Question

Question paper of class 11 (chemistry) previous year 2017-18​

Answer 1

Question 1:

What is the SI unit of molality?

Question 2:

What is the lowest value of n that allows g orbital to exist?

Question 3:

Write the lewis dot structure of CO3‒2 ion.

Question 4:

What is smog?

Question 5:

Write the electronic configuration of p-block elements?

Question 6:

Ho w many electrons and neutrons are present on each of the following?

(i) 137Ba562+

(ii) 226Ra88

Question 7:

Consider the following species:

N3+, O2‒, F‒, Na+, Mg2+, Al3+

(i) What is common in them?

(ii) Arrange in the order of increasing ionic radii.

Question 8:

Differentiate between emission and absorption spectrum.

OR

Calculate the energy of one mole of photons of radiation whose frequency is 5 × 1014.

Question 9:

Draw the resonating structures of

(i) Ozone molecule

(ii) Nitrate ion

Question 10:

Write the limitations of octet theory.