List of top Chemistry Questions

The incorrect statement from the following is

The correct order of electronegativity of group 13 elements is

Identify the correct statements from the following:
A) Among alkali metal ions, Li⁺ has the highest hydration enthalpy.
B) Boiling point of alkali metals increases from Li to Cs.
C) Density of K is less than that of Na and Rb.
D) Li has strong tendency to form superoxide.

Which of the following property is less for D₂O than H₂O?

Identify the correct statements from the following:
I) CO reduces the oxygen carrying ability of blood.
II) Producer gas contains CO and N₂.
III) C-O bond length in CO₂ is 115 pm.

Identify the most stable carbocation from the following

IUPAC names of the given compounds (I) and (II) are respectively

The mass of a mixture containing NaCl and NaBr is 4.0 g. If Na is 20% of the total mixture, the composition of NaCl in the mixture is

A and B are ideal gases. At T(K), 2 L of A with a pressure of 1 bar is mixed with 4 L of B with a pressure of P\(_B\) bar in a 100 L flask. The pressure exerted by gaseous mixture is 0.1 bar. What is the value of P\(_B\) in bar?

The number of extensive and intensive properties in the list given below is respectively: % List - Density, enthalpy, mass, temperature, volume, pressure

One mole of ethanol (C₂H₅OH) was completely burnt in oxygen to form CO₂(g) and H₂O(l). What is the \(\Delta H_f^{\circ}\) (in kJ/mol) for this reaction?

The molar solubility of PbI₂ in 0.2 M Pb(NO₃)₂ solution in terms of \(K_{sp}\) (solubility product) is

For the following given equilibrium reaction, K\(_p\) is equal to 1076 at T(K). What is the value of T (in K)? \[ \text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g) \] Given that \( R = 0.082 \, \text{L atm K}^{-1} \text{mol}^{-1} \), \( K_p = 1076 \), the equation is: \[ K_p = 1076, \, R = 0.082 \, \text{L atm K}^{-1} \text{mol}^{-1} \]

The correct equation for one mole of a real gas is (a, b are constants)

a, b, c, d are electromagnetic radiations. Frequencies of a, b, c are $3 \times 10^{15$ Hz, respectively, whereas the wavelength of c, d are 400 nm, 750 nm, respectively. The increasing order of their energies is}

Which of the following sets are correctly matched?

Molecule	Number of lone pairs of electrons on central atom	Hybridization
I) \( \text{PCF}_3 \)	1	\( \text{sp}^3 \)
II) \( \text{SO}_2 \)	2	\( \text{sp}^2 \)
III) \( \text{SF}_4 \)	2	\( \text{sp}^3d^2 \)
IV) \( \text{CF}_4 \)	2	\( \text{sp}^3 \)

The number of electrons with magnetic quantum number $m = 0$ in the elements with atomic numbers $Z = 24$ and $Z = 29$ are respectively

Which of the following orders is not correct for the given property?

Match the following

List-I (Molecule)	List-II (Dipole moment in D)
A) \( \text{HCCl} \)	I) \( 1.85 \, \text{D} \)
B) \( \text{NH}_3 \)	II) \( 1.07 \, \text{D} \)
C) \( \text{H}_2\text{O} \)	III) \( 0.23 \, \text{D} \)
D) \( \text{NF}_3 \)	IV) \( 1.47 \, \text{D} \)

The sequence of reagents required to convert aniline to benzoic acid is:

Match the following polymers with their applications:

Match the following:

List-I (Hormones)	List-II (Functions)
A) Glucocorticoids	I) Control the carbohydrate metabolism
B) Mineralocorticoids	III) Control the level of excretion of water and salt by the kidneys
C) Progesterone	II) Prepares the uterus for implantation of fertilised egg
D) Estradiol	IV) In the control of menstrual cycle

Match the following pollutant concentration limits in water with their effects:

List-I (Pollutant Concentration Limit in Water)	List-II (Effect)
Pollutant 1	Effect 1
Pollutant 2	Effect 2
Pollutant 3	Effect 3
Pollutant 4	Effect 4

Match the following polymers with their applications:

List-I (Polymer)	List-II (Used in making)
Polymer 1	Application 1
Polymer 2	Application 2
Polymer 3	Application 3
Polymer 4	Application 4

IUPAC names of mesityl oxide and oxalic acid are respectively:

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