Question Discussion & Solution

The correct answer is Mr Sachin Pilot.

• As of June 2020, Mr. Sachin Pilot is the Minister of Science and Technology, Panchayati Raj of Rajasthan.

Key Points

• Mr. Sachin Pilot s the Minister of Science and Technology, Panchayati Raj of Rajasthan.
• He is also the current Deputy Chief Minister of Rajasthan.
• His constituency is Ajmer, Rajasthan.
• He is associated with Indian National Congress.

Additional Information

• Mr. Ashok Gehlot is the current Chief Minister of Rajasthan in the Government of Rajasthan.
• Mr. Bulaki Das Kalla is the Minister of Energy, Public Health & Engineering, Ground Water, Art, Literature, Culture & Archeology in the Government of Rajasthan.
• Master Bhanwarlal Meghwal is the Minister of Social Justice and Empowerment in the Government of Rajasthan.

Curator means in charge of a museum similarly Warder is in charge of Prison.

In a certain code language, 'BENJAMIN' is written as 'NIMAJNEB'. First letter of the word moves last and second letter of the word moves second last place and so on.

Similarly, 'POVERTY' written in that code language as 

POVERTY is written as YTREVOP.

Hence, "YTREVOP" is the correct answer.

The correct answer is from gypsum.

Key Points

• Plaster of Paris is manufactured by heating gypsum at 423K or 150°C/300° F.
• On heating gypsum at 423 K, it loses water molecules and becomes calcium sulfate hemihydrate.
• This product is known as the plaster of Paris.

Additional Information 

• Characteristics of Gypsum Plaster:
  • Plaster of Paris is usually a white dry plaster powder.
  • It can be effectively worked with metal apparatuses or even abrasive sheets and can be shaped as per the requirements.
  • The strength of plaster of Paris is not as strong as other compounds and it often requires external support when a large amount is used.
  • It is often applied in the form of a quick-setting paste with water. 

CONCEPT:

• Semiconductor: The material which is not a good conductor or a good insulator is called a semiconductor.
  • For example: Silicon, Germanium, etc
• Intrinsic semiconductor: The pure form of semiconductor is called an intrinsic semiconductor.
• Extrinsic semiconductor: The impurity atoms added are called dopants and semiconductors doped with the impurity atoms are called extrinsic or doped semiconductors.

  • P-type semiconductor: The semiconductor having holes as majority charge carriers and electrons as a minority charge carrier is called as P-type semiconductor.

  • N-type semiconductor: The semiconductor having electrons as majority charge carriers and holes as a minority charge carrier is called as N-type semiconductor.

EXPLANATION:

• ​From the above discussion, we can say that electrons are the major charge carriers in n-type semiconductors.

• Elements of Group 5 have five valence electrons, i.e. 1 extra from the Group 4 elements.
• 4 out of 5 electrons get bonded with the neighboring Silicon atoms and 1 electron per atom remains extra with the Group 5 elements.