The following solutions were prepared by dissolving 10 g of glucose ($C_6H_{12}O_6$) in 250 ml of water ($P_1$), 10 g of urea ($CH_4N_2O$) in 250 ml of water ($P_2$) and 10 g of sucrose ($C_{12}H_{22}O_{11}$) in 250 ml of water ($P_3$). The right option for the decreasing order of osmotic pressure of these solutions is :

The pollution due to oxides of sulphur gets enhanced due to the presence of: (a) particulate matter (b) ozone (c) hydrocarbons (d) hydrogen peroxide. Choose the most appropriate answer from the options given below:

Compound X on reaction with $O_3$ followed by $Zn/H_2O$ gives formaldehyde and 2-methylpropanal as products. The compound X is

Given below are two statements: Statement I: In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. $HCl + ZnCl_2$, known as Lucas Reagent. Statement II: Primary alcohols are most reactive and immediately produce turbidity at room temperature on reaction with Lucas Reagent. In the light of the above statements, choose the most appropriate answer from the options given below:

A dehydration reaction links two glucose molecules to product maltose. If the formula for glucose is $C_6H_{12}O_6$ then what is the formula for maltose?

Which of the following $P-V$ curve represents maximum work done?

The correct sequence of bond enthalpy of 'C—X' bond is :

Match List -I with List -II. List -I (Drug class): (a) Antacids, (b) Antihistamines, (c) Analgesics, (d) Antimicrobials. List -II (Drug molecule): (i) Salvarsan, (ii) Morphine, (iii) Cimetidine, (iv) Seldane. Choose the correct answer from the options given below:

Identify the final product [D] obtained in the following sequence of reactions. $CH_3CHO \xrightarrow[ii) H_3O^+]{i) LiAlH_4} [A] \xrightarrow{H_2SO_4, \Delta} [B] \xrightarrow{HBr} [C] \xrightarrow{Na/dry ether} [D]$