Question Discussion & Solution

The correct answer is Shift + Space.

• Short-cut key to Select entire row in M.S. Excel Worksheet is Shift + Space.

Key Points

• This table lists the most frequently used shortcuts in Excel.

Today most countries in the world have a Constitution. While all democratic countries are likely to have a Constitution, it is not necessary that all countries that have a Constitution are democratic.

Important Points

Key features of the Indian Constitution:

• Federalism:
  • This refers to the existence of more than one level of government in the country.
  • In India, we have governments at the state level, at the centre and Panchayati Raj at the village level.
  • The Constitution contains lists that detail the issues that each tier of government can make laws on.
  • In addition, the Constitution also specifies where each tier of government can get the money from, for the work that it does.
  • All persons in India are governed by laws and policies made by each of these levels of government.
• Parliamentary form of government:
  • The people of India have a direct role in electing their representatives. Also, every citizen of the country, irrespective of his/her social background, can contest in elections.
• Separation of powers:
  • There are 3 organs of government:
    • The legislature: refers to elected representatives by the people.
    • The executive: is a smaller group of people who are responsible for implementing laws and running the government.
    • The judiciary: refers to the system of courts in India.
  • Each organ mentioned above acts as a check on the other organs of government. This ensures the balance of power between all three.
• Fundamental rights:
  • The constitution guarantees the rights of individuals against the State as well as against other individuals. It also guarantees the rights of minorities against the majority.
  • The Fundamental Rights in the Indian Constitution include:
    • Right to Equality
    • Right to Freedom
    • Right against Exploitation
    • Right to Freedom of Religion
    • Cultural and Educational Rights
    • Right to Constitutional Remedies

From the above, we can conclude that the Presidential form of government is not a feature of the Indian constitution.

Concept:

• The laws dealing with ideal gases naturally called ideal gas laws, and the laws determined in the seventeenth century by Boyle's observational work and in the eighteenth century by Charles.
• The Boyles Law states that the gas pressure is inversely proportional to the gas volume for a given mass of gas stored at a constant temperature.
• Charles Law states that the gas volume is directly proportional to the gas temperature for a given fixed mass of gas stored at a constant pressure. 
• An ideal gas is a gas that follows the equation:

PV = nRT at all temperatures and pressure, where P = Pressure of the ideal gas. V = Volume of the ideal gas n = Amount of ideal gas measured in terms of moles 

R = Universal gas constant T = Temperature

Mole Concept -

•  The quantity one mole of a substance signifies 6.022 × 1023 number of particles of that substance which may be atoms, molecules, or ions.
• The quantity is a universal constant like Dozen, Gross, etc., and is known as Avogadro number, denoted by NA. after the scientist Amedeo Avogadro.
• Examples- In one mole of H2, there are 6.022 × 1023 molecules of hydrogen, and the number of atoms is 2 × 6.022 × 1023, as one molecule of hydrogen contains two-atom each.
• The mass of one mole of a substance is called its Molar Mass (M) or Atomic mass expressed in grams.
• The volume occupied by a mole of gas is 22.4 L at NTP, called its Molar Volume.
• The no. of moles (n) is calculated as =

The number of particles / Avogadro’s number.

To summarise, we can say, 

Calculation:

• The molar mass of 1 mole of H₂SO₄ is =

2 × 1 + 32 + 4 × 16 = 98g

• The molar mass of 1 mole of Silver, Ag is its molecular mass 108g.
• The molar mass of CO₂ is = 12 + 2× 16 = 44g.
• 44g of CO₂ means one mole.
• 1 mole of Oxygen weighs 16 + 16 = 32g.
• Hence, the highest mass is of 1 mole of Ag.

Option(3) is correct.

Assumption I: There is a doubt about the quality of water being supplied in the town: Cholera is spread through water or through food and to prevent the spread of cholera in town, doubt about the quality of water is precautionary. So, this assumption is implicit.

Assumption II: There is some report of cholera in town: As indicated in the given statement, the medical department attempt to prevent the spread of cholera and the spreading of disease only takes place if it exists. So, this assumption is implicit.

Hence, the correct answer is an option(3)i.e., Both the assumptions are correct.

CONCEPT:

Logic Gates:

• The logic gates are used in electronic circuits that give a certain output for a given set of Inputs.
• and which is based on a certain logic. 
• Input and output are in binary form that is 1 and 0.
• It is based on certain Logic.
• Some basic logic gates are AND gate, OR gate, NOT gate. 
• To build digital logic we develop a combination of these gates. 

AND Gate

•  If both the inputs are high, it produces a high output.
• The Boolean algebra for AND gate is X = A. B
• It means that if any of the input of A and B is zero, the output will be zero.
• If both are one, the output will be one.

The correct option is AND Gate. 

Additional Information

NOT gate:  

• It inverts the input. Whatever the input is given, it changes its value at the output.
• The Boolean algebra for NOT gate is X = X̅