
- Iron
Q.21:- Which of the following elements is non-radioactive ?
- Uranium
- Thorium
- Plutonium
- Zirconium
Q.22:- Cooking gas is a mixture of ?
- Methane and Ethylene
- Carbon Dioxide and Oxygen
- Butane and Propane
- Carbon Monoxide and Carbon Dioxide
Q.23:- Cement is formed by strongly heating a mixture of ?
- Limestone and Graphite
- Limestone and Clay
- Chalk and Graphite
- Clay and Graphite
Q.24:- Hydrogen bomb is based on the principle of ?
- Controlled fission reaction
- Uncontrolled fission reaction
- Controlled fusion reaction
- Uncontrolled fusion reaction
Q.25:- Rock salt is mineral containing ?
- Potassium
- Magnesium
- Sodium
- Iron
