General Science & Technology Questions & Answers: GK, Current Affairs, Questions, Trivia and News

Why Carbon is used in making of steel?

Because it works as a hardening agent. So, basically the impurity of Carbon in Iron stops the dislocation of the Iron atoms in the lattice from sliding past one another. The amount of this impurity is used to control the hardness, ductility and tensile strength. The Steel which has Carbon as alloy is called “Carbon ..

How Old is Moon?

The Age of the Moon predicted to ~ 4.36 Billion Years   Scientists claimed that the Age of the moon: ~ 4.36 billion years, i.e. nearly 200 million years less than what earlier predicted. Thus, the moon could be younger than earlier thought, as per the Scientists.   Existing Theory: The existing theory of the ..

What are differences between Resourcesat I and Resourcesat II?

The Resourcesat was launched  via the PSLV C-16 on 20.4.2011 . Resourceset-2 will be able to collect data from a wider strip of the Earth’s surface in comparision to Resourcesat I. The profile page of Resourcesat-2 on ISRO website mentions that Important changes in RESOURCESAT-2 compared to RESOURCESAT-1 are: Enhancement of LISS-4 multispectral swath from ..

Give some examples of Bio-fertilizers?

There are five biofertilizers viz. Rhizobium, Azotobacter, Azospirillum, Phosphate Solubilizing Bacteria and mycorrhiza , which have been incorporated in India’s  Fertilizer Control Order (FCO), 1985.  Rhizobium, Azotobacter, Azospirillum and blue green algae(BGA) have been traditionally used as Biofertilizers. Rhizobiuminoculant is used for leguminous crops such as pulses. Azotobacter can be used with crops like wheat, ..

When Ice floating in water dissolves, what will be impact on the level of water when the ice melts away completely?

There are two dimensions of this experiment. One is when Ice floats in water and another is as mentioned in the question. When Ice floats in water, the level of water will remain unchanged when the ice melts away because in this situation, Ice replaced water which is ""equal to its weight"". But when the ..

What are the Polymetallic Modules (PMN) made up of?

Recently, India became the first pioneer investor to have been allotted a site of 1,50,000 sq km in the Central Indian Ocean Basin (CIOB) by International Sea Bed Authority (ISBA) of United Nations for harnessing the Polymetallic Modules (PMN) lying on the seabed. The Polymetallic Modules (PMN) predominantly contain Manganese. They are made up of ..

What is used to store acetylene?

Acetylene cannot be safely pressurized as a pure compound. Acetone is used for safe storage and transportation of Acetylene. Vessels containing a porous material are first filled with acetone followed by acetylene, which dissolves into the acetone. One liter of acetone can dissolve around 250 liters of acetylene.

Why there are colors in the fine cut diamond?

Pure diamond should transmit visible light and appear as a clear colorless crystal. Colors in diamond originate from lattice defects and impurities. The diamond crystal lattice is exceptionally strong and only atoms of nitrogen, boron and hydrogen can be introduced into diamond during the  growth at significant concentrations (up to atomic percents). Nitrogen gives yellowish ..