1.
The hardened material available on earth is
Answer: Option 'B'
Diamond
2.
If a tropical rain forest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because
Answer: Option 'A'
The soil of rain forest is deficient in nutrients
3.
Which of the following has got more heat capacity?
Answer: Option 'C'
Water
4.
The radioactive element most commonly detected in humans is
Answer: Option 'A'
potassium-40
5.
The Mudumalai National Park is located in which state ?
Answer: Option 'A'
Tamil Nadu
6.
Suppose if we measure the time lapse between the two Sunsets by sitting in the beach , from this we can estimate
Answer: Option 'A'
The radius of the earth
7.
Potassium Permanganate is used for purifying drinking water, because
Answer: Option 'D'
it is an oxidising agent
8.
What is the scientific name for washing soda?
Answer: Option 'A'
Sodium carbonate
9.
The filament of an electric bulb is made of
Answer: Option 'C'
tungsten
10.
How many years it takes for Pluto to Orbit the Sun?
Answer: Option 'D'
It takes 248 yrs for Pluto to orbit the Sun.
11.
Fuse Wire is Made of?
Answer: Option 'C'
an alloy of Tin and Lead
Fuse Wire is Made of an alloy of Tin and Lead. If too high a current flows, the element rises to a higher temperature and either directly melts, or else melts a soldered joint within the fuse, opening the circuit. Thefuse element is made of an alloy of Tin and Lead to provide stable and predictable characteristics.
12.
Of the following, which element is common to all acids
Answer: Option 'A'
hydrogen
13.
Radio Carbon Dating is use to estimate the age of _____ ?
Answer: Option 'C'
Fossils
14.
The Ozone Layer restricts from
Answer: Option 'C'
The Ozone layer which is present in the Earth's atmosphere protects it by restricting from UV or Ultraviolet radiation, the dangerous rays contained by Sun.
15.
Which one of the following types of laser is used in laser printers?
Answer: Option 'A'
Semiconductor laser
16.
Seawater (i.e. saltwater) freezes at:
Answer: Option 'B'
at a slightly lower temperature than fresh water.
17.
The amount of water vapour in the air is called...?
Answer: Option 'B'
humidity
18.
The Rain Shadow Effect is associated with
Answer: Option 'D'
Orographic precipitation or Rain produced when moist air is lifted as it moves over a mountain range. As the air rises and cools, orographic clouds form and serve as the source of the precipitation, most of which falls upwind of the mountain ridge. Some also falls a short distance downwind of the ridge and is sometimes called spillover. On the lee side of the mountain range, rainfall is usually low, and the area is said to be in a Rain Shadow.
19.
The intencity of Earthquakes is measured on
Answer: Option 'A'
Mercalli scale
20.
The first synthetic fibre made by man was ____ ?
Answer: Option 'C'
Nylon