Questions

Sukhna Lake is in Chandigarh, India.

It is a reservoir at the foothills of the Himalayas. It covers an area of 3 km². This rainfed lake was created in 1958 by damming the Sukhna Choe, a seasonal stream coming down from the Shivalik Hills.

We know that polar substances are soluble in polar solvents and non polar substances are soluble in non-polar solvents only. Here the hydrocarbons are non-polar molecular substances and water is a polar solvent. So water can't dissolve hydrocabons.

Hence, as hydrocarbons are non-polar substances, they are insoluble in water as it is a highly polar solvent. 

India has been ranked 45th, down four notches from last year, in terms of competitiveness in the annual rankings compiled by IMD which saw Hong Kong topping the list. US was “pushed out” of the top three slots while Hong Kong consolidated its dominance of the annual rankings for the second year in the list compiled by the International Institute for Management Development’s (IMD) World Competitiveness Center.

A big bed of rock salt with the top portion of the bed containing potash (though not the variety used as ferilizer) has been discovered in Thar Desert at a depth of 100 metres. A massive belt of lead and zinc has been found in the Agucha area, while gold bearing rocks have been discovered in the Tuensang district of Nagaland.

A colored ion generally indicates a transition metal.

Valentina Tereshkova is the first woman to have flown into space