NCERT Class 11 Chemistry Unit 1 Some basic concepts of
Chemistry 43 Questions with Verified Answers
Drugs used for cancer treatment - CORRECT ANSWER 1) cisplatin
2) taxol
Drugs used for AIDS victims - CORRECT ANSWER AZT
Azidothymidine
A chemical substance responsible for ozone depletion in stratosphere - CORRECT
ANSWER Chlorofluorocarbons
Define matter - CORRECT ANSWER anything that occupies space and has mass
What are the methods by which components of a mixture can be seperated? -
CORRECT ANSWER 1) hand picking
2) filtration
3) crystallization
4) distillation
What is the CGPM ? - CORRECT ANSWER Conferance Generale des Poids
general conference on weights and measures
Who formed the CGPM and when ? - CORRECT ANSWER It is an intergovermental
treaty organization created by a diplomatic treaty known as Metre Convention
which was signed in Paris in 1875.
Define mass - CORRECT ANSWER Mass is the amount of matter in an object.
Define weight - CORRECT ANSWER A measure of the force of gravity on an object
Laboratory devices used to measure volume of liquid - CORRECT ANSWER 1)
graduated cylinder
2) burette
, 3) pipette
4) volumetric flask
Density - CORRECT ANSWER Mass per unit volume
kgm^-3
relation between F and C - CORRECT ANSWER F = 9/5 C + 32
what is the mass standard of kilogram defines as ? - CORRECT ANSWER The mass
of platinum - iridium cylinder stored in an airtight jar at International bureau of
weights and measures .
Precision - CORRECT ANSWER a measure of how close a series of measurements
are to one another
Accuracy - CORRECT ANSWER A description of how close a measurement is to the
true value of the quantity measured.
Law of conservation of mass - CORRECT ANSWER Mass can neither be created nor
destroyed
2) Law of constant /definite proportion - CORRECT ANSWER A given chemical
compound always contains the same element combined in a fixed ratio
1) Law of multiple proportion - CORRECT ANSWER · If two elements combine to
give more than one product, the masses that combine in a fixed mass of another
will be in a simple whole number ratio.
1) Law of reciprocal proportion - CORRECT ANSWER In compound AB , if the ratio
of A to B is x : y and in compound AC, if the ratio of A to C is
x is to z then in compound BC , the ratio of B to C will be y is to z.
Gay Lussac's law of gaseous volume - CORRECT ANSWER In a gaseous reaction,
volume of reactants and products
(at the same temperature and pressure) will bear a simple whole number ratio.
Chemistry 43 Questions with Verified Answers
Drugs used for cancer treatment - CORRECT ANSWER 1) cisplatin
2) taxol
Drugs used for AIDS victims - CORRECT ANSWER AZT
Azidothymidine
A chemical substance responsible for ozone depletion in stratosphere - CORRECT
ANSWER Chlorofluorocarbons
Define matter - CORRECT ANSWER anything that occupies space and has mass
What are the methods by which components of a mixture can be seperated? -
CORRECT ANSWER 1) hand picking
2) filtration
3) crystallization
4) distillation
What is the CGPM ? - CORRECT ANSWER Conferance Generale des Poids
general conference on weights and measures
Who formed the CGPM and when ? - CORRECT ANSWER It is an intergovermental
treaty organization created by a diplomatic treaty known as Metre Convention
which was signed in Paris in 1875.
Define mass - CORRECT ANSWER Mass is the amount of matter in an object.
Define weight - CORRECT ANSWER A measure of the force of gravity on an object
Laboratory devices used to measure volume of liquid - CORRECT ANSWER 1)
graduated cylinder
2) burette
, 3) pipette
4) volumetric flask
Density - CORRECT ANSWER Mass per unit volume
kgm^-3
relation between F and C - CORRECT ANSWER F = 9/5 C + 32
what is the mass standard of kilogram defines as ? - CORRECT ANSWER The mass
of platinum - iridium cylinder stored in an airtight jar at International bureau of
weights and measures .
Precision - CORRECT ANSWER a measure of how close a series of measurements
are to one another
Accuracy - CORRECT ANSWER A description of how close a measurement is to the
true value of the quantity measured.
Law of conservation of mass - CORRECT ANSWER Mass can neither be created nor
destroyed
2) Law of constant /definite proportion - CORRECT ANSWER A given chemical
compound always contains the same element combined in a fixed ratio
1) Law of multiple proportion - CORRECT ANSWER · If two elements combine to
give more than one product, the masses that combine in a fixed mass of another
will be in a simple whole number ratio.
1) Law of reciprocal proportion - CORRECT ANSWER In compound AB , if the ratio
of A to B is x : y and in compound AC, if the ratio of A to C is
x is to z then in compound BC , the ratio of B to C will be y is to z.
Gay Lussac's law of gaseous volume - CORRECT ANSWER In a gaseous reaction,
volume of reactants and products
(at the same temperature and pressure) will bear a simple whole number ratio.
