The correct order of metallic character is :

Number of water molecules in washing soda and soda ash respectively are :

Lime reacts exothermally with water to give 'A' which has low solubility in water. Aqueous solution of 'A' is often used for the test of CO$${}_2$$, a test in which insoluble B is formed. If B is further reacted with CO$${}_2$$ then soluble compound is formed, 'A' is :

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Sodium is about 30 times as abundant as potassium in the oceans. Reason R : Potassium is bigger in size than sodium. In the light of the above statements, choose the correct answer from the options given below

For a good quality cement, the ratio of lime to the total of the oxides of $$\mathrm{Si},\mathrm{Al}$$ and $\mathrm{Fe}$ should be as close as to :

Given below are two statements: Statement I : Lithium and Magnesium do not form superoxide Statement II : The ionic radius of $${\mathrm{Li}}^{+}$$ is larger than ionic radius of $${\mathrm{Mg}}^{2+}$$ In the light of the above statements, choose the most appropriate answer from the options given below :

What is the purpose of adding gypsum to cement?

The product, which is not obtained during the electrolysis of brine solution is :

Ion having highest hydration enthalpy among the given alkaline earth metal ions is :

Structures of $${\mathrm{BeCl}}_2$$ in solid state, vapour phase and at very high temperature respectively are :

Resonance in carbonate ion $$\left({\mathrm{CO}}_3{}^{2-}\right)$$ is Which of the following is true?

Match items of column I and II .tg {border-collapse:collapse;border-spacing:0;width: 100%} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-1wig{font-weight:bold;text-align:left;vertical-align:top} .tg .tg-baqh{text-align:center;vertical-align:top} .tg .tg-amwm{font-weight:bold;text-align:center;vertical-align:top} .tg .tg-0lax{text-align:left;vertical-align:top} Column I (Mixture of compounds) Column II (Separation Technique) A. $${\mathrm{H}}_{2}O/C{\mathrm{H}}_2\mathrm{C}{\mathrm{l}}_2$$ i. Crystalization B. ii. Differential solvent extraction C. Kerosene / Naphthalene iii. Column chromatography D. $${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6/NaCl$$ iv. Fractional Distillation Correct match is

Match List I with List II: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-c3ow{border-color:inherit;text-align:center;vertical-align:top} .tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top} List I (Mixture) List II (Separation Technique) A. ${\mathrm{CHCl}}_3+{\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_2$ I. Steam distillation B. ${\mathrm{C}}_6{\mathrm{H}}_{14}+{\mathrm{C}}_5{\mathrm{H}}_{12}$ II. Differential extraction C. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_2+{\mathrm{H}}_2\mathrm{O}$ III. Distillation D. $\text{ Organic compound in }{\mathrm{H}}_2\mathrm{O}$ IV. Fractional distillation

Which of the following conformations will be the most stable?

The correct order in aqueous medium of basic strength in case of methyl substituted amines is :

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Benzene is more stable than hypothetical cyclohexatriene Reason R : The delocalised $$\pi$$ electron cloud is attracted more strongly by nuclei of carbon atoms. In the light of the above statements, choose the correct answer from the options given below:

Which will undergo deprotonation most readily in the basic medium?

Which of the following statement is correct for paper chromatography?

Given below are two statements : Statement I : Tropolone is an aromatic compound and has $$8\pi$$ electrons. Statement II : $$\pi$$ electrons of $$>\mathrm{C}=\mathrm{O}$$ group in tropolone is involved in aromaticity. In the light of the above statements, choose the correct answer from the options given below:

Among the following compounds, the one which shows highest dipole moment is