SSC -Science 2 September 2016" Set 1

1.    During which of the following operating conditions of an automobile, carbon monoxide content in exhaust gas is maximum?


1) Acceleration
2) Cruising
3) Idle running
4) Deacceleration

2.    A galvanometer can be converted into a voltmeter by connecting with it a 
1) high resistance in parallel
2) low resistance on parallel
3) high resistance on series
4) low resistance in series

    

Exp- A galvanometer is a kind of antique instrument designed to measure weak currents. ... Galavnometer is the device which gives response on electric current where voltmeter gives response to potential difference.the galvanometer is the device used for detecting the presence of small current and voltage or for measuring their magnitude.

    

3.    .Even after sunset, the air near the Earth's surface continue to receive heat due to
1) Insolation
2) Terrestrial Radiation
3) Conduction
4) Convection

4.    The largest artery in human body is
1) Aorta
2) Capillary
3) Vena cava
4) Pulmonary vein

5.An eudiometer measures

1) Atmospheric pressure
2) Time
3) Volume of gases
4) Vapour pressure

6 .Trinitrotoluene is

1) used to melt metals
2) used to fuse two metals
3) used as an abrasive
4) used as an explosive

7.One of the leading producers of asbestos in the world is
1) Australia
2) Russia
3) Canada
4) Armenia

8.Nitrification is the biological process of converting


1) N2 into nitrate
2) N2 into nitrite
3) Ammonia into nitrite
4) Ammonia into N2

Oxidation of ammonia to nitrate. Nitrification in nature is a two-step oxidation process of ammonium(NH₄⁺) or ammonia (NH₃) to nitrate (NO₃⁻) catalyzed by two ubiquitous bacterial groups.