Questions

An acid can be defined as a molecule or other species which can donate a proton or accept an electron pair in reactions.

(OR)

A substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind.

All  are  correct.  Preamble  is  non-justiciable    in    nature    i.e.    its provisions  are  not  enforceable  in court of  law.  Preamble  is  neither  a source of power to legislature nor a prohibition   upon the   powers   of legislature.

In urban areas, rain water available from roof tops of buildings, paved and unpaved areas goes waste. This water can be recharged to aquifer and can be utilized gainfully at the time of need. In areas where the surface soil is impervious and large quantities of roof water or surface runoff is available within a very short period of heavy rainfall, the use of trench/ pits is made to store the water in a filter media and subsequently recharge to ground water through specially constructed recharge wells.

Gully plugs are built using local stones, clay and bushes across small gullies and streams running down the hill slopes carrying drainage to tiny catchments during rainy season.It is applicable only in rural areas.

National Rural Employment Guarantee Act 2005 (NREGA later renamed as the "Mahatma Gandhi National Rural Employment Guarantee Act", MGNREGA), is an Indian labour law and social security measure that aims to guarantee the 'right to work'.

The Basic Speed Law states that you must never drive faster than is safe for present conditions, regardless of the posted speed limit.

For example, if you are driving 60 kmph in 45 kmph zone, you are not in safe driving and you just not following the speed law.