List of top Chemistry Questions

Which allotrope of carbon is thermodynamically most stable?
The value of the gas constant $R$ in $\text{J K}^{-1}\text{ mol}^{-1}$ is
For the reaction $\text{N}_2\text{(g)} + 3\text{H}_2\text{(g)} \rightleftharpoons 2\text{NH}_3\text{(g)}$, the relation between $K_p$ and $K_c$ is
For a spontaneous process at constant temperature and pressure, the change in Gibbs free energy ($\Delta G$) is
According to the kinetic theory of gases, the absolute temperature of a gas is directly proportional to
Which of the following is a conjugate acid-base pair?
The pH of a $0.01\text{ M NaOH}$ solution is
The elements with atomic numbers 9, 17, 35, 53 belong to the family of
The hybridization of carbon in methane ($\text{CH}_4$) is
Which of the following quantum numbers determines the shape of an orbital?
Which of the following molecules has a linear shape?
The signs of $\Delta H$ and $\Delta S$ for a reaction to be spontaneous at all temperatures respectively are
At 273 K the maximum work done when pressure on 10g of hydrogen is reduced from 10atm to 1 atm under isothermal reversible conditions is
Calculate the amount of $CO_2$ gas produced, when 32g of $CH_4$ is burned with sufficient amount of oxygen ( Given atomic weight of C=12, O=16 and H=1)
Which of the following pairs of gaseous contains the same number of molecules
The solubility of \(Mg_3(PO_4)_2\) is \(S\) mol L\(^{-1}\). The solubility product is given by the relation
When \(30\,\text{mL}\) of \(0.2\,\text{M}\) \(NH_4OH\) is added to \(30\,\text{mL}\) of \(2\,\text{M}\) \(NH_4Cl\) solution. If the pH of the buffer formed is \(8.2\), what is the pKb of \(NH_4OH\)?
Which one of the pairs will form a buffer solution?
The conjugate acid of \( \text{NH}_2^- \) is:
For which of the following process entropy change ($\Delta S$) is negative ?
I) Sublimation of dry ice
II) Freezing of water
III) Crystallisation of the dissolved substance
IV) Burning of rocket fuel
Which of the following polymer is bio-degradable polymer:
Match List-I (Vitamins) with List-II (Deficiency Diseases): {ll} List - I & List - II
A. Vitamin B12 & I. Cheilosis
B. Vitamin D & II. Convulsions
C. Vitamin B2 & III. Rickets
D. Vitamin B6 & IV. Pernicious anaemia
The list given below contains essential amino acids that are basic (\(X\)) and also non essential amino acids that are neutral \(Y\). \(X\) and \(Y\) respectively are:
• [a)] Lysine
• [b)] Alanine
• [c)] Serine
• [d)] Arginine
• [e)] Tyrosine
Match List-I (Metals) with List-II (Refining Methods): {ll} List - I & List - II
A. NICKEL & I. ELECTROLYTIC REFINING
B. TITANIUM & II. ZONE REFINING
C. GERMANIUM & III. VAN ARKEL METHOD
D. COPPER & IV. MOND PROCESS
The greater the valence of the flocculating ion added, the greater is its power to cause precipitation of a colloid. This rule is: