SSC -Science 1 September 2016" Set 2

1.Which is the heaviest metal among the following?

1) Gold
2) Silver
3) Iron
4) Copper

10 Heaviest Elements

Sl. No. Element Symbol Density* 1 Osmium Os 22.59 2 Iridium Ir 22.56 3 Platinum Pt 21.45 4 Rhenium Re 21.02 5 Neptunium Np 20.45 6 Plutonium Pu 19.82 7 Gold Au 19.29 8 Tungsten W 19.25 9 Uranium U 19.05 10 Tantalum Ta 16.67

2.Which of the following uses the spawn mechanism to duplicate itself ?

1) Trojan horse
2) Worm
3) Keystroke logger
4) Logic bomb

Worms Click here

3.Sun appears red in colour at sunrise and sunset due to

1) the fact that sun emits only red colour at that time 
2) red light having longer wave length scatters away 
3) that sun comes out of the mountains  
4) that all other colours scatter away except red

4.What is the main purpose of white blood corpuscles?
1) to carry nutrients
2) to combat infection 
3) to carry oxygen 
4) to give strength

5. The layer where the decrease in temperature with increasing altitude is totally absent is

1) Troposphere
2) Ionosphere
3) Stratosphere 
4) Mesosphere

6. At hill stations, the boiling point of water will be

1) same as at sea level 
2) less than that at sea level 
3) more than that at sea level
4) equal to the melting point of ice

7. Siderosis is a disease caused by the inhalation of 

1) silica dust
2) iron dust 
3) zinc dust
4) coal dust

8. Which of the following is used as anaesthetics?

1) N2
2) N2O
3) CH4
4) CO2

9.Clove is obtained from 

1) Root
2) Stem
3) Leaves

4) Flower buds

10. What is Dakshin Gangotri ?

1) River valley in Andhra Pradesh 
2) Unmanned station located in Antarctica 
3) Second source of River Ganga 
4) Island in the Indian Ocean

11. Japan is called the 'Land of the rising sun' because

1) Sun rises there as soon as it sets
2) Sun always remains in the eastern part of the sky throughout the day in Japan
3) Japan being the Eastern most country in the world, it has the earliest sunrise 
4) The rays of the sun get reflected from the waters of the sea and make the sunrise beautiful in Japan