WB JEE 2023 | Some s Block Elements Question 1 | Chemistry

WB JEE 2023

MCQ (Single Correct Answer)

-0.25

Na$$_2$$CO$$_3$$ is prepared by Solvay process but K$$_2$$CO$$_3$$ cannot be prepared by the same because

K$$_2$$CO$$_3$$ is highly soluble in H$$_2$$O

KHCO$$_3$$ is sparingly soluble

KHCO$$_3$$ is appreciably soluble

KHCO$$_3$$ decomposes

WB JEE 2022

MCQ (Single Correct Answer)

-0.25

A sample of MgCO₃ is dissolved in dil. HCl and the solution is neutralized with ammonia and buffered with NH₄Cl / NH₄OH. Disodium hydrogen phosphate reagent is added to the resulting solution. A white precipitate is formed. What is the formula of the precipitate?

Mg₃(PO₄)₂

Mg(NH₄)PO₄

MgHPO₄

Mg₂P₂O₇

WB JEE 2022

MCQ (Single Correct Answer)

-0.25

To a solution of colourless sodium salt, a solution of lead nitrate was added to have a white precipitate which dissolves in warm water and reprecipitates on cooling. Which of the following acid radical is present in the salt?

Cl^$$-$$

SO$$_4^{2 - }$$

S^2$$-$$

NO$$_3^{ - }$$

WB JEE 2021

MCQ (Single Correct Answer)

-0.25

Indicate the products (X) and (Y) in the following reactions

Na₂S + nS(n = 1 $$-$$ 8) $$\to$$ (X)

Na₂SO₃ + S $$\to$$ (Y)

(X)	(Y)
$$N{a_2}{S_2}{O_3}$$	$$N{a_2}{S_2}$$

(X)	(Y)
$$N{a_2}{S_{(n + 1)}}$$	$$N{a_2}{S_2}{O_3}$$

(X)	(Y)
$$N{a_2}{S_n}$$	$$N{a_2}{S_2}{O_3}$$

(X)	(Y)
$$N{a_2}{S_5}$$	$$N{a_2}{S_2}{O_4}$$

WB JEE Subjects

Chemistry

Physical Chemistry

Some Basic Concepts of Chemistry Atomic Structure Redox Reaction Gaseous State Chemical Equilibrium Liquid Solution Ionic Equilibrium Thermodynamics Chemical Kinetics Radioactivity and Nuclear Chemistry Electrochemistry Solid State Surface Chemistry

Inorganic Chemistry

Periodic Table Chemical Bonding Metallurgy Hydrogen and It's Compounds Some s Block Elements Some P Block Elements d and f Block Elements Coordination Compounds

Organic Chemistry

IUPAC Nomenclatures General Organic Chemistry Isomerism Hydrocarbons Halogen Derivatives Alcohol and Ether Aldehyde and Ketone Aromatic Chemistry Carbonyl Compounds Carboxylic Acids and Amines Polymers Biomolecules Practical Chemistry Chemistry In Everyday Life

Mathematics

Algebra

Logarithms Sequence and Series Quadratic Equations Complex Numbers Permutations and Combinations Mathematical Induction and Binomial Theorem Matrices and Determinants Vector Algebra Three Dimensional Geometry Probability Statistics Sets and Relations

Trigonometry

Properties of Triangle Inverse Trigonometric Functions Trigonometric Functions & Equations

Coordinate Geometry

Straight Lines and Pair of Straight Lines Circle Parabola Ellipse and Hyperbola

Calculus

Functions Limits, Continuity and Differentiability Differentiation Application of Derivatives Indefinite Integrals Definite Integration Application of Integration Differential Equations