Read the following two statements:
Statement I: Potassium dichromate is used in volumetric analysis.
Statement II: \(K_2Cr_2O_7\) is more soluble in water than \(Na_2Cr_2O_7\)
Statement I: Potassium dichromate is used in volumetric analysis.
Statement II: \(K_2Cr_2O_7\) is more soluble in water than \(Na_2Cr_2O_7\)
Show Hint
\(K_2Cr_2O_7\) is preferred as a primary standard in volumetric analysis due to its stability and consistency in aqueous solutions, even though it has lower solubility compared to \(Na_2Cr_2O_7.\)
- Both statements I and II are correct.
- Both statements I and II are incorrect.
- Statement I is correct and II is incorrect
- Statement I is incorrect and II is correct.
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Stability in Aqueous Solution
- K2Cr2O7: Potassium dichromate is more stable in aqueous solution, making it suitable as a primary standard.
- Na2Cr2O7: Sodium dichromate is less stable in water and tends to undergo changes in concentration, making it less suitable as a primary standard.
Conclusion for Statement I: K2Cr2O7 is preferred as a primary standard. Statement I is true.
Step 2: Solubility Comparison
- K2Cr2O7: Less soluble in water compared to Na2Cr2O7.
- Na2Cr2O7: More soluble in water than K2Cr2O7.
Conclusion for Statement II: Statement II is false because K2Cr2O7 is less soluble than Na2Cr2O7.
Final Answer:
Statement I is true, but Statement II is false.
Top JEE Main Chemistry Questions
What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)- At equilibrium the concentrations of and in a sealed vessel at . What will be for the reaction
- Find out the major products from the following reactions
Cobalt chloride when dissolved in water forms pink colored complex $X$ which has octahedral geometry. This solution on treating with cone $HCl$ forms deep blue complex, $\underline{Y}$ which has a $\underline{Z}$ geometry $X, Y$ and $Z$, respectively, are
- The correct order of atomic radii is:
Top JEE Main Some basic concepts of chemistry Questions
- The correct order of atomic radii is:
- In the estimation of bromine, 0.5 g of an organic compound gave 0.40 g of silver bromide. The percentage of bromine in the given compound is _____% (nearest integer)
(Relative atomic masses of Ag and Br are 108 u and 80 u, respectively). - Water does not produce CO on reacting with:
- The technique used for purification of steam volatile water immiscible substance is:
- Match List I with List II
\(\begin{array}{|c|c|c|} \hline \text{LIST I (Technique)} & & \text{LIST II (Application)} \\ \hline \text{A. Distillation} & & \text{I. Separation of glycerol from spent-lye} \\ \text{B. Fractional distillation} & & \text{II. Aniline - Water mixture} \\ \text{C. Steam distillation} & & \text{III. Separation of crude oil fractions} \\ \text{D. Distillation under reduced pressure} & & \text{IV. Chloroform-Aniline} \\ \hline \end{array}\)
Choose the correct answer from the options given below:
Top JEE Main Questions
- Two masses $m$ and $\frac{m}{2}$ are connected at the two ends of a massless rigid rod of length $l$. The rod is suspended by a thin wire of torsional constant $k$ at the centre of mass of the rod-mass system(see figure). Because of torsional constant $k$, the restoring torque is $\tau =k\theta$ for angular displacement $\theta$. If the rod is rota ted by $\theta_0$ and released, the tension in it when it passes through its mean position will be:
What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)- The value of is
- The number of terms of an is even. The sum of the odd terms is and of the even terms is . The last term exceeds the first by . Then the number of terms in the series is ______.
A black body is at a temperature of 2880 K. The energy of radiation emitted by this body with wavelength between 499 nm and 500 nm is U1, between 999 nm and 1000 nm is U2 and between 1499 nm and 1500 nm is U3. The Wien's constant, b = 2.88×106 nm-K. Then,
Concepts Used:
Some Basic Concepts of Chemistry
Chemistry is a vast subject and for understanding its significance we can take help of following points:
- Chemistry plays an important role in understanding various subjects like physics, geology and biology.
- Chemistry is a core branch of science that explains us about the various compositional properties and interaction of matter. It also helps to understand various chemical reactions.
- Chemistry is important in order to understand the behaviour of fertilizers, alkenes, acids, salts, dyes, polymers, drugs, soaps and alloys in organic and inorganic chemistry.
- Chemistry plays an important role in various fields like healthcare, industrial, research, food, and farm activities.
Read More: Some Basic Concepts of Chemistry
Classification of Matter
There are two ways of classifying the matter:
(A) Physical Classification:
Matter can exist in three physical states:
- Solids - have definite volume and definite shape
- Liquids - have definite volume but not definite shape.
- Gases - have neither definite volume nor definite shape.
(B) Chemical Classification:
Based upon the composition, matter can be divided into two main types:
- Pure Substances are defined as a single substance (or matter) which cannot be separated by simple physical methods. Pure substances can be further classified as (i) Elements (ii) Compounds
- Mixtures are the combination of two or more elements or compounds which are not chemically combined together and may also be present in any proportion.