Q.1:- The enzymes are killed ?
- at a very high temperature
- during chemical reaction
- at low temperature
- under atmospheric pressure
Q.2:- A system which can exchange energy with the surroundings but no matter is called ?
- A heterogeneous system
- An open system
- A closed system
- An isolated system
Q.3:- The law of Lavoisier and Laplace illustrates ?
- The principle of conservation
- Equivalence of mechanical and thermal energy
- The principle of conservation of matter
- Equivalence of mechanical and chemical energy
Q.4:- Which Hydrocarbon is mainly present in Gobar Gas ?
- Butane
- Propane
- Methane
- Ethane
Q.5:- For which one of the following elements, the standard enthalpy is no zero ?
- C (Diamond)
- C (Graphic)
- Liquid Mercury
- Rhombic Sulphur
Q.6:- Which one of the following fuels causes minimum environmental pollution ? [IAS Exam 1995]
- Diesel
- Coal
- Hydrogen
- Kerosene
Q.7:- Born-Haber cycle is used to determine ?
- Electronegativity
- Lattice Energy
- Both
- None of the above
Q.8:- The element that has the highest first ionization potential is ?
- Boron
- Nitrogen
- Oxygen
- Carbon
Q.9:- Number of elements in the second period of the periodic table is ? [SSC Exams 2014]
- Eighteen
- Eight
- Two
- Ten
Q.10:- Diagonal relationship is shown by ?
- Elements of 1st period
- Elements of 2nd period
- Elements of 3rd period
- None of the above
Q.11:- When a gas is turned into a liquid, the process is called ? [JSS Exams 2015]
- Condensation
- Evaporation
- Deposition
- Sublimation
Q.12:- Which of the following metals is not attacked by the environment ?
- Gold
- Copper
- Silver
- Iron
Q.13:- Difference between crystalloids and colloids is of ?
- Solubility
- Reactivity
- Size of particles
- None of these
Q.14:- Galvanised Iron sheets have a coating of ?
- Zinc
- Chromium
- Tin
- Lead
Q.15:- The movement of colloidal particle is under the influence of electric field is called ?
- Electro-dialysis
- Electro-osmosis
- Electrolysis
- Electrophoresis
Q.16:- Which of the following is not a colloid ?
- Chlorophyll
- Smoke
- Ruby Glass
- Milk
Q.17:- The process of separating of cream from milk is called ?
- Emulsification
- Demulsification
- Emulsions
- Electro-osmosis
Q.18:- The oil used in the flotation method for the purification of ores is ?
- Coconut oil
- Olive oil
- Pine oil
- None of the above
Q.19:- Plaster of Paris is made from ? [SSC Exams 2014]
- Marble
- Bauxite
- Limestone
- Gypsum
Q.20:- The compound of a metal found in nature is called ?
- Mineral
- Core
- Flux
- Slag
Q.21:- Tin and Lead can be refined by ?
- Poling
- Liquation
- Bassemerisation
- Cupellation
Q.22:- A process of very slow regulated cooling is known as ?
- Annealing
- Diffusion
- Quenching
- Sedimentation
Q.23:- Which of the following are not concentrated by froth floatation method ?
- Copper Pyrite
- Pentlandite
- Pyrolusite
- Zinc Blende
Q.24:- The ore present in India in abundance is ?
- Monazite
- Magnetite
- Bauxite
- Fluorspar
Q.25:- The removal of gangue from the ore is collect ?
- Concentration
- Liquation
- Hand Picking
- Leaching