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Right CHOICE is (a) Refrigerators

To ELABORATE: The graphite is USED mostly in refrigerators. It is ALSO used in batteries, steel MAKING, expanded graphite, brake linings, foundry facings and lubricants.

The correct option is (b) Carbondioxide

To explain I WOULD say: In oxygen containing ATMOSPHERES, the GRAPHITE READILY converted into carbondioxide at TEMPERATURES of 700^oC and above.

The correct choice is (a) True

Explanation: Graphite is a GOOD CONDUCTOR of ELECTRICITY. It CONDUCTS electricity due its large de localisation of electrons. So, Graphite is used in the arc lamp electrodes.

Right answer is (c) Medical diagnosis

The best EXPLANATION: Medical diagnosis is the field in which the NANO particles are USED with silica COATED iron oxide iron oxide. They are embedded with magnetic colloidal particles sent into the blood STREAM.

Correct choice is (d) High vaccum CHAMBER

Explanation: A suspended nano wire is a wire that is PRODUCED in the high vaccum chamber HELD at LONGITUDINAL extremities.

Right answer is (a) Diamagnetic

Easy explanation: Ideal super CONDUCTORS become diamagnetic at super CONDUCTING state. The permeability is LESS than that of permeability in VACCUM.

Correct option is (B) Nano tubes

Best explanation: A water cooled surface is used in the process to COLLECT the nano tubes. While an inert gas is BLEND into chamber, the nano tubes settles on cooler SURFACES.

The correct choice is (a) Military radars

To explain I would say: The CNT POSSES MICRO wave absorption CHARACTERISTICS which are useful for the military radars and to BETTER the slith characteristics of AIR crafts.

Correct answer is (c) D2 – symmetric

To explain I would say: Some fullerenes are INHERENTLY CHIRAL because they are D4 – symmetric and have been successfully RESOLVED. Fullerenes are SPARINGLY soluble in many SOLVENTS. Common solvents for fullerenes are toulene.

Correct choice is (a) Same

For explanation: The ELECTRONS head in same direction and CONTINUE to carry CURRENT endlessly. As they are in same direction, they do not COLLIDE with each other.

Right option is (c) 1911

Explanation: Super CONDUCTORS are discovered in the year 1911 by Kammerlingh Onnes. He is a Dutch PHYSICIST. When he was MEASURING the RESISTIVITY of the mercury below 4.2K he found the super conductors.

The correct ANSWER is (b) 2GMS

To elaborate: Plasma torch method is to produce 2gms of CNT per minute. A metal crystal is used. In a thermal plasma torch method is a HIGH frequency OSCILLATING CURRENT in a coil.

Correct answer is (c) Pitting corrosion

To elaborate: The GRAPHITE UNDERGOES pitting corrosion in stainless STEEL. The creation of the small HOLES on the surface of the metal is called pitting corrosion.

Right choice is (a) Stable

Best explanation: The stability of the BORON bucky ball is more than that of the buck minister FULLERENE. The boron bucky ball is denoted by B80. It forms five or SIX BONDS.

The CORRECT choice is (c) Iron

For explanation I would SAY: The synthesized magnetic nano particles from iron and palladium have been found to self arrange AUTOMATICALLY. These materials are extensively used in the manufacture of magnetic DEVICES.

Right ANSWER is (C) FABRICATION

The best explanation: The fabrication of the ceramics is easier through the nano structuring. Fabrication is the process of PRODUCING the things.

The correct OPTION is (b) 1991

The EXPLANATION is: CARBON NANO tubes are observed in an year 1991 in the soot of the graphite during the arc DISCHARGE. First production of CNT was in 1992 by arc discharge method.

The correct choice is (b) True

The EXPLANATION is: CNT is very good thermal CONDUCTOR and exhibit a property called as BALLISTIC CONDITION. Single walled CNT at room temperature has thermal conductivity of 3500WM^-1K^-1.

Correct choice is (c) Semi conductor

To explain I would say: CNT is SEMICONDUCTOR. Because of symmetry and unique ELECTRONIC structure of GRAPHENE, it is semi conducting MATERIAL with small band gap between valence band and conducting band.

Right option is (d) 0.4nm

The EXPLANATION is: CARBON nano tubes are the sheets of graphite about 0.4nm in diameter. They are rolled up to make nm in diameter. They are very SMALL in SIZE.

The correct answer is (d) 6-6

To elaborate: The electrophilic addition is DONE at 6-6 bonds. They REDUCE the angle STRAIN. This RESULTS in changing the sp^2 HYBRIDIZATION to sp^3 hybridization making it unstable.

Correct choice is (a) HEXAGONAL RINGS

The explanation: The fullerenes are composed with the stalked graphite sheets that are linked with the hexagonal RING. They MAY also be linked with the pentagonal and HEPTAGONAL rings sometimes.