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Pb has fcc structure with edge length of unit cell 495 pm. Radius of Pb atom is

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A compound forms hcp structure. Number of octahedral and tetrahedral voids in 0.5 mole of substance is respectively

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Which of the following is not correct? a. Four spheres are involved in the formation of tetrahedral void.

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The coordination number of atoms in bcc crystal lattice is a. 2 b. 4 c. 6 d. 8

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In Frenkel defect a. electrical neutrality of the substance is changed

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Which of the following is n-type semiconductor? a. Pure Si b. Si doped with As c. Si doped with Ga

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Molecular solids are a. crystalline solids b. amorphous solids c. ionic solids d. metallic solids

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You are overtaking a car at night. You must ensure that

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A flashing yellow signal is used when

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You stop for pedestrians waiting to cross at a zebra crossing. They do not start to cross. What should you do ?

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You are allowed to park

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A high beam in foggy conditions

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When approaching a crossing where you are to go straight

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When must you use a dipped / high beam headlight during the day ?

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You are driving in rain. Why should you keep well back from the vehicle in front ?

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The following sign represents U- Turn prohibited Right turn prohibited Overtaking through left prohibited

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Validity of learners licence Till the driving licence is obtained 6 months 30 days

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The following sign represents Keep right side Parking on the right allowed Compulsory turn to right

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When a vehicle approaches an unguarded railway level crossing, before crossing it, the driver shall

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java interview questions

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