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WorksheetsGen Chemistry (1)
Total questions: 20
Worksheet time: 15mins
The nucleus of an atom consists of
electrons and neutrons
electrons and protons
protons and neutrons
All of the above
The number of moles of solute present in 1 kg of a solvent is called its
molality
molarity
normality
formality
The most electronegative element among the following is
sodium
bromine
flourine
oxygen
The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called
granite
basalt
igneous rock
sedimentary rock
The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is
Dalton's law
Gay Lussac's law
Henry's law
Raoult's law
The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is
helium
ozone
oxygen
methane
The most commonly used bleaching agent is
alcohol
carbon dioxide
chlorine
sodium chlorine
The Latin word formica means ant. The name formic acid is derived from this Latin word because
this acid, in ancient times, was used to eliminate ant-hills
this corrosive acid is secreted by ants to drive away their enemies
this acid was first obtained by the distillation of ants
ants are attracted by the odour of this acid
The inherited traits of an organism are controlled by
RNA molecules
nucleotides
DNA molecules
enzymes
The main use of salt in the diet is to
produce in small amounts the hydrochloric acid required for the digestion of food
make the taste of food better
ease the process of cooking
increase the solubility of food particles in water
The inexpensive and commonly used variety of glass is called soda glass. It is called so because
was used initially for making bottles of soda(carbonated drink)
is made using soda(sodium carbonate)
was initially used for storing sodium carbonate
is made using soda lime
The first metal used by man was
iron
copper
gold
bronze
The gas used for artificial ripening of green fruit is
ethylene
ethane
carbon dioxide
acetylene
The main active constituent of tea and coffee is
nicotine
chlorophyll
caffeine
aspirin
The hardest form of carbon is
coke
graphite
diamond
charcoal
Which one of the following is not a chemical change ?
Burning of coal in air
Fermentation of sugarcane juice
Cracking of petroleum
Crystallization of table salt from sea water
Commercially, sodium bicarbonate is known as
washing soda
baking soda
bleaching powder
soda ash
The gas that is responsible for global warming is
carbon dioxide
oxygen
methane
sulfur
Glass is made of the mixture of
Quartz and mica
Sand and salt
Sand and silicates
None of these
Which one of the following glasses is used in bullet proof screens?
Soda glass
Pyrex glasss
Jena glass
Reinforced glass
