Daily Quiz: UPSC Prelims Marathon – November 23

Statement 1 is correct Graphene is a carbon material that is one atom thick. It is the world’s strongest and lightest known material derived from carbon. It has high conductivity and excellent electronic, mechanical, thermal and optical properties.

Statement 2 is incorrect It is a good conductor of heat and electricity. But there is no selfblowing property to grapheme. It is widely used in solar panel.As these have low viscousity, these can be used as lubricant anywhere.

Statement 3 is correct The GraphAir technology grows graphene film in ambient air with a natural precursor, making its production faster and simpler. GraphAir transforms soybean oil – a renewable, natural material – into graphene films in a single step.“Our GraphAir technology results in good and transformable graphene properties, comparable to graphene made by conventional methods.

Air is a homogeneous mixture. However, the Earth’s atmosphere as a whole is a heterogeneous mixture. Clouds are mixture of air and water molecules. That’s evidence the composition is not uniform.

Alloys are made when two or more metals are mixed together. They usually are homogeneous mixtures. Examples include brass, bronze, steel, and sterling silver. Sometimes multiple phases exist in alloys. In these cases, they are heterogeneous mixtures. The two types of mixtures are distinguished by the size of the crystals that are present.

A homogeneous mixture can be a component of a heterogeneous mixture. For example, bitumen (a homogeneous mixture) is a component of asphalt (a heterogeneous mixture).

Acetic acid- Vinegar is mostly dilute acetic acid, often produced by fermentation and subsequent oxidation of ethanol.

Tartaric acid – Tartaric acid is a naturally occurring acid found in many fruits such as grapes, bananas, and tamarinds.

Formic acid- In nature, it is found in certain ants and in the trichomes of stinging nettle (Urtica dioica). Formic acid is a naturally occurring component of the atmosphere due primarily to forest emissions.

Oxalic acid- Members of the spinach family and the brassicas (cabbage, broccoli, brussels sprouts) are high in oxalates.

None of the above mentioned diseases are caused by bacterial infection.

Malaria, Kala Azar, Sleeping sickness and Amoebic dysentery are some diseases caused by Protozoa.

Measles, Ebola, Rabies, Small Pox, Chikungunya, Chicken pox, Foot and mouth, AIDS etc are some diseases caused by Virus.

Examples of some bacterial diseases are, Cholera, Leprosy, Tetanus, Tuberculosis, Typhoid etc.

All the above statements are correct.

Antibiotics, also known as antibacterials, are medications that destroy or slow down the growth of bacteria. Infections caused by viruses, such as colds, flu, most coughs, and sore throats cannot be treated with antibiotics.

India became Polio free in 2013. Small Pox was eradicated long back.

A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.

The reasons for the sharp increase in antibiotic use are as follows:

• The high disease burden.
• The rising income.
• The easy and the cheap availability of these medicines to the public.
• The uncontrolled sales of antibiotics.
• Poor public health infrastructure.
• Lack of awareness regarding the misuse of antibiotics.

IRNSS is an Independent regional navigation satellite system being developed by India. IRNSS provide two types of services, namely, Standard Positioning Service (SPS) which is provided to all the users and Restricted Service (RS), which is an encrypted service provided only to the authorized users.

Applications of IRNSS are:

• Terrestrial, Aerial and Marine Navigation

• Disaster Management

• Vehicle tracking and fleet management

• Integration with mobile phones

• Precise Timing

• Mapping and Geodetic data capture

• Terrestrial navigation aid for hikers and travelers

• Visual and voice navigation for drivers