Related Questions

The density of a gas 'X' is twice that of another gas 'Y'. If the molecular weight of gas 'Y' is 'M'; then the molecular weight of the gas 'X' will be
A 2M
B $$\frac{{\text{M}}}{2}$$
C M
D $$\frac{{\text{M}}}{4}$$
দুটি এক-পরমাণুক আদর্শ গ্যাস পরস্পরের সাথে তাপীয় সাম্যাবস্থায় আছে। A গ্যাস m ভরের অণু দ্বারা গঠিত, এবং B গ্যাস 4m ভরের অণু দ্বারা গঠিত। A গ্যাসের আয়তন ৪ গ্যাসের আয়তনের দ্বিগুণ। এদের চাপের অনুপাত PA / PB কত? (Two monoatomic ideal gases are in thermal equilibrium with each other. Gas A is composed of molecules with mass m while gas B is composed of molecules with mass 4m. The volume of gas A is twice that of gas B. What it the ratio of their pressures PA / PB ?)
A 1/4
B 1/2
C 1
D 2
In a certain code, INACTIVE is written as VITCANIE. How is COMPUTER written in the same code?
A PMOCRETU
B ETUPMOCR
C UTEPMOCR
D MOCPETUR
Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?
A CO
B SO2
C NOx
D CFC (chloro fluoro carbons)
Fill in the gaps : There is no such thing as chemically pure water ----nature.
A in
B of
C from
D none of these
There is no such things as chemically pure water--- nature.
A in
B of
C from
D none of these
The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as
A Element
B Compound
C Atom
D Molecule
Chemically, marble is known as
A Metamorphic rock
B Argillaceous rock
C Calcareous rock
D Siliceous rock
RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically
A Cyclo trimethylene trinitramine
B Trinitro resorcinol
C Cyclo tetramethylene tetranitramine
D Trinitro benzene
Calgon used in water treatment is chemically
A Sodium phosphate
B Sodium hexametaphosphate
C Calcium phosphate
D Tricresyl phosphate

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