General Science problems
- 1. Choose the correct order of electrical resistivity of metals.
Options- A. Ag > W > Ni > Hg
- B. Hg > Ni > W > Ag
- C. Ag > Ni > Hg > W
- D. Ag > W > Hg > Ni Also asked in: AIEEE, Bank Exams, CAT
Correct Answer: Hg > Ni > W > Ag
- 2. What is the accepted average Calorie requirement for rural area in India?
Options- A. 2100
- B. 2200
- C. 2300
- D. 2400 Also asked in: AIEEE, Bank Exams, CAT
Correct Answer: 2400
- 3. Auxiliary bud develops into which of the following part of the plant?
Options- A. Fruit
- B. Leaf
- C. Branch
- D. Roots Also asked in: AIEEE, Bank Exams, CAT
Correct Answer: Branch
- 4. The largest source of pollution in the world is
Options- A. herbicides and insecticides
- B. Automobile exhausts
- C. Sewage and garbage
- D. Industrial effluents Also asked in: Bank Exams
Correct Answer: Sewage and garbage
- 5. Term ?Visible Horizon? in astronomy is defined as:-
Options- A. The circle of contact of the earth and the cone of visual rays passing through the meridian of the place.
- B. The circle of contact of the earth and the cone of visual rays not passing through the meridian of the place.
- C. The circle of contact of the earth and the cone of visual rays passing through the point of observation.
- D. The circle of contact of the earth and the cone of visual rays not passing through the point of observation. Also asked in: Bank Exams
Correct Answer: The circle of contact of the earth and the cone of visual rays passing through the point of observation.
Explanation:
Visible Horizon is the circle of contract, with the earth, of the cone of visual rays passing through the point of observation.
- 6. Limonitic ore is the ore of which metal?
Options- A. Iron
- B. Aluminium
- C. Zinc
- D. Cobalt Also asked in: Bank Exams
Correct Answer: Iron
Explanation:
Limonite is one of the two principal iron ores, the other being hematite, and has been mined for the production of iron.
- 7. Which one of the following gases is released mostly from landfills in urban areas?
Options- A. Nitrogen
- B. Hydrogen
- C. Methane
- D. Oxygen Also asked in: Bank Exams
Correct Answer: Methane
Explanation:
Decomposing waste in the landfills, by the action of microorganisms, produce methane and carbon dioxide. Landfill gas consists of 40-60% of methane and rest is carbon dioxide. Trace amount of volatile organic compounds (<1) are also present which mainly comprise of hydrocarbons.
- 8. Which one of the following is most sensitive to environmental change?
Options- A. Amphibian
- B. Reptile
- C. Mammal
- D. Insect Also asked in: Bank Exams
Correct Answer: Amphibian
Explanation:
Amphibians are one of the most sensitive groups to change, whether that is caused by habitat loss, invasive species, disease, trade or climate change. Their sensitivity to environmental threats has been generally linked to the observation that amphibians are characterized by a rather permeable skin. Given their complex life cycles and other traits, amphibians are often recognized as indicators of ecosystem health.
- 9. The HIV virus weakens the immunity of a person because it destroys
Options- A. mast cells
- B. platelets
- C. erythrocytes
- D. lymphocytes Also asked in: Bank Exams
Correct Answer: lymphocytes
Explanation:
The HIV virus continuously invades and destroys T-cells (lymphocytes). Eventually the body can't replace the T-cells fast enough, and the immune system deteriorates. When the immune system has deteriorated to the point that it is unable to fight off diseases, a person is diagnosed with AIDS.
- 10. Which one of the following air pollutants combines with the haemoglobin of human blood and reduces its oxygen-carrying capacity, leading to suffocation and may cause even death?
Options- A. Chlorofluorocarbon
- B. Fly ash
- C. Carbon monoxide
- D. Sulphur dioxide Also asked in: Bank Exams
Correct Answer: Carbon monoxide
Explanation:
Carbon monoxide (CO) is very dangerous because it binds with the haemoglobin more efficiently than oxygen does. It "hogs the seats" so that oxygen can't get a ride. And those CO molecules keep riding around, never giving their seats up to the oxygen. This means there is no way to get oxygen to the brain, heart, or other cells and those cells start to die. And finally, it leads to suffocation and even death of a person.
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