Please refer to Assignments Class 11 Chemistry Some Basic Concepts of Chemistry Chapter 1 with solved questions and answers. We have provided Class 11 Chemistry Assignments for all chapters on our website. These problems and solutions for Chapter 1 Some Basic Concepts of Chemistry Class 11 Chemistry have been prepared as per the latest syllabus and books issued for the current academic year. Learn these solved important questions to get more marks in your class tests and examinations.
Some Basic Concepts of Chemistry Assignments Class 11 Chemistry
Question. Which of the following contains same number of carbon atoms as are in 6.0 g of carbon (C – 12) ?
(a) 6.0 g Ethane
(b) 8.0 g Methane
(c) 21.0 g Propane
(d) 28.0 g CO
Answer
B
Question. The prefix zepto stands for
(a) 109
(b) 10-12
(c) 10-15
(d) 10-21
Answer
D
Question. The density of a gas is 1.78 gL-1 at STP. The weight of one mole of gas is
(a) 39.9 g
(b) 22.4 g
(c) 3.56 g
(d) 29 g
Answer
A
Question. Molarity of 0.2 N H2SO4 is
(a) 0.2
(b) 0.4
(c) 0.6
(d) 0.1
Answer
D
Question. An atom is 10 times heavier than 1/12th of mass of a carbon atom (C – 12). The mass of the atom in a.m.u. is
(a) 10
(b) 120
(c) 1.2
(d) 12
Answer
A
Question. A chemical formula based on actual number of molecule is called ____ formula:
(a) Structural
(b) Molecular
(c) Empirical
(d) None
Answer
B
Question. Any charged particle is called:
(a) Atom
(b) Molecule
(c) Ion
(d) Mixture
Answer
C
Question. The total number of atoms represented by the compound CuSO4. 5H2O is
(a) 27
(b) 21
(c) 5
(d) 8
Answer
B
Question. Haemoglobin contains 0.33% of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (At. wt. of Fe = 56) present in one molecule of haemoglobin is
(a) 6
(b) 1
(c) 4
(d) 2
Answer
C
Question. The balancing of equations is based upon which of the following law?
(a) Law of Multiple Proportions
(b) Law of Conservation of Mass
(c) Boyles Law
(d) Law of Reciprocal Proportions
Answer
B
