The volume of a fixed mass of gas at 300K is 10L.What will be the volume of the gas,if the temperature is doubled without changing the pressure.

The relation showing the volume and temperature of fixed mass of gas at constant pressure is tabulated below.

i) Find out the values of a and b.

ii)State the gas law associated with this.

iii) Write down any one instance from daily life related with this law.

a) What happens to the size of a gas bubble rising from the bottom of a water body?why?

b)Which is the gas law associated with this?

The volume of a fixed mass of gas at 2 atm pressure is 20L.What will be its volume if the pressure is increased 4 times without changing the temperature.

The data of an experiment conducted on a fixed mass of gas at constant temperature are given

i)Complete the table and find out the speciality of PV.

ii)What is the relation between pressure and volume?

iii) Which gas law can be proved by this experiment?

What happens to the following when the temperature of a gas in a closed container is increased ?

a) Kinetic energy

b)Pressure

When a gas contained in a 2L cylinder is completely transferred to a 4L cylinder,the volume of the gas will be ...........

Select the statements suitable to gases from those given below.

a) Intermolecular distance is very low.

b)The volume of gas depends on the volume of the container in which it is occupied.

c)The energy of gaseous molecules is very high.

d)The attractive force between gaseous molecules is very high.

a) How many moles are there in 140g Nitrogen?.

b) How many atoms are there in 140g Nitrogen?

(Atomic mass : N- 14 )

N₂ + 3 H₂→ 2NH₃

The ratio of reactants and products in the above reaction is 1:3:2 .Complete the table related with this reaction.

NaOH + HCl → NaCl + H₂O

a) How many moles of NaOH is needed to completely react with 1 mole of HCl ?

b) How many grams of HCl is required to completely neutralise 160g NaOH ?

Analyse the following equation and answer the questions

2Na + Cl₂→ 2NaCl

a) What is the ratio of reactant molecules and product molecules?

b)How many moles of NaCl will be obtained on reaction of 10 moles of chlorine ?

c) Find the mass of sodium required to get so much amount of NaCl .

 i) (i)Find a,b and c

ii) How many grams of H₂O is required to get 5 x 6.022 x 10²³ molecules ?

Which of the following have the same number of moles ?

[4 GMM H₂ , 88 g CO₂ , 89.6 L O₂ , 4 g He]

Which one contains 2 x 6.022 x10²³ Molecules ?

(28 g N₂ , 2 g H₂ , 32 g O₂ , 44.8 L CO₂)

Which one is used as the basis of atomic mass now a days?

(H-1 , C-12 , C-14 , O – 16)

4 x 6.022 x 10 ²³ Chlorine molecules at STP are taken. Answer the following

questions(Atomic mass : Chlorine = 35.5)

a) What is its volume at STP ?

b) What is the mass of this compound?

c) H₂ + Cl₂ → 2HCl

How many molecules of hydrogen are required to completely react with 4 x6.022x10²³ molecules of chlorine ?

Volume of 2 x 6.022x10²³ molecules of a gas at STP is _____

Mass of ¼ x 6.022x10²³ Oxygen molecule is _____________ .

(Hint : Oxygen- Molecular mass = 32)

Complete the table.

(Hint : MM : CO₂ = 18 , CH₄ = 16 , NH₃ = 17 )

N₂ + 3 H₂ → 2 NH₃

Number of moles of hydrogen required to completely react with 2moles of nitrogen is _______

360 g glucose [C₆H₁₂O₆] is given.

a) How many molecules are there in the sample ?

b) What is the total number of atoms in the sample? (Hints: Molecular mass C₆H₁₂O₆ = 180)

Which of the samples given below contains 1mole Oxygen atoms ?

(Atomic mass O = 16 )

a. 16 g Oxygen .

b. 8g Oxygen.

c . 32 g Oxygen.

d . 22.4 L oxygen at STP

Which among the following samples have the same number of molecules.

a) 88 g CO₂ b) 54 g H₂O c) 4 g H₂ d) 17 g NH₃

(Atomic mass : C = 12 , O = 16 , H = 1 ,N =14 )

The equation showing the reaction of Zinc with hydrochloric acid is given.

Zn + 2HCl → ZnCl₂ + H₂

a) How many molecules of ZnCl₂ will formed on complete reaction of 65g Zn with

HCl?

b) What will be the volume of H₂ formed at STP when 6.5g Zn reacts with HCl.

(Hint:Atomic mass : Zn = 65 , Cl = 35.5 , H= 1 )

2Mg + O₂ → 2MgO

The equation showing the burning of Magnesium is given. suppose 120g of Mg is burned.

a) How many atoms are there in 120g Mg ?

b) How much will be the volume of oxygen at STP to burn this much Mg?

c ) What will be the mass of Magnesium Oxide formed ?

(Hint : Atomic mass : O = 16, Mg = 24 )

Match the following.