P-1 Chemical reactions and equations — Science STD 10 — Question

Which device is used to measure p.d.?

How does the chemical reactivity of the halogens vary on going down in group 17 of the periodic table?

Name the spherical mirror which can produce a real and diminished image of an object.

Give the name and structural formula of one member of the following:
Alcohols.

What property of the filament wire accounts for this difference?

Which one term in the following includes the other three?
Adrenalin, insulin, hormone, thyroxine, estrogen.

Which electric heating devices in your home do you think have resistors which control the flow of electricity?

Arrange the following fuels in the order of increasing calorific values (keeping the fuel with lowest calorific value first):
LPG, Coal, Alcohol, Dung cakes, Diesel

Name one chemical compound which can be used to distinguish between ethanol and ethanoic acid.

A coin in a glass tumbler appears to rise as the glass tumbler is slowly filled with water. Name the phenomenon responsible for this effect.