What is the pressure of 380 mm Hg column of a gas in pascal ?
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
NEET Practice Questions (MCQs) with Answers & Solutions
Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Helium gas is compressed to half of the volume at 303 K. It should be heated to which temperature for its volume to increase to double of its original volume ?
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
When a gas is heated from 298K to 323K at a constant pressure of 1 atm its volume is
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
Explanation
Hint 1 $ 380mm = 380 torr = { 380 \over 760 } atm $ $ \therefore 0.987 atm = 10 ^ 5 Pa $ $ \therefore { 380 \over 760 } atm = (?) \therefore 380 mm = 5.05 \times 10 ^ 4 Pa $ Hint 2 At const pressure according to charles law $ { V_1 \over T_1 } = { V_2 \over T_2 } = K $ $ \therefore { 22.4 \over 273} = 0.082 ......(1) and { 30.6 \over 373 } = 0.082 ---(2) $ Hint 3 According to Charles’ law $ { V_1 \over T_1 } = { V_2 \over T_2 } = K $ $ V_1 = { V_1 \over 2 } at T_1 = 303 K $ $ \therefore T_2 = { V_2 T_1 \over V_1 } $ $ V_2 = 2 V_1 at T_2 = ? $ $ = { 2 V_1 \times 303 \over {V_1 \over2 } } = 303 \times 4 = 1212 K $ Hint 4 According to Charles’ law $ { V_1 \over T_1 } = { V_2 \over T_2 } $ $ { V_1 \over 298 } = { V_2 \over 323} $ $ \therefore V_2 = { 323 \over 298 } V_1 = 1.08 V_1 $
At $ 20 ^\circ and 760 torr, the sample of air contains 20 \% O_2 \& 80 \% N_2 gaseous mixture, find the density of the air (Molarmass O_2 = 32 g/mol , N_2 = 28 g/mole R =0.082 liter mole ^ {-1} K ^ {-1}) $
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
The ratio of velocities of diffusion of gas A and B is 1 : 4, if the ratio of their masses in a mixtare is 2:3, calculate the ratio of their mole fractions (BIT 1990)
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
Under same conditions of temperature and pressure the volumes of $ 14g N_2 and 36g of O_3 $ are related as :
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
Equal masses of Hydrogen and oxygen gases are placed in a closed container, at a pressure of 3.4 atm. The contribution of hydrogen gas to the total pressure is
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
The kinetic energy of 4.0 moles of $ N_2 gas at 127 ^\circ C is (R =2 cal mole ^ {-1} K^{-1}) $
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
The critical temperature of $ H_2O is higher than CO_2 $ because (IIT 1997)
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
Explanation
Critical temperature is directly proportional to dipole moment
The compressibility factor of an ideal gas is
You've reached today's free limit of 20 questions.
Log in to keep practising for free.
Ready to ace NEET?
Free access · No credit card required
Frequently Asked Questions
Yes. You can attempt every NEET question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.