Hi guys,This Dr. Nileshkumar Vala from My Smart Class and in this video I am going to teach you all about Chemistry Class 11 Unit 1 Some Basic Concept of Chemistry, Missing Question's Solution.
chemistry class 11 chapter 1 exercise questions and answers
Hope you like it :) Thanks For Watching :)
Time Stamp of Numerical is given below in the description.
00:36 Question 1.14: What is the SI unit of mass? How is it defined?
01:04 Question 1.15: Match the following prefixes with their multiples:
01:24 Question 1.16: What do you mean by significant figures?
02:52 Question 1.19:How many significant figures are present in the following?(i) 0.0025(ii) 208(iii) 5005(iv) 126,000(v) 500.0(vi) 2.0034
04:02 Question 1.20:Round up the following upto three significant figures:(i) 34.216(ii) 10.4107(iii) 0.04597(iv) 2808
05:54 Question 1.23: In a reactionA + B2 AB2Identify the limiting reagent, if any, in the following reaction mixtures.(i) 300 atoms of A + 200 molecules of B(ii) 2 mol A + 3 mol B(iii) 100 atoms of A + 100 molecules of B(iv) 5 mol A + 2.5 mol B(v) 2.5 mol A + 5 mol B
09:10 Question 1.24: Dinitrogen and dihydrogen react with each other to produce ammonia according to the following chemical equation:
N2(g) + H2(g) 2NH3(g)(i) Calculate the mass of ammonia produced if 2.00 × 103 g dinitrogen reacts with 1.00 ×103 g of dihydrogen.(ii) Will any of the two reactants remain unreacted?(iii) If yes, which one and what would be its mass?
13:59 Question 1.25: How are 0.50 mol Na2CO3 and 0.50 M Na2CO3 different?
15:07 Question 1.26:If 10 volumes of dihydrogen gas reacts with five volumes of dioxygen gas, howmany volumes of water vapour would be produced?
16:12 Question 1.27:Convert the following into basic units:(i) 28.7 pm(ii) 15.15 pm(iii) 25365 mg
18:26 Question 1.28:Which one of the following will have the largest number of atoms?(i) 1 g Au (s)(ii) 1 g Na (s)(iii) 1 g Li (s)(iv) 1 g of Cl2(g)
19:09 Question 1.30: What will be the mass of one 12C atom in g?
19:35 Question 1.31:How many significant figures should be present in the answer of the following calculations?
20:54 Question 1.33: Calculate the number of atoms in each of the following
(i) 52 moles of Ar
(ii) 52 u of He
(iii) 52 g of He.