1.
An element that does not occur in nature but can be produced artificially is
Answer: Option 'B'
Plutonium
2.
An atom of an element with mass number 23 and atomic number 11 will have:
Answer: Option 'C'
11 protons, 12 neutrons and 11 electrons
3.
Amount of water vapour (gaseous) in a given volume of air (Cubic Meter) is known as ?
Answer: Option 'D'
Absolute Humidity
4.
Alzheimer's disease in human beings is characterised by the degeneration of?
Answer: Option 'D'
Nerve cells
5.
Alcohol prepared by the distillation of wood is ?
Answer: Option 'C'
Methyl Alcohol
6.
it blows over the barren land
Answer: Option 'B'
it contains maximum content of water vapour
7.
All the ecosystems taken together in a geographical area form a bigger unit called?
Answer: Option 'D'
Biosphere
8.
Among terrestrial (land) animals, which animal has the longest gestation period?
Answer: Option 'C'
Elephant
9.
An alloy used in making heating elements for electric heating devices is
Answer: Option 'D'
Solder
10.
An eardrum is absent in
Answer: Option 'A'
snakes