From which part of turmeric, is the turmeric powder obtained?
Dried rhizome
Dried root
Dried fruit
Seed
A.
Dried rhizome
Turmeric is obtained from the plant Curcuma longa which is a perennial herbaceous plant. Turmeric powder is obtained from the underground stem called the dried rhizome of the plant. Turmeric is used in Asian dishes and it also has medicinal value.
A beautiful rainbow on the sky is due to the
dispersion of sunlight from a water droplet only
reflection of sunlight from a water droplet only
reflection and refraction of sunlight from a water droplet only
refraction, dispersion and reflection of sunlight from a water droplet
Which of the following labeled points in the figure given above indicate the unstable state of an object?
Point A only
Point B only
Points A and C
Points B and D
Rays of light get refracted while passing from air to glass because
density of glass is higher than that of air
they cannot be reflected from a glass surface
glass absorbs energy from the light rays
speed of light in glass is less than the speed of light in air
Bats can know about their prey at a distance even in the night by emitting
infrared lights
ultraviolet lights
chemicals from their body
ultrasonic sounds
The ceilings of a concert hall are generally curved
because they reflect the sound to the audience
because they can absorb noise
to have better aeration in the hall
as any sound from outside cannot pass through a curved ceiling
White light while passing through a glass prism breaks up into light of different colours because
refractive index of glass for different colours of light is different
glass prism absorbs white light and emits lights of several colours in different directions
of total internal reflection of white light on surfaces of the prism
of the interference of different colours inside the prism
A pressure cooker works on the principle of
elevation of boiling point of water by application of pressure
making the foodgrains softer by application of pressure
making the foodgrains softer by application of pressure and temperature
keeping the foodgrains inside steam for a longer time
The presence of sulphur in gunpowder
decreases the ignition temperature
increases the final temperature
increases explosiveness of the gunpowder
makes the powder smokeless
Pressure of a gas increase due to increase of its temperature because at higher temperature
gas molecules repel each other more
potential energy of the gas molecules is higher
kinetic energies of the gas molecules are higher
gas molecules attract each other more
