Browse and search thousands of solved questions for your preparation.
Free questions with full explanations — locked behind signup to protect quality.
Identify the incorrect statement.
Anisole on cleavage with HI gives
The incorrect statement among the following is :
Which of the following reactions is the metal displacement reaction? Choose the right option.
Statement I : Acid strength increases in the order given as $HF << HCl << HBr << HI$. Statement II : As the size of the elements F, Cl, Br, I increases down the group, the bond strength of HF, HCl, HBr and HI decreases and so the acid strength increases. In the light of the above statements, choose the correct answer from the options given below.
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 :
Given below are two statements : Statement I : Aspirin and Paracetamol belong to the class of narcotic analgesics. Statement II : Morphine and Heroin are non-narcotic analgesics. In the light of the above statements, choose the correct answer from the options given below.
The correct structure of 2, 6-Dimethyl-dec-4-ene is
$CH_3CH_2COO^- Na^+ \xrightarrow[\text{Heat}]{\text{NaOH, ?}} CH_3CH_3 + Na_2CO_3$. Consider the above reaction and identify the missing reagent/chemical.
Choose the correct option for graphical representation of Boyle's law, which shows a graph of pressure vs. volume of a gas at different temperatures :
Match List-I with List-II. List-I: (a) 2SO_2(g) + O_2(g) -> 2SO_3(g) (b) HOCl(g) --hv--> OH + Cl (c) CaCO_3 + H_2SO_4 -> CaSO_4 + H_2O + CO_2 (d) NO_2(g) --hv--> NO(g) + O(g) List-II: (i) Acid rain (ii) Smog (iii) Ozone depletion (iv) Tropospheric pollution
Match List-I with List-II. List-I: (a) Benzene ring with CO, HCl, Anhyd. AlCl3/CuCl, (b) R-CO-CH3 + NaOX, (c) R-CH2-OH + R'COOH, Conc. H2SO4, (d) R-CH2COOH, (i) X2/Red P, (ii) H2O. List-II: (i) Hell-Volhard-Zelinsky reaction, (ii) Gattermann-Koch reaction, (iii) Haloform reaction, (iv) Esterification.
The product formed in the following chemical reaction is: [Diagram showing a cyclohexanone derivative with a ketone and ester group reacting with NaBH4 in C2H5OH]
For a reaction $A \rightarrow B$, enthalpy of reaction is $-4.2 \text{ kJ mol}^{-1}$ and enthalpy of activation is $9.6 \text{ kJ mol}^{-1}$. The correct potential energy profile for the reaction is shown in option.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): $ICl$ is more reactive than $I_2$. Reason (R): $I-Cl$ bond is weaker than $I-I$ bond. In the light of the above statements, choose the most appropriate answer from the options given below:
Identify the correct statement from the following :
The central dogma of molecular genetics states that the genetic information flows from:
Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.
The non-essential amino acid among the following is:
A metal ion present in vitamin $B_{12}$ is: