CBSE Class 11 Chemistry Sample Paper Set 13

Q.1 Arrange the following molecules in order of increasing ionic character LiF,K₂O N₂,SO₂

Q.2 What is Boyle temperature?

Q.3 Predict the position of the element in the periodic table having electronic configuration

(n-1) d²ns² for n = 4

Q.4 Arrange the following elements in order of increasing ionisation enthalpy:

B, C, N, O

Q.5 State two differences between sigma and pi bond.

Q.6 Write all the quantum numbers for the 19th electron of Scandium ( Z= 21)

Q.7 How many unpaired electrons are present in Cu ( Z= 29)

Q.8 Name any two green house gases.

Q.9 Calculate the number of Cl^- ions in 119g of CaCl₂?

Q.10 a) What do you understand by a limiting reagent?

b) Calculate total number of electrons in 1.7g of NH₃ ?

Q.11 a) How many electrons in a given atom can have the following quantum number n = 4,l=1

b) Write the electronic configuration of Fe²⁺ ( Z = 26 )

Q.12a) Define Law of constant composition.

b) What is the number of molecules present in 44mg of carbon di oxide?

Q.13Give reasons for the following:

a) Electron gain enthalpy of Cl is more negative than F

b) Size of anion is larger than that of the neutral atom

Q.14 Consider the following species:

N^3- ,O^2- , F^- , Na⁺ , Mg²⁺

a) What is common in them?

b) Arrange them in order of increasing size

Q.15 a) What is diagonal relationship explain with the help of an example.

b) How is lithium different from other alkali metals?

Q.16a) What are inner transition elements?

b) Write their general configuration and state any two characteristic properties of these elements.

Q.17 What is the cause and harmful effect of global warming?

Q.18a) What is the harmful effect of carbon monoxide in the air?

b) What is chemical smog?

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