Search Previous Year Questions

The correct answer is I, III and IV.

Key Points

• Rayon: 
• It is a fibre made of natural sources of regenerated cellulose.
• Its feel and touch are similar to those of silk and are called artificial silk. Hence, statement I is correct.
• It was invented by Georges Audemars.
• Nylon:
• Nylon is a fibre man-made of heavy molecules built up of short, continually repeating sections of atoms.
• Hence, statement III and IV is correct.

The correct answer is citric.

• Orange juice contains citric acid due to which tastes sour.

Key Points

• Fruits that contain citric acid are called citrus fruits.
• Citrus fruits are lemon, lime, orange, Grapefruit, etc.
• The formula of citric acid is C₆H₈O₇.

Additional Information

• Oxalic acid is found in tomato.
• Its formula is C₂H₂O₄.
• Formic acid is found in the sting of ants and bees.
• Its formula is CH₂O₂.
• Acetic acid is found in vinegar.
• Its formula is id CH₃COOH.

The correct answer is Stainless steel.

• Stainless steel is formed by mixing iron with carbon, nickel and zinc.

Key Points

• Stainless steel is an iron alloy and is made of mixing iron with metals like chromium, carbon, nickel, molybdenum, and manganese in appropriate proportions.
• Stainless Steel was invented by Harry Brearley.
• In India, the first Iron and steel plant was set up at Jamshedpur. 
• It was called named Tata Iron and Steel Company Limited (TISCO).

• Differences between Steel and Stainless steel 
• Steel is made by adding iron to carbon which hardens the iron
• Stainless steel has a high chromium content
• The chromium forms an invisible layer on the surface of the steel to prevent it from staining.
• Steel is somewhat stronger than stainless steel

Additional Information

• German Silver is made of mixing Copper (60%), Zinc (20%) & Nickel (20%).
• Bronze is made of mixing Copper (90%) & Tin (10%).

The correct answer is Emulsion.

• An emulsion is a solution in which the suspended particles are liquid droplets and the continuous phase is also a liquid. (The two phases are immiscible).

Key Points

• An emulsion is a mixture of two or more liquids in which one is present as droplets, of microscopic or ultramicroscopic size and is distributed throughout the other.
• These two liquids do not normally mix together.
• Examples of emulsions are paints, hair cream, butter and jellies, etc.

Additional Information

• A gel is a colloid in a more solid form than a solution.
• Aerosols are extremely small solid particles or liquid droplets that are suspended in the atmosphere.

The correct answer is Immigrants.

• Migrants who move into a new place are called Immigrants.

Key Points

• Immigrants are the people who come to a new place or country to live there permanently.

Additional Information

• Emigrants are the people who has gone to live in another country.
• Sheltered people are the ones who acquire shelter given either by the government or native people.
• These people are displaced due to various reasons like natural calamities and war.
• Displaced people are the ones who move from their native place to another place due to some circumstances.

• People who are displaced can also be called sheltered after their settlements.

The correct answer is Assam.

• Ambubachi Mela is a festival of Assam.

Key Points

• Ambubachi Mela:
• It is celebrated at Kamakhya Temple in the month of June.
• It is one of the biggest congregations in eastern India.
• It is the belief that Kamakhya embodies the mother cult, the Shakti.
• The meaning of Ambubachi is spoken with water.
• Other fairs and festival of Assam: Bihu Festival, Me-Dum-Me-Phi, Majuli Festival, Dehing Patkai Festival, Kaziranga Elephant Festival and Ali Ai Ligang Festival.

Additional Information

• Festivals of Mizoram are Chapchar Kut Festival, Mim Kut Festival and Pawl Kut Festival.
• Festivals of Sikkim are Saga Dawa, Pang Lhabsol, Losoong or the Sonam Losar.
• Festivals and fairs of Gujarat are Modhera Dance Festival, Navratri, Madhavrai Fair, Ravechi Fair and Vautha Mela.

The correct answer is vegetative propagation.

• Bryophyllum reproduces by vegetative propagation.

Key Points

• Bryophyllum:
• They reproduce asexually, through the vegetative propagation of leaves.
• They are also called air plants.
• The leaves of bryophyllum are broad, having notches at their margins, these are the locations from which buds arise.
• Vegetative propagation is a reproduction method where new plants are produced by vegetative parts of a plant called propagules.

Additional Information

• In fragmentation, the cell splits into two parts and makes new bodies.

• It takes place in planaria.

• Budding is a form of asexual reproduction in which a new individual develops from a generative anatomical point of the parent organism. 

• It takes place in hydra.

• Spore Formation is a method in asexual reproduction.

• In this, a new individual is formed without fusion with another reproductive cell.

The correct answer is Madhya Pradesh.

• Jawara dance is related to Madhya Pradesh state.

Key Points

• Jawara Dance:
• It is a folk dance of Madhya Pradesh.
• It is mainly performed in the Bundelkhand region among the peasant community.
• It is also known as harvest dance.
• Both male and female participate in the Jawara dance.
• Other folk dances of Madhya Pradesh are Matki, Aada, Khada Nach, Phulpati, Grida Dance, Selalarki, Selabhadoni, Maanch.

Additional Information

The correct answer is Angel Tax.

• In Union Budget 2019, the government eased Angel Tax to encourage start-ups in the country.

Key Points

• Angel tax is the tax that unlisted companies (startups) are liable to pay on the capital they raise through the issue of shares.
• Article 112 deals with the Annual financial statement (Budget).

The correct answer is Shifting Cultivation.

• Shifting Cultivation is also called ‘Slash and Burn’ agriculture.

Key Points

• Shifting Cultivation:
• Shifting cultivation is a model of farming which consists of slash and burn technique.
• In this, the farmers would cut the native vegetation and burn it, then plant crops in the exposed, ash-fertilized soil for two or three seasons.
• In India, it is called Jhum Kheti.

Additional Information

• In plantation agriculture, a single crop is grown for the entire year.
• It is a type of commercial farming.
• In intensive subsistence agriculture, the farmer cultivates a small plot of land using simple tools and more labour.
• The crops grown in this agriculture are consumed by the farmer and his family.
• In Primitive subsistence agriculture, primitive techniques are used to cultivate crops.
• This agriculture is self-sufficient and farmers only grow food for themselves and their families.