Questions

Compounds are substances is true about them.

Area near active volcano or lake beds are best areas that lends itself to the formation of fossils.

The only active volcano in India is situated in Andaman-Nicobar islands.

The main purpose of balancing chemical equations is to make the mass of reactants is equal to mass of products obtained after the reaction. Hence, to make law of conservation of mass is purpose of balancing chemica equations.

Bachendri Pal, an employee of Tata Iron and Steel Co. Ltd at Jamshedpur, became the first Indian and the fifth woman in the world to reach the summit of Mt. Everest on May 23, 1984.

Refractive Index of glass with respect to water can be calculated by 

(Refractive Index of glass with respect to air) × (1/Refractive Index of water with respect to air)

We know that,

Refractive Index of glass with respect to air = 4/3

Refractive index of water with respect to air = 3/2

Hence, Refractive Index of glass with respect to water = (4/3) x (2/3) = 8/9.

Nigeria, an African country on the Gulf of Guinea. 

Nigeria has a Federal Republic and Presidential system of Government.