Question Discussion & Solution

Hence, option 4 completes the pattern in question figure.

The correct answer is OMR.

Important Points

• Optical mark recognition
  • It is the input device used to scan a marked answer book of a multiple choice question paper.
  • An optical answer sheet or bubble sheet is a special type of form used in multiple-choice question examinations. 
  • Optical mark recognition is used to detect answers.

Additional Information

• OCR
  • ​OCR (Optical Character Recognition) recognizes all the characters from the paper document.
  • It collects and stores them into an editable document.
• ​MICR
  • ​The term magnetic ink character recognition (MICR) refers to the line of numbers that appears at the bottom of a check.
  • The MICR line is a group of three numbers, which are the check number, account number, and bank routing number.
• Card reader
  • A card reader is a data input device that reads data from a card-shaped storage medium.

The correct answer is Hydrocarbons.

Key Points

• The compounds which are formed by the covalent bond between carbon & hydrogen, are known as hydrocarbons.
• These are also known as 'parent compound'.
• Carbon is placed in the Second period.
• The atomic number of carbon is 6 while the weight is 12.
• Carbon needs 4 electrons to complete the octet state and it is full filled by covalent bonds.

Additional Information

•  Examples of Hydrocarbon.
• Natural Gas:
  • Natural gas contains 97% of Methane.
  • It is a colourless highly flammable gaseous hydrocarbon.
  • It is used as fuel for generating electricity and heat.
  • Natural gas is a compressed form that is used as fuel for vehicles which is known as CNG.
  • This is used for making fertilizers also, mainly ammonia.
• Methane:
  • Methane was discovered by the Italian scientist Alessandro Volta between 1776-1778 while he was studying the gases found in marshy land.
  • Melting Point- -182.5 degree
  • Boiling point- -161.5 degree
  • Methane gas is colourless and is less dense than water.
  • This gas is highly inflammable. While burning with oxygen it has a bluish flame.

The correct answer is Banded Column.

• Banded Column is used in Ms-Word to make the formatting of even columns different from subject columns.

Key Points

• Banded Column 
  • ​Adding colour to alternate columns.
  • Banded columns are available in the Design tab.
  • Excel’s Conditional Formatting feature allows us to apply cell shading to every other row in a worksheet.
• • By selecting the range we want to apply banded columns, and then click Conditional Formatting > New Rule under Home tab.
  • For applying banded columns, we can use this formula =MOD(COLUMN(),2)=0.

​Additional Information

• Banding
  • Adding colour to alternate rows or columns called banding.
  • It can make the data in our worksheet easier to scan. 
• Banded rows
  • The term banded rows are referring to the shading of alternating rows in a worksheet.
  • Excel’s Conditional Formatting feature allows us to apply cell shading to every other row in a worksheet.

The pattern followed here is:

Similarly,

Hence, ODVKOGHMQ is the correct answer.