List of top Chemistry Questions

The spin-only magnetic moments of the complexes \([Mn(CN)_6]^{3-}\) and \([Co(C_2O_4)_3]^{3-}\) are respectively:

PHBV is a biodegradable polymer of two monomers X and Y. X and Y respectively are:
The carbohydrate which does not react with ammoniacal \( AgNO_3 \) solution is:

The major product (X) formed in the given reaction is an example of:

An alcohol X (\( C_4H_{10}O \)) reacts with conc. HCl at room temperature to give Y (\( C_4H_9Cl \)). Reaction of X with Cu at 573 K gave Z. What is Z?
A carbonyl compound X (\( C_3H_6O \)) on oxidation gave a carboxylic acid Y (\( C_3H_6O_2 \)). Oxime of X is:
Some substances are given below Ag: CO\(_2\) (s); SiO\(_2\) (s); ZnS (s) SO\(_2\) (s); A/N: HCl (s); H\(_2\)O (s) The number of molecular solids and network solids in the above list is respectively.
Which one of the following is used as piezoelectric material?
Two statements are given below: I. In dry cleaning, the solvent \(Cl_2C\) = \(CCl_2\) was earlier used and now it is replaced by liquefied \(CO_2\).
II. In bleaching of paper, \(H_2O_2\) was used earlier and now it is replaced by chlorine gas.
What is the conjugate base of chloric acid?
A golf ball of mass ‘m’ has a speed of 50 m/s. If the speed can be measured within accuracy of 2\%, the uncertainty in the position is
Which one of the following sets is not correctly matched?
Arrange the following pesticides in the chronological order of their release into the market: A: Organophosphates
B: Organochlorides
C: Sodium chlorate
Identify the incorrect statements from the following: I. \( \Delta S_{\text{system}} = (\Delta S_{\text{total}} + \Delta S_{\text{sur}}) \) II. \( A(l) \rightarrow A(s) \); for this process entropy change decreases III. Entropy units are \( J \ K^{-1} \ mol^{-1} \)

At T(K), the following graph is obtained for an ideal gas.

Which of the following graphs correctly represents the work done on the gas (shaded part)?

An organic compound \( C_7H_5N \) on reduction with reagent X gave Y. Reaction of Y with p-toluene sulphonyl chloride gave Z which is insoluble in alkali. X and Y respectively are:
The melting point of o-hydroxybenzaldehyde (A) is lower than that of p-hydroxybenzaldehyde (B). This is because:
Eutrophication can lead to:
The bond angles H-O-N and O-N-O in the planar structure of nitric acid molecule are respectively:

The organic halide, which does not undergo hydrolysis by SN1 mechanism is:

Option 1: C6H5CH2Cl

Option 2: CH2CH - CH2Cl

Option 3: (CH3)3C - Cl

Option 4: CH3 - CH = CH - Cl

Two statements are given below 
Statement I: Benzanamine can be prepared from phthalimide. 
Statement II: Benzanamine is less basic than phenyl methanamine.

What is X in the following reaction? 


 
 

Amino acids are represented by the following general structure: 

Find out the pair in which amino acid is correctly matched with its group R: 
 

Sucrose is a disaccharide of which of the following?

In which of the following the polymer is correctly matched with the catalyst used for its preparation? 
I. Teflon - Persulphate 
II. Low density polythene - Triethyl aluminium and titanium tetrachloride 
III. Terylene - Zinc acetate/antimony trioxide