Q.1:- Colloidal medicines are more effective because ?
- They are cheap
- They are easy to prepare
- The germs move towards them
- They are easily assimilated and adsorbed
Q.2:- The Brownian motion is due to ?
- Temperature fluctuation within the liquid phase
- Attraction and repulsion between charges on the colloidal particles
- Impact of the molecules of the dispersion medium on the colloidal particles
- Convection currents
Q.3:- In which of the following Tyndall effect is not observed ?
- Gold Sol
- Sugar Solution
- Emulsions
- Suspension
Q.4:- Colloidal solution commonly used in the treatment of eye disease is ?
- Colloidal silver
- Colloidal gold
- Colloidal antimony
- Colloidal sulphur
Q.5:- A naturally occurring substance from which a metal can be profitably extracted is called ?
- Mineral
- Gangue
- Ore
- Flux
Q.6:- Which of the following materials is very hard and very ductile ?
- Carborundum
- Tungsten
- Cast Iron
- Nichrome
Q.7:- The use of heat treatment of ore that includes smelting and roasting is termed ?
- Electrometallurgy
- Cryometallurgy
- Hydrometallurgy
- Pyrometallurgy
Q.8:- The magnetic separation is used for increasing concentration of the following ?
- Horn Silver
- Calcite
- Haematite
- Magnesite
Q.9:- Chalcopyrite is an ore of ?
- Calcium
- Copper
- Magnesium
- Gallium
Q.10:- The process of ore dressing is carried out to ?
- Add flux to the mineral
- Convert the ore to oxide
- Removal of the siliceous materials
- Remove the poisonous impurities
Q.11:- The purification of Alumina is done by ?
- Baeyer’s Process
- Hoop’s Process
- Bosch Process
- Castner Process
Q.12:- Which of the following is most malleable ?
- Cu
- Ag
- Au
- None of the above is malleable
Q.13:- The alum used for purifying water is ?
- Potash Alum
- Chrome Alum
- Ferric Alum
- Ammonium Alum
Q.14:- Highly pure dilute solution of sodium in liquid ammonia ?
- Exhibits electrical neutrality
- Produces sodium amide
- Produces Hydrogen gas
- Shows blue colour
Q.15:- Bauxite is concentrated by ?
- Chemical Method
- Roasting
- From Floatation Process
- Magnetic Separation
Q.16:- The least stable oxide at room temperature is ?
- CuO
- Ag2O
- ZnO
- Sb2O3
Q.17:- The percentage of gold in 21.6 carat of gold is ?
- 80%
- 90%
- 6%
- 2%
Q.18:- Which of the following is obtained, when H2S is passed through the solution of Sodium Zincate ?
- Zn(OH)2
- ZnS
- Na2[Zn(OH)4]
- Zn(NO3)2
Q.19:- The compounds of alkaline earth metals possess which of the following magnetic nature ?
- Paramagnetic
- Diamagnetic
- Ferromagnetic
- Antiferromagnetic
Q.20:- Magnesium does not decompose in ?
- Hot water
- Steam
- Semi hot water
- Cold water
Q.21:- Non ferromagnetic element is ?
- Fe
- Co
- Mn
- Ni
Q.22:- Mercury is transported in metal containers made of ?
- Lead
- Silver
- Aluminium
- Iron
Q.23:- The second series of transition elements starts with ?
- Scandium
- Ytterbium
- Rhodium
- Yttrium
Q.24:- Oils are purified by ?
- Fractional Distillation
- Steam Distillation
- Vacuum Distillation
- Simple Distillation
Q.25:- All bonds in Benzene are equal due to ?
- Isomerism
- Tautomerism
- Inductive Effect
- Resonance