List of top Chemistry Questions asked in UPCATET

Which of the following aldehydes does not form iodoform on heating with $\mathrm{I_2}$ and alkali?
The group which shows \(-I\) and \(-R\) effect is:
Oxidation number of hydrogen is (-1) in:
Hybridisation of \(\mathrm{Ni}\) in \(\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-\) is:}
Solubility of \(\mathrm{AgCl}\) in \(10^{-2} \text{M} \mathrm{NaCl}\) solution is (\( K_{sp_{\mathrm{AgCl}}} = 1.8 \times 10^{-10} \)):
In the balanced redox reaction \(\mathrm{Cr}_2\mathrm{O}_7^{2-} + \mathrm{SO}_3^{2-} \longrightarrow \mathrm{Cr}^{3+} + \mathrm{SO}_4^{2-}\), the ratio of the number of \(\mathrm{Cr}_2\mathrm{O}_7^{2-}\) ions to \(\mathrm{SO}_4^{2-}\) ions is:
No work is done during free expansion of an ideal gas:
Minimum bond length is of:
Polar molecule among the following is:
If a radiation of energy \( 4.25 \, \text{eV} \) falls on a metal surface, then the maximum kinetic energy of ejected electrons will be (work function of metal is \( 2.25 \, \text{eV} \)).
Incorrect match of IUPAC symbol of elements with its respective atomic number is:
Statement (A): Alkyl halides are not soluble in water.
Statement (B): Alkyl halides do not form H-bonds with water molecules through alkyl halide, but they are polar in nature. In light of the above statements, choose the most appropriate answer from the options given below:
Relation between rate constant and half-life for a first-order reaction is:
The given reaction is known as: \[ \text{PhCH}_2\text{CN} + \text{SnCl}_2 + \text{HCl} \xrightarrow{\text{H}_3\text{O}^+} \text{PhCH}_2\text{CH=NH} \]
Given below are two statements:
Statement I: Propene on treatment with diborane gives an addition product with the formula \( \left( (CH_3)_2 CH \right)_3 B \)
Statement II: Oxidation of \( \left( (CH_3)_2 CH \right)_3 B \) with Hydrogen peroxide in the presence of NaOH gives propan-2-ol
In the light of the above statements, choose the most appropriate answer from the options given below:
What is formed when chlorine gas is passed through slaked lime?
What is the molar mass of the carbonate ion \( CO_3^{2-} \)?
The melting point of cast iron is
The percentage of carbon in wrought iron is
What is the other name of quick silver?
Which of the following formula represents Alkene?
What is the chemical formula of Marsh gas?
What is the molecular formula of urea?
By heating ethyl alcohol from 160°C to 170°C, we obtain:
What is the IUPAC name of isopropyl alcohol?