Science GK Questions in English One Liners (SSC, Railway)
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# Acute lead poisoning is also known as?
# Itai-itai~cadmium poisoning
In a reaction, loss of hydrogen by substance is called as oxidation.
Metal oxides are said to be basic oxides.
All acids have similar chemical properties.
*Cheese is an example of colloidal solution of
liquid in solid.
Colloidal solution- a mixture in which substances (a minutely small material) are regularly suspended in a fluid.
Types of Colloidal Solution:
Foam- gas in a liquid e.g.- shaving cream
Emulsion- combination of liquids. milk
*Sol- when a solid is evenly dispersed throughout a fluid.
paint, blood and silver aquasol.
Hydrogen chloride is diatomic.
>composed of only two atoms.
Rickets is caused by deficiency of Vitamin D.
*During exhalation, the ribs move downwards.
On an average 5 – 5.5 million Red Blood Cells are present in a healthy human adult man per cubic mm (mm3) of blood.
#A tadpole develops into an adult frog by metamorphosis process.
*Light sensitive cell gets activated upon illumination and generates electrical signal.
Brain & spinal cord constitutes the central nervous system in human body.
Convention/Protocol - Topic
*Basel Convention - Hazardous waste dumping
Montreal Protocol - Ozone layer
*Kyoto Protocol - Greenhouse gases
Grazing food chain is: Grass > Rabbit >Fox
>In grazing food chain: energy in the lowest trophic level is derived from photosynthesis.
The splitting of white light into its component colours is called dispersion.
*Change in magnetic field produces induced current.
*Flow of current in a conductor produces magnetic field.
*Magnetic field related to coil can be produced by motion between conductor and coil.
Hydrogen gas is used as a fuel in a rocket.
*Pure silicon and germanium are poor conductors of electricity.*cadmium- excellent electric conductor.
Mercury is a base metal of amalgam alloy.
# The structure of graphite is hexagonal.
*Tartaric acid is the most abundant acid found in grapes.
Vitamin A is the most abundant Vitamin found in carrot.
# The rate of absorption of water through roots can be increased by keeping the plants under the fan.
*A spore producing plant is bread mould.
The human eye forms the image of an object at its retina.
*Fungi, Spirogyra and Hydra are the multicellular organism.
>Paramecium is NOT a multicellular organism.
*>A paramecium is a unicellular living organism that can move, digest food, and reproduce. It belong to the kingdom of Protista.
* Taiga is an example of forest ecosystem.
>A forest ecosystem consist of- all plants, animals and micro-organisms functioning together with all of the non-living physical factors of the environment.
# The second most abundant element on Earth’s crust is silicon.
Oxygen- 1st (46.6%)
Silicon - 27.7% _second most
*Taj Mahal is suffering from “Marble Cancer” because of sulphur dioxide.
The accumulation of non-degradable chemicals progressively at each trophic level is called biological magnification.
Three (3) types of ecological pyramids are present in ecosystem. They are Pyramid of number, biomass and Energy.
_____________________________________________Pyramid of number_ an upright pyramid
Pyramid of biomass
>measured in grams of dry mass per square metre (g m –2), >Biomass decreases at each ascending level of the food chain.
Pyramid of Energy_always upright
Fuse is generally placed in series with the device.
*A rectangular coil of copper wire is rotating in a magnetic field. The direction of the induced current changes once in each half revolution.
Noise is measured in decibel.
Aqua Regia is a mixture of concentrated hydrochloric acid and concentrated nitric acid.
[HNO3 & HCl~ 1:3]
The mass of 4 mole of aluminum atoms is 108 grams.
[An atom of aluminum has 13 protons, 14 neutrons]
Alpha particles were made to fall on a thin gold foil by Ernest Rutherford.
Vitamin K helps in clotting of blood.
During heavy exercise, breathing rate in an average adult person can increase upto 25 per minute.
Each sperm is single cell.
External fertilisation takes place in frog.
Fertilisation is necessary in sexual reproduction but not necessary in asexual reproduction.
*Excessive curvature of the eye lens is the cause of arise of myopia.
>Myopia_you can see objects near to you clearly.
>images in front of retina instead of on retina
>Excessive curvature_myopic eye has too much focusing power.
>lens of eye is convex.
# Worms multiplies very slowly in comparison to others.
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1.The natural interconnection of food chains makes it a food web
2. The base of Ecological pyramid represents the ______ or the first trophic level while the apex represents______ or top level consumer.
3.*The pyramid of biomass in sea is also generally inverted because the biomass of fishes far exceeds that of phytoplankton.
>Pyramid of energy is always upright, can never be inverted.
>Pyramid of number_ an upright pyramid
>Ecological pyramid does not take into account the same species belonging to two or more trophic levels. It assumes a simple food chain, it does not accommodate a food web.
4.Ecological succession is the process of change in the species structure of an ecological community over time.
>The gradual and fairly predictable change in the species composition of a given area
5. A nutrient cycle (or ecological recycling)~ movement and exchange of organic and inorganic matter back into the production of matter. Energy flow is a unidirectional and noncyclic pathway, whereas the movement of mineral nutrients is cyclic.
Quiz 4: Science GK Questions One Liners (SSC, Railway) Reviewed by Admin on June 23, 2019 Rating: