HSC Science (Electronics) ११ वीं कक्षा - Maharashtra State Board Question Bank Solutions

Would it be easier to drink water with a straw on the top of Mount Everest or at the base? Explain.

State and write the mathematical expression for Dalton’s law of partial pressure and explain it with a suitable example.

Solve the following.

Nitrogen gas is filled in a container of volume 2.32 L at 32°C and 4.7 atm pressure. Calculate the number of moles of the gas.

Solve the following.

At 25°C and 760 mm of Hg pressure, a gas occupies 600 mL volume. What will be its pressure at the height where the temperature is 10°C and the volume of the gas 640 mL?

Solve the following.

A neon-dioxygen mixture contains 70.6 g dioxygen and 167.5g neon. If the pressure of the mixture of the gases in the cylinder is 25 bar. What is the partial pressure of dioxygen and neon in the mixture?

Solve the following.

Calculate the pressure in atm of 1.0 mole of helium in a 2.0 dm³ container at 20.0°C.

Solve the following.

Calculate the volume of 1 mole of a gas at exactly 20°C at a pressure of 101.35 kPa.

Solve the following.

Calculate the number of molecules of methane in 0.50 m³ of the gas at a pressure of 2.0 × 10² kPa and a temperature of exactly 300 K.

Choose the correct option.

Which of the following has maximum number of molecules?

The number of molecules in 22.4 cm³ of nitrogen gas at STP is ______.

Which of the following has the largest number of atoms?

Calculate the molecular mass of the following in u.

NH₃

Calculate the molecular mass of the following in u.

CH₃COOH

Calculate the molecular mass of the following in u.

C₂H₅OH

What is the ratio of molecules in 1 mole of NH₃ and 1 mole of HNO₃?

Solve problem:

The mass of an atom of hydrogen is 1.008 u. What is the mass of 18 atoms of hydrogen?

Solve problem:

Calculate the number of an atom of the following (Given: Atomic mass of I = 127 u).

254 u of iodine (I)

Solve problem:

Calculate the number of an atom of the following (Given: Atomic mass of I = 127 u).

254 g of iodine (I)

Solve problem:

Arjun purchased 250 g of glucose (C₆H₁₂O₆) for Rs 40. Find the cost of glucose per mole.

Solve the problem:

The natural isotopic abundance of ¹⁰B is 19.60% and ¹¹B is 80.40 %. The exact isotopic masses are 10.13 and 11.009 respectively. Calculate the average atomic mass of boron.