Chemistry (General Science): All SSC Exams Previous Years Questions Papers Solved Part 9

Q.1:- Which one amongst the following is not a Green House Gas ?

1. Nitrogen
2. Carbon Dioxide
3. Carbon Monoxide
4. Chloro Fluoro Carbons

Q.2:- Which of the following gases is mixed with Oxygen for breathing by divers in aqualungs ?

1. Methane
2. Nitrogen
3. Helium
4. Hydrogen

Q.3:- The material known in commerce as Terylene is a ?

1. Synthetic fibre
2. Natural Fibre
3. Modified natural fibre
4. Blend of cotton and silk

Q.4:- The metal extracted from Bauxite is ?

1. Silver
2. Copper
3. Manganese
4. Aluminium

Q.5:- Name two elements that find wide application in transistor industry ?

1. Silicon and Germanium
2. Carbon and Platinum
3. Iridium and Germanium
4. Tungsten and Platinum

Q.6:- If lime water is kept in the air, it turns milky due to presence of ?

1. Carbon Dioxide
2. Nitrogen
3. Oxygen
4. Sulphur Dioxide

Q.7:- The function of skimming tank in sewage treatment is to remove ?

1. Oil and fatty substances
2. Suspended solids
3. Gritty substances
4. Inorganic substances

Q.8:- Which one of the following is an example of a gel ?

1. Cheese
2. Milk
3. Face Cream
4. Shaving Cream

Q.9:- Charcoal is used in water treatment as a / an ?

1. Absorbent
2. Coagulant
3. Solvent
4. Adsorbent

Q.10:- Which of the following is caused by the higher concentration of Nitrogen and Phosphorus ?

1. Eutrophication
2. Hardness
3. Alkalinity
4. Acidity

Q.11:- Why is water not suitable for putting out a petrol fire ?

1. The oxygen content of water is isolated by petrol and thus it helps in burning
2. Petrol is too inflammable to be extinguished by water
3. The heat required for combustion of petrol is very low
4. Water, being heavy, slips below petrol which thus remains in contract with air and burns

Q.12:- Iron is extracted from ?

1. Cinnabar
2. Haematite
3. Bauxite
4. Dolomite

Q.13:- The rusting of Iron is a / an ?

1. Physical Change
2. Electrochemical Change
3. Electrical Change
4. None of the above

Q.14:- Water cycle refers to ?

1. An integrated attempt to recycle water in relatively arid regions
2. Constant movement of water from ocean to land and back to ocean once again
3. Scientific management of water in areas excessively plagued with water logging
4. Water distribution in relatively dry areas

Q.15:- What is the second largest component in milk ?

1. Fat
2. Minerals
3. Water
4. Sugar

Q.16:- Laughing gas is ?

1. Nitric Oxide
2. Nitrous Oxide
3. Nitrogen Trioxide
4. Nitrogen Pentoxide

Q.17:- Synthetic detergents are made from ?

1. Sodium Stearate
2. Sodium salt of Benzene Sulphonic Acid
3. Sodium salt of Benzene Carboxylic Acid
4. Sodium Palmitate

Q.18:- Choose the incorrect statement pertaining to organic compounds ?

1. They have low melting and boiling points
2. They do not dissolve in water
3. They are not easily combustible
4. They contain mainly Carbon and Hydrogen

Q.19:- If the sewage is fully Oxidized, the Nitrogen is in the form of ?

1. Nitrites
2. Ammonia
3. Nitramines
4. Nitrates

Q.20:- When Arsenic atoms are added to Germanium lattice, it becomes a/an ?

1. Insulator
2. Superconductor
3. Intrinsic Semiconductor
4. Extrinsic Semiconductor

Q.21:- The non-metal found in the liquid state is ?

1. Bromine
2. Nitrogen
3. Fluorine
4. Chlorine

Q.22:- Which is not an anaesthetic agent in surgical operations ?

1. Chloroform
2. Ether
3. Nitrous Oxide
4. Acetone

Q.23:- In an Oxygen molecule, two atoms are united by ?

1. One bond
2. Two bonds
3. Three bonds
4. Four bonds

Q.24:- Which among the following is a covalent compound ?

1. Calcium Chloride
2. Magnesium Fluoride
3. Sodium Chloride
4. Carbon Tetrachloride

Q.25:- Natural rubber is a polymer of ?

1. Vinyl Acetate
2. Propene
3. Isoprene
4. Styrene