List of top Chemistry Questions

Which of the following sets consists only of essential amino acids ?

Which of the following is not a characteristic of transition elements ?

Electrolysis of dilute aqueous $NaCl$ solution was carried out by passing $10\, mA$ current. The time required to liberate $0.01\, mole$ of $H_2$ gas at the cathode is $(1 \,F\,= 96500 \,C \,mol^{-1})$

The correct statement(s) about the compound given below is/are

The continuous phase contains the dispersed phase throughout, Example is

Milk changes after digestion into :

What is the equilibrium expression for the reaction, $ {{P}_{4}}(s)+5{{O}_{2}}(g) \rightleftharpoons {{P}_{4}}{{O}_{10}}(s)? $

The enthalpies of combustion of carbon and carbon monoxide are $ -393.5 $ and $ -283\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}} $ respectively. The enthalpy of formation of carbon monoxide per mol is

The volumes of two $ \text{HCl} $ solutions A(0.5 N) and B(0.1 N) to be mixed for preparing 2 L of 0.2 N HCl solution are

When 0.1 mole of an acid is added to 2 L of a buffer solution, the pH of the buffer decreases by 0.5. The buffer capacity of the solution is

AB is an ionic solid. If the ratio of ionic radii of $ {{\text{A}}^{\text{+}}} $ and $ {{\text{B}}^{-}} $ is 0.52, what is the coordination number of $ {{\text{B}}^{-}} $ ?

Which one of the following reactions occur at the cathode?

Which one of the following reactions is an example of auto-catalysis?

Unusual high boiling point of water is result of

The electronic configuration $1 s^{2},\, 2 s^{2} 2 p^{6},\, 3 s^{2} 3 p^{6} 3 d^{9}$ represents a

For the reaction : $ \ce{H_2 +I_2 -> 2HI} $ , the differential rate law is

Benzoylation of phenol in alkaline medium is known as

Addition of sodium acetate to $0.1 \,M$ acetic acid will cause

The $IUPAC$ name of $CH_{3}-CH=CH-C \equiv CH$ is

What volume of oxygen gas $(O_2)$ measured at $0^\circ C$ and 1 atm, is needed to bum completely 1L of propane gas $(C_3H_8)$ measured under the same conditions?

Green chemistry means such reactions which

$Cl - P - Cl$ bond angles in $PCl_5$ molecule are

The dissociation equilibrium of a gas $ AB_2 $ can be represented as $2 A B_2(g) \rightleftharpoons 2 A B (g) + B_2 (g) $ The degree of dissociation is $x$ and is small compared to $1$. The expression relating the degree of dissociation (x) with equilibrium constant $K_p$ and total pressure $p$ is

Which of the following are not state functions? (I) q + W (II) q (III) w (IV) H-TS

Standard free energies of formation (in kj/mol) at 298 K are -237.2, -394.4 and -8.2 for $H_2O(l),CO_2(g) $ and pentane (g), respectively. The value of $E^0_{cell} $ for the pentane-oxygen fuel cell is