General Science Questions (MCQs) for Competitive Examinations
General Science Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations. These questions are part of GKToday’s 35000+ MCQs Bank Course in GKToday Android App
1. After whom is the chemical element with atomic number 102 named?
[A] Charles Darwin
[B] Albert Einstein
[C] Alfred Bernhard Nobel
[D] Isaac Newton
Show Answer
Correct Answer: C [Alfred Bernhard Nobel]
Notes:
Alfred Bernhard Nobel was a Swedish chemist, engineer, inventor, businessman, and philanthropist. Atomic number 102 was named after him.
2. Jhum cultivation refers to ____:
[A] Terrace farming
[B] Jamun cultivation
[C] Step farming
[D] Shifting agriculture
Show Answer
Correct Answer: D [Shifting agriculture
]
Notes:
Jhum is a traditional form of shifting cultivation that is common in the North-East of India. Also known as slash and burn agriculture, it is practiced by the tribal groups in Arunachal Pradesh, Meghalaya, Mizoram and Nagaland and the hilly areas of Assam. Jhum involves clearing a piece of land by setting fire or clear felling and using the area for growing crops.
3. In coriander, the useful parts are
____:
[A] Leaves & flowers
[B] Flowers & dried fruits
[C] Roots & leaves
[D] Leaves & dried fruits
Show Answer
Correct Answer: D [Leaves & dried fruits]
Notes:
Coriander (Coriandrum sativum), also known as cilantro, Chinese parsley or dhania, is an annual herb in the family Apiaceae. All parts of the plant are edible, but the fresh leaves and the dried seeds are the parts most traditionally used in cooking.
4. The second Green Revolution aims at increasing agricultural output to promote ____:
[A] Development of rural sector
[B] Availability of easy credit to big farmers
[C] Co-operative farming
[D] Inclusive growth
Show Answer
Correct Answer: D [Inclusive growth]
Notes:
According to 11th Fiver Year Plan, the Second Green Revolution aims to meet the problems of small and marginal farmers for providing income security to a large section of rural households and treating them as partners of development instead of a mere beneficiary of some government schemes or programme.
5. Saprophytes are the organisms which depend for food on
____:
[A] Inorganic chemical compounds
[B] Living plants
[C] Living animals
[D] Dead and decaying material
Show Answer
Correct Answer: D [Dead and decaying material]
Notes:
Saprophytes are the organisms which depend for food on dead and decaying material. They secrete digestive substances into the surrounding environment and break down the organic matter into simpler substances. The nutrients thus produced are absorbed directly through the cell membranes of the organisms.
6. Which gas is major contributor to greenhouse effect?
[A] Chloroflurocarbon
[B] Nitrogen dioxide
[C] Sulphur dioxide
[D] Carbon dioxide
Show Answer
Correct Answer: D [Carbon dioxide]
Notes:
Greenhouse gases that occur both naturally and from human activities include water vapor, carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O) and ozone (O3). These gases contribute to atmospheric warming when they absorb infrared radiation emitted by the solar-warmed Earth and transfer their extra energy to the surrounding atmospheric gases.
7. Typhoid fever is caused by ____:
[A] Virus
[B] Bacteria
[C] Fungus
[D] Allergy
Show Answer
Correct Answer: B [Bacteria]
Notes:
Typhoid fever, also known as typhoid, is a common water borne worldwide bacterial disease, transmitted by the ingestion of food or water contaminated with the feces of an infected person, which contain the bacterium Salmonella Typhi.
8. Grey hair is caused due to
____:
[A] Aging of epidermal cells
[B] Death of dermal cells
[C] Loss of sebum in epidermal cells
[D] Loss of melanin in epidermal cells
Show Answer
Correct Answer: D [Loss of melanin in epidermal cells]
Notes:
The hair follicles have pigment cells that make melanin, a chemical that gives the hair its color. As one ages, these cells start to die. Without pigment, new hair strands grow in lighter and take on various shades of gray, silver, and eventually white.
9. Which one of the following elements is associated with teeth disorder?
[A] Chlorine
[B] Bromine
[C] Iodine
[D] Fluorine
Show Answer
Correct Answer: D [Fluorine]
Notes:
Fluorine is the element that is associated with teeth disorder because the presence of sodium fluoride in drinking water at the level of 2ppm may cause mottled enamel in teeth, skeletal fluorosis, and may be associated with cancer and other diseases. However, topically applied fluoride (toothpaste, dental rinses) has been shown to help reduce dental caries.
10. Rate of cooling depends on the
____:
[A] Nature of the radiating surface
[B] Area of the radiating surface
[C] Temperature difference between the body and the surroundings
[D] All of the above
Show Answer
Correct Answer: D [All of the above ]
Notes:
Newton’s Law of Cooling states that the rate of temperature of the body is proportional to the difference between the temperature of the body and that of the surrounding medium. When a body cools by radiation, then rate of cooling depends on: Nature of the radiating surface, that is, emissivity; Area of the radiating surface; Mass of the radiating surface; Specific heat of the radiating body; Temperature of radiating body and Temperature of the surrounding.
