Question Discussion & Solution

A scalar is a quantity which has only a magnitude but not a direction whereas vector is a quantity which has both a magnitude and a direction.

Volume is a scalar quantity similarly, momentum is a vector quantity while time, speed and energy are the scalar quantities.

The correct answer is option 2 i.e C₄H_10.

Concept:

Hydrocarbons

• Compounds made of carbon and hydrogen atoms only are called hydrocarbons.
• Saturated hydrocarbons:
  • The hydrocarbons in which carbon atoms are singly bonded are called saturated hydrocarbons.
  • Saturated hydrocarbons are also called alkanes or paraffin.
    • The general formula of alkane– CnH2n+2.
• Unsaturated hydrocarbons:
  • The hydrocarbons in which carbon atoms are either doubly or triply bonded are called unsaturated hydrocarbons.
  • Doubly bonded (carbon atoms) hydrocarbons are called alkenes.
  • The general formula of alkene is CnH2n.

• The formula for alkane should be mentioned C_nH_2n+2

Explanation:

The correct answer is Governor.

• Appointment of District Judge (Article - 233):
  • District Judges' appointments, posting, and promotions are being done by Governor in consultation with the respective high court.

Key Points

• Eligibility-
  • He/She is not serving the government of India or the state government.
  • He/She will have at least 7 years experience of working as a lawyer.
  • High Court has recommended his/her for appointment as Judge.

The correct answer is No weight.

Explanation:

• Gravity is a force that attracts a body toward the centre of the earth or any other mass-bearing physical body.

F = mg
where F is force, 
m is mass, and 
g is acceleration due to gravity.

• The weight of an object is the force that attracts it to the earth.
• A body that is free to fall under the influence of gravity is acted upon by the force of gravity.
• However, the object is not exerting any force on any surface. As a result, the weight of object is no weight (zero).

Words are necessary part of SONG. Chorus, Music and Singer are important but without words song can’t be created.