Improvement in Food Resources MCQS and Answers with FREE PDF

Download as PDF 1. Preventive and control measures adopted for the storage of grains include (a) strict cleaning (b) proper disjoining (c) fumigation (d) all of the above 2. To solve the food problem of the country, which among the following is necessary? (a) Increased production and storage of food grains (b) Easy access of … Read more

Mole Concept | Some Basic Concepts of Chemistry MCQs and Answers with FREE PDF

Download as PDF 1. Mass of one atom of the element A is 3.985410-23. How many atoms are contained in 1 gm of the element A? (a)    2.509 1023 (b)    6.022 1023 (c)    12.044 1023 (d)     None of these 2. Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The molality of the … Read more

Atoms and Molecules class 9 MCQs and Answers with FREE PDF

Download as PDF 1. The present concept of the structure of an atom is given by which scientist? a) Rutherford b) Goldstein c) Niels Bohr d) J.J. Thomson 2. Which model does not able to explain the stability of an atom? a) Bohr’s Model b) Rutherford’s Model c) Thomson’s Model d) None of the above … Read more