List of top Chemistry Questions

The correct order of bond angles of the following is
I. \( \text{H}_2\text{O} \)
II. \( \text{NH}_3 \)
III. \( \text{CH}_4 \)
IV. \( \text{SO}_2 \)
Which of the following oxides is highly basic?
Given equilibrium constants: H$_2$CO$_3$ ⇌ 2H$^+$ + CO$_3^{2–}$, $K = 2 \times 10^{-17}$
H$_2$CO$_3$ ⇌ H$^+$ + HCO$_3^-$, $K = 4 \times 10^{-7}$
Then the equilibrium constant for: HCO$_3^-$ ⇌ H$^+$ + CO$_3^{2–}$ is
Given below are two statements
Assertion (A): Ethylamine is stronger base than ammonia
Reason (R): It is due to $-$I effect of ethyl group
The correct answer is

What is the major product formed in the reaction given below?

What is the intermediate in the following reaction?
RCN + SnCl$_2$ + HCl $\longrightarrow$ RCHO
Jones reagent is used in which of the following conversions?

Match the following
List – I (Source)             List – II (Carboxylic Acid)
 

SourceCarboxylic Acid
A. VinegarI. HCOOH
B. ButterII. CH3CH2COOH
C. AntsIII. CH3COOH
 IV. CH3CH2CH2COOH

Which of the following exhibits optical isomerism?

Which of the following is/are correct?
i. Cr$_2$O$_3$ is an acidic oxide
ii. Mo(VI) and W(VI) are more stable than Cr(VI)
iii. All Cu(II) halides are known except iodide
iv. The E$^\circ$ value for Cr$^{3+}$/Cr$^{2+}$ is much more positive than Mn$^{3+}$/Mn$^{2+}$
Which of the following drug is used on diseased skin surface?
In which of the following reactions phosphine is not formed?
A polymer sample contains 5 molecules of molar mass 1000, 3 molecules of molar mass 500 and 2 molecules of molar mass 250. What is its weight average molecular weight (Mw)?
The sulphide ore of copper containing iron as impurity is removed in the form of a slag by adding an oxide of element X. Identify the element X.
5.0 mL of [AgI] / Ag$^+$ sol is coagulated by the addition of 15 mL of 0.001 M potassium iodide solution. The flocculation value of potassium iodide is
Identify the correct statements about order of reaction:
I) It is equal to the sum of the powers of concentration terms in rate equation
II) It is always a whole number
III) It is determined experimentally
IV) It is not applicable for complex reactions
Identify the macromolecular colloids from the list given below:
I. Synthetic rubber II. Rhombic sulphur III. Sodium stearate
IV. Cellulose V. Enzymes VI. Sodium lauryl sulphate
The correct order of atomic radii of Al, Ga, In, Tl is
Among the following the correct statements are:
I. Carbon black is obtained by burning hydrocarbons in a limited supply of air
II. Carbon black is obtained by burning hydrocarbons in absence of air
III. Coke is obtained by burning coal at high temperatures in a limited supply of air
IV. Coke is obtained by burning coal at high temperatures in absence of air

The decreasing order of p$K_b$ of the following aromatic amines is

Match the following:

CompoundReaction Type
A. CH2=CH2I. Electrophilic substitution reaction
B. CH3COOCH3II. Nucleophilic substitution reaction
C. C6H6III. Electrophilic addition reaction
D. CH3ClIV. Nucleophilic addition reaction
In aqueous solutions, the strongest reducing agents in Group 1 and Group 2 elements of the periodic table respectively are
For the reaction $2A(g) + B(g) \rightarrow 2C(g)$, if $\Delta U^\circ = -8.80$ kJ mol$^{-1}$ and $\Delta S^\circ = -50$ J K$^{-1}$ mol$^{-1}$ at 300 K, the correct statement is:
The correct equation for $K_c$ for the following reaction is:
A(l) + B(g) ⇌ C(g)
An organic compound containing C, H and N has 72.7% C, 13.1% H and 14.1% N. Its empirical formula is