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A vessel contains 1.6 g of dioxygen at STP (273.15K, 1 atm pressure). or own an. Which of the following reactions is not correct according to the law of conservation of mass. Some Basic Concepts of Chemistry. -�W�`PYW���o����|��LīI�u¡��{a��z��4LӨי�y����eZ���8�����F�5�b���f#��?qXX{7��&��q3�OU�ܗ3�:��,G�@ }o�\���C�h�����4x`?�B�� +:v��� �ͧ$0�y!z����)q,�`��z��]����Ș�E�C�g7�pXvR�dZ���A�L;D��-������V/�@@�B�'����h�����,�2��j���/dz�0������S2��e�M�f�cq`䍾��/���N�֭U�ޠ��ǎP�T����I8�!I�v}�_3%_s�e����F��������q B�l������+h�MO@G���3�������pU�}�-����)4�w���>M�6��R�c���a�V�T�O�ֺ�)b����qw�̫���Z'�5\BP��Usd#��.`�W>�wW�-����n��j��w���s�J�+�9&T����jfu�9����� �$�&�|vC�,�Whe, پ^�z��s���L�x܌��+�cf۟ ���Ǔ1Zqs��L����0�E��tqh$����s�!�X>RHK䥇&CN�̔��������>o7��N~�]��;��w���}];j)� Unit 1 Some Basic Concepts of Chemistry General introduction, Importance and scope of chemistry, Historical approach to particulate nature of matter, Laws of chemical combination, Dalton’s atomic theory, Atomic and molecular masses, Mole concept and molar mass, Stoichiometry and calculations based on … We can get the answers of many such questions with the help of basic concepts of chemistry (Chapter 1 of Class 11). 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(ii) 0.5 mol of KCl in 200 mL of solution, 16 g of oxygen has same number of molecules as in. ���&���y/����#ǝ.S3�K�v�`�y����Dx>ke���:�B�����y�z;+bU��{YiY .WYK�E�T���jZп�a��۔\��3%�p������7���i����d�s���xՍ�x���:�r)5wr�m -c }�C�o-����K�b2��@z�d�o���z��aw7������^����o��y3��x��4{�������L*�&Ԑ����`��!�cw �#�Y ���%Ƒ��;G�~ combinations of atoms: their composition, structure, properties, behaviour and the changes they undergo during a reaction with other compounds.. Chemistry Basic Concept MCQs. Give reason for your answer. Those students who want to get good marks in the papers, try to solve all the MCQs, short question answer, fill in the blanks, Multiple choice, and get the results instantly. Become our. Another box contains identical blue coloured balls, labelled as B, each weighing 5 grams. (iv) Amount of Fe 2 O 3 produced will decrease if the amount of any one of the reactants (iron or oxygen) is taken in excess. 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