Isotopes are used in the laboratory to investigate the steps of chemical reactions and medical mysteries. An isotope which is used in the treatment of Goitre is
A) Iodine isotope
B) Carbon isotope
C) Cobalt isotope
D) Uranium isotope
1 Answers
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i. A majority of reactions in the laboratory are carried out in in gaseous forms.
i. False A majority of reactions in the laboratory are carried out in solution forms. ii. True iii. False Molality of a solution does not change with temperature.
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In a chemical laboratory, Priyal was asked to isolate an organic compound from its aqueous solution. She added ethyl acetate to the given sample,
i. Method used : Solvent extraction method. Principle : Extraction of compound takes place based on the difference in solubility of compound in two liquids, In this process, the solute distributes itself between two...
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Without warrant the police officer shall investigate the ……….. case.
B) Immoral trafficking
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Describe the steps involved in balancing redox reactions by the oxidation number method.
i. Step 1 : Write the unbalanced equation for redox reaction. Balance the equation for all atoms in the reactions, except H and O. Identify the atoms which undergo change in...
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The isotopes of Uranium is used as fuel in …………. reactors.
Correct option is D) Nuclear
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Isotopes are not used in this system. A) Solving chemical and medical mysteries
D) To pass electricity
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Describe the steps involved in balancing redox reactions by ion electron method (Half reaction method).
In this method two half equations are balanced separately and then added together to give balanced equation. Following steps are involved. Step 1: Write unbalanced equation for the redox reaction, assign...
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Chemical reactions which occur in presence of sunlight are called ………………. reactions. A) Thermal
C) Photo chemical
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Boron has two isotopes, B-10 and B-11. The average atomic mass of boron is found to be 10.80u. Calculate the percentage of abundance of these isotopes
Correct Answer - B-10 = 20%, B-11 =80%
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Assertion (A) : All isotopes of a given element show the same type of chemical behaviour.
(i) Both A and R are true and R is the correct explanation of A.
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