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What is the oxidation number of the phosphorus in PF3?

3 is the oxidation state of phosphorus in PF3.

Ground nut

The earth orbits around the sun without losing energy as the total energy of an orbiting systems is a combonation... View Article

While dusting a carpet we beat it with a stick because due to inertia of rest, the dust particles does... View Article

Bast fibre is also known as skin fibre or phloem fibre which is used for making ropes and mats.

Argon has atomic number 18. i.e number of electrons = 18 and in the same way K+ = 19 –... View Article

A virtual, erect and enlarged image of an object is formed when it placed between F and O.

The number of electrons emitted per second i.e. the rate of emission depends upon

Ichthyology is also known as fish science is devoted to the study of fish.

Law of definite proportions is also known as law of constant composition.

The light coming from an object enters the eye through cornea and pupil.

The relation between acceleration, mass and force is given by: F=ma Force = Mass x acceleration As per Newton’s second... View Article

India receives about 5,000 trillion kWh of solar energy every year.

Hauz Khas tank was built in Delhi which present in Indian state.

The P-P-P bond angle in a tetrahedral P4 molecule is only 60o.

Sugarcane is associated with a disease called red rot.

XeF2, XeF4 and XeF6 are known compounds of Xenon.

There is no known compound of Ar and F2 as yet.

1 J = 0.24 cal as 1 cal is 4.2 J

The three main parts of a cathode ray tube are Electron gun, Deflecting system and Fluorescent screen