Explore topic-wise InterviewSolutions in Current Affairs.

a. Green energy – green energy is the energy produced from natural resources that do not cause environmental pollution Brown energy – Energy from petroleum, coal, etc., and nuclear energy. 

b. Green energy: solar cell, tidal energy, electricity from water, windmill. Brown energy: nuclear reactor, diesel engine, thermal power station. 

c. i. Install biogas plants 

ii. Use solar panels

a. Nuclear fusion 

b. E = mc² m = lg

= \(\cfrac{1}{1000}\times 3 \times 10^8 \times 3 \times 10^8\)

= \(\cfrac{9 \times 10^{16}}{10^{3}}\) = 9\(\times 10^{13}\) \(J\)

c. Continuous fission reaction ends in an explosion (atom bomb). 

d. Energy crisis and industrial growth promote production of energy.

Doob ( Cynodon dactylon), Kentucky bluegrass (Poa pratensis), Zoysia, Tall fescue etc.

1. Cabbage, cauliflower, 

2. broccoli, knol khol.

Flowing water -Hydroelectric power station. Nuclear energy – Nuclear power station Coal – Thermal power station

Correct option is: A. Schema

Correct option is: A. Alter

Correct option is: C. DCL

Jawahar, Mrinalini, Banjaran, Kiss of Fire, Dr B P Pal, Raktagandha, Raja Surender Singh of Nalagarh, Tata Centanary, Priyadarshini, (HT), Himangini, Prema, Sadabahar, Kiran, Chandrama etc.

Spinach, amaranth, palak, methi etc.

Karnataka ,West Bengal ,Jammu and Kashmir

Avenue tree – Cassia fistula (Amaltas), Erithrina indica (Coral tree), Delonix regia (gulmohar) etc. 

Two bushes – Lawsonia indica, lavender, Camellia, rose etc..

Pleurotus florida(37.19% protein content)

Herbisides are used to control bacteria,yeasts and molds growth to increase shelf age of flowers

Trees grown in avenue gardening –Poplar, Beech, Lime or horse chest nut

Advantage of vermicompost like it improves soil health ,it is cheap and chemical free, it increases the activity of beneficial microbes in soil or it provides a number of nutrients to plants.

Trichoderma is effective biological mean for plant disease management. Trichoderma is a fungicide. It reduces growth, survival or infections caused by pathogens

Sterilization is the process where food item is heated to very high temperature for a short duration. Food is heated at 72° C for 15 seconds or 138° C for 2-3 seconds in the sterilization process. 

How sterilization process helps Rampal: 

Due to sterilization the harmful bacteria which lead to spoilage of the milk, got killed. This resulted in storage the milk for a longer duration. As the duration was increased the problem of spoilage of milk during the transportation got resolved.

Age of the first Cow 

Number of rings in the horn i.e. N= 2 

Therefore, Age of the cow = N + 2 = 2 + 2 = 4 Years 

Age of second Cow = N + 2 = 3 + 2 = 5 Years

The waste material which generates from the natural resources and which can decomposes naturally is called as biodegradable waste. 

To manage the biodegradable waste, Rampal prepared a vermicomposting bed and started collecting all the natural waste like grass, fodder, dung and urine from animals, stale food in it. The waste got decomposed due to the verm. He started using the vermicomposting as organic manure in his farm which increased his crop yield.

Sun is the major source of energy available in earth, during photosynthesis the light energy is converted into chemical energy and is stored in plant cells. Since this plant reaches in animals as food, the stored energy reaches in animals too. The remainings of the animals hurried in earth transforms under high pressure and temperature and becomes fuels. Write drama using these hints.

a. Hydrogen bomb: Nuclear fusion Atom bomb: Nuclear fission

b. Solar energy: Green energy Nuclear energy: Brown energy

Green energy is the energy produced from natural sources which does not cause environmental pollution. Hence it is known as clean energy.

The mechanical energy required can be provided by engines operating on fuels such as diesel, petrol, natural gas, etc. or via renewable energy sources such as a wind turbine, water turbine, solar-powered turbine, etc

LNG – Methane 

LPG – Butane

Solar energy is the ultimate energy source. All energy sources are related and connected with solar energy in one or the other way. Expand these points and complete the essay.

Enriched Uranium used in a nuclear reactor as a fuel.

Hydrogen used as fuel in rockets.

Mechanical energy → Electrical energy

The combustion rate is very high for hydrogen, the possibility of explosion is also more. And it is also difficult to store hydrogen.

Another reason why care should be taken during storage is that LPG vapor is heavier than air, so any leakage will sink to the ground and accumulate in low lying areas and may be difficult to disperse. LPG expands rapidly when its temperature rises

Immediately open all the doors and windows to your house so that the gas can escape. Never open electrical fans or even an exhaust fan. Let the gas escape naturally. Once you do that, go outside the house and isolate the main electric supply. Be sure to evacuate yourself and others from the area.

Bauxite, Others are types of coal.

It is usually advised not to switch on or off any of the electric switches if you detect a gas leakage. It is because the fumes of gas are highly flammable and even smallest of sparks can ignite a huge fire.

Ethyl mercaptan

Petrol (or gasoline), naptha, kerosene, diesel oil, lubricating oil, fuel oil, grease wax, and some residue.

The smell of LPG is felt

• Sufficient sunlight should be available in the rooms during day time. 
• Comfortable warmth, coolness and air circulation must be available without the help of electricity. 
• Using the sun for heating through south facing windows during the winter lowers heating costs. Shading those same windows in summer lowers cooling costs. 
• Grid-tied solar photovoltaic (PV) panels currently provide the most cost- effective form of renewable energy for a zero energy home.
• Fresh filtered air and moisture control are critical to its success. This need for ventilation has a silver lining.

The cooking gas that we get in cylinders for domestic use is LPG.

Correct answer is: c. Nuclear energy

Correct answer is: c. biogas

Answer: They have the same specific rotation

Enantiomers are chiral molecules that are mirror images of one another. Furthermore, the molecules are non-superimposable on one another. This means that the molecules cannot be placed on top of one another and give the same molecule. Chiral molecules with one or more stereocenters can be enantiomers. Hence they have equal but opposite specific rotation.

According to Einstein’s equation E = mc² . 

The amount of energy produced is high, even though the transformed mass is very less. Here’ represents the converted mass, c is the speed of light (3 x 10⁸ m/s) and E is the amount of energy obtained.

1. A box with blackened interior: 

The black color of the vessel lets it to absorb more heat as dark colors absorb more heat. 

2. A glass cover for the box: 

The glass lid will allow the light and heat energy of the sun to come inside but the light energy will go out but the heat will be trapped inside the cooker to cook food. 

3. A mirror outside the each: 

The plane mirror will reflect the maximum light of the Sun inside the cooker.

a. Hydrogen

b. 150000 kj/kg

c. Coal, petrol, hydrogen.

d. Petrol. Easy to handle: less atmospheric pollution, Calorific value is high.

Advantages:

• Eco-friendliness 
• Maintain better air quality indoors, reduce carbon monoxide emissions 
• Less expensive 
• Don’t cause any environmental pollution

 Limitation:

• Cooking with solar cookers obviously requires sunlight, which makes it difficult to use during winter months and on rainy days. 
• Cooking also takes a significantly longer time compared to conventional methods. 
• Solar cookers are not as efficient at retaining heat as conventional cooking devices. Factors such as wind,  rain, and snow can seriously hinder operation, and in such weather conditions, even after the food is cooked, it  will lose its warmth very quickly.

a. Heat energy, Light energy. 

b. Electrical energy can be easily converted into many other forms. 

c. Small increase in population cause large increase in the use of energy consumption, mechanization will lead to excessive use of sources of energy and leads to energy crisis

Nuclear fusion, nuclear fission.

Those materials for which stress vs strain variation is not a straight line within elastic limit are called elastomers. e.g. Rubber, tissue of aorta.