List of top Chemistry Questions

How does the size of blood cells change when placed in an aqueous solution containing more than 0.9% (mass/volume) sodium chloride?
Give below are two statements:
Statement-I : Noble gases have very high boiling points. 
Statement-II: Noble gases are monoatomic gases. They are held together by strong dispersion forces. Because of this they are liquefied at very low temperature. Hence, they have very high boiling points. 
In the light of the above statements, choose the correct answer from the options given below.
Evaluate the following statements related to group 14 elements for their correctness.
(A) Covalent radius decreases down the group from C to Pb in a regular manner.
(B) Electronegativity decreases from C to Pb down the group gradually.
(C) Maximum covalence of C is 4 whereas other elements can expand their covalence due to presence of d orbitals.
(D) Heavier elements do not form ppi-ppi bonds.
(E) Carbon can exhibit negative oxidation states.
Choose the correct answer from the options given below:
Why does oxygen show anomalous behavior ?
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Melting point of Boron (2453 K) is unusually high in group 13 elements.
Reason (R): Solid Boron has a very strong crystalline lattice. 
In the light of the above statements, choose the most appropriate answer from the options given below:
What happens when D-glucose is treated with the following reagents?
Number of isomeric products formed by monochlorination Of \(2-methyl \) \(butane\) in presence of sunlight is
Which reagent on reacting with phenol gives salicylaldehyde?
The ascending order of acidity of –OH group in the following compounds is: 
–OH group
Choose the correct answer from the options given below :
m–chlorobenzaldehyde on treatment with 50\(\%\) KOH solution yields
Sugar which does not give reddish brown precipitate with Fehling‟s reagent is:
The molecular formula of second homologue in the homologous series of monocarboxylic acid is
Consider the given reaction, identify the major product P.
Chemical Reaction
Identify compound (Z) in the following reaction sequence.
Reaction
Identify 'A' in the following reaction :
Reaction
Consider the given chemical reaction sequence :
Total sum of oxygen atoms in Product A and Product B are .........
Identify the product (P) in the following reaction:
product
Which of the following compounds will give silver mirror with ammoniacal silver nitrate?
(A) Formic acid
(B) Formaldehyde
(C) Benzaldehyde
(D) Acetone
Choose the correct answer from the options given below :
Identify the major products A and B respectively in the following set of reactions.
pyridine
The incorrect statement about Glucose is :
Match List I with List II
\(\begin{array}{|c|c|c|} \hline \text{LIST-I} & & \text{LIST-II} \\ \hline \text{A. Glucose/NaHCO}_3/\Delta & & \text{I. Gluconic acid} \\ \text{B. Glucose/HNO}_3 & & \text{II. No reaction} \\ \text{C. Glucose/HI/} \Delta & & \text{III. n-hexane} \\ \text{D. Glucose/Bromine water} & & \text{IV. Saccharic acid} \\ \hline \end{array}\)
Choose the correct answer from the options given below:
From the vitamins \( A, \, B_1, \, B_6, \, B_{12}, \, C, \, D, \, E, \, \text{and} \, K \), the number of vitamins that can be stored in our body is ______.
DNA molecule contains 4 bases whoes structure are shown below. One of the structure is not correct, identify the incorrect base structure.
Which of the following is the correct structure of L-Glucose ?
Total number of essential amino acid among the given list of amino acids is _______.
Arginine, Phenylalanine, Aspartic acid, Cysteine, Histidine, Valine, Proline