Q.1:- Sulphur sol contains ?
- Discrete sulphur atoms
- Discrete sulphur molecules
- Large aggregates of sulphur molecules
- Water dispersed in solid sulphur
Q.2:- Soap helps in better cleaning of clothes because ? [SSC Exam 2015]
- It reduces the surface tension of solution
- It absorbs the dirt
- It gives strength to solution
- Soap acts like catalyst
Q.3:- Which one is an example of Miscelles System here ?
- Soap + Water
- Protein + Water
- Rubber + Benzene
- All of the above
Q.4:- Copper Pyrites (CuFeS2) are concentrated by ?
- Electromagnetic Method
- Gravity Method
- Froth Floatation Method
- All of the above
Q.5:- Ni is purified by ?
- Mond Process
- Zone Refining Process
- Nan – Arkel Process
- None of the above
Q.6:- In roasting ?
- No metal impurities are removed
- Ore becomes porous
- Moisture is removed
- All of the above
Q.7:- Electrolytic reduction method is used in extracting of ?
- Noble Metals
- Highly electropositive elements
- Highly electronegative elements
- Transition metals
Q.8:- The process of sudden cooling is known as ?
- Annealing
- Diffusion
- Quenching
- Sedimentation
Q.9:- Duralumin is an alloy of ?
- Al and Mg
- Al and Ni
- Al, Mg and Ni
- Al, Mg, Ni and Cu
Q.10:- Silicon is the main constituent of ?
- Rocks
- Alloys
- Animals
- Plants
Q.11:- The chemical name of Baking Soda is ? [SSC CGL Exam 2014]
- Sodium Carbonate
- Sodium Bicarbonate
- Sodium Chloride
- Sodium Nitrate
Q.12:- Which one of the following does not form Amalgam ?
- Ag
- Cu
- Fe
- Zn
Q.13:- The mineral containing Titanium occurring in India is ?
- Bauxite
- Dolomite
- Chalcopyrite
- Illmenite
Q.14:- The most malleable of all the metals is ?
- Ag
- Au
- Na
- Pt
Q.15:- Silver containing lead as an impurity is removed by ?
- Polling
- Cupellation
- Lavigation
- Distillation
Q.16:- In the reverberatory furnace ?
- The flames do not come in contact with the charge
- The flames come in contact with the charge
- Only hot gases come in contact with the charge
- None of the above
Q.17:- Purification of Aluminium by electrolyte refining is known as ?
- Hoope’s Process
- Serpeck’s Process
- Hall’s Process
- Baeyer’s Process
Q.18:- Lithium can react with water but cannot fuse in it due to ?
- High boiling point
- High melting point
- Low boiling point
- Low melting point
Q.19:- Heavy metals got their name because compared to other atoms they have ? [SSC CGL Exam 2015]
- Higher atomic number
- Higher atomic radii
- Higher atomic masses
- Higher densities
Q.20:- Calcium decomposes water and liberates ?
- H2
- O2
- CaO
- CaO2
Q.21:- Which of the following compounds of Zinc is white when cold and yellow when hot ?
- ZnS
- ZnCl2
- ZnSO4
- ZnO
Q.22:- Which of the following is used in atomic reactors ?
- Fe
- Cd
- Ru
- Al
Q.23:- The highest oxidation state shown by any transition element is ?
- +8
- +7
- +6
- +5
Q.24:- The electronic configuration of Cu is ?
- 3d94s2
- 3d104s1
- 3d95s2
- 3d105s1
Q.25:- Mohr’s salt on oxidation with conc. HNO3 gives ?
- Ferric Alum
- Potash Alum
- Chrome Alum
- All of the above