Related Questions

The most abundant element in the earth 's crust is oxygen . The second most abundant element is the earth's crust is -
A Hydrogen
B Silicon
C Nitrogen
D Brass
The most abundant inert gas in the atmosphere is
A Helium
B Neon
C Argon
D Krypton
The most abundant element in the earth's atmosphere is
A Argon
B Nitrogen
C Oxygen
D Krypton
The most abundant element in the earth’s atmosphere is
A Argon
B Nitrogen
C Oxygen
D Krypton
Which one is the most abundant gas in the air?
A Oxygen
B Nitrogen
C Carbon dioxide
D Methane
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
An atom of a rare gas is placed is an electric field E. Then
A The nucleus will be shifted in the direction of E by an amount which is proportional to E.
B The nucleus will not be shifted.
C The nucleus will be shifted in the direction of E by an amount which is independent of E.
D The nucleus will be shifted in a direction opposite to that of E.
Which is abundant in Gobar gas?
A Carbon dioxide
B Methane
C Oxygen
D Hydrogen
A drug that is highly effective in treating many types of infection can,at present,be obtained only from the bark of the ibora , a tree that is quite rare in the wild. It takes the bark of 5000 trees to make one kilogram of the drug. It follows, therefore, that continued production of the drug must inevitably lead to the ibore's extinction. Which of the following,if true, most seriously weakens the arguments above ?
A The drug made from the ibora bark is dispensed to doctors from a central authority
B The drug made from the ibora bark is expensive to produce
C The leaves of the ibora are used in a number of medical products
D The ibora can be propagated from cuttings and grown under cultivation

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