NEET 2020 Chemistry Questions

The correct option for free expansion of an ideal gas under adiabatic condition is:

Hydrolysis of sucrose is given by the following reaction: $\ce{Sucrose + H2O <=> Glucose + Fructose}$. If the equilibrium constant ($K_c$) is $2 \times 10^{13}$ at $300\ \text{K}$, the value of $\Delta_r G^\circ$ at the same temperature will be:

For the reaction $\ce{2Cl(g) -> Cl2(g)}$, the correct option is:

Which of the following statements is not correct about diborane?

Identify a molecule which does not exist.

Which of the following set of molecules will have zero dipole moment?

A tertiary butyl carbocation is more stable than the secondary butyl carbocation because of which one of the following?

Paper chromatography is an example of

For the elimination reaction of 2-bromopentane to form pent-2-ene, consider the following statements: (a) It is a $\beta$-elimination reaction. (b) It follows Zaitsev's rule. (c) It is a dehydrohalogenation reaction. Which of the statements are correct?

Match the following oxides with their nature. Column-I (Oxide) (a) \ce{CO} (b) \ce{BaO} (c) \ce{Al2O3} (d) \ce{Cl2O7} Column-II (Nature) (i) Basic (ii) Neutral (iii) Acidic (iv) Amphoteric Which one of the following is correct?

Match the following IUPAC provisional names with their IUPAC official names. Column-I (Name) (a) Unnilunium (b) Unniltrium (c) Unnilhexium (d) Unununnium Column-II (IUPAC Official name) (i) Mendelevium (ii) Lawrencium (iii) Seaborgium (iv) Darmstadtium Which one of the following is correct?

Which of the following alkane cannot be made in good yield by Wurtz reaction?

An alkene on ozonolysis gives methanal (\ce{HCHO}) as one of the products. Its structure is:

The number of protons, neutrons and electrons in $^{175}_{71}\ce{Lu}$, respectively, are:

The calculated 'spin-only' magnetic moment of \ce{Ti^2+} ($3d^{2}$) is:

What is the change in oxidation number of carbon in the following reaction? \ce{CH4(g) + 4Cl2(g) -> CCl4(l) + 4HCl(g)}

Which one of the following has the maximum number of atoms?

Reaction between acetone and methylmagnesium chloride, followed by hydrolysis, will give:

The elimination reaction of 2-bromopentane to form pent-2-ene is: (a) a $\beta$-elimination reaction (b) follows Zaitsev (Saytzeff) rule (c) a dehydrohalogenation reaction (d) a dehydration reaction The correct set of statements is:

What is the change in oxidation number of carbon in the following reaction? $\ce{CH4(g) + 4Cl2(g) -> CCl4(l) + 4HCl(g)}$

Which of the following alkanes cannot be made in good yield by the Wurtz reaction?

Which of the following is the correct order of increasing field strength of ligand to form coordination compound?

The calculated spin only magnetic moment of $\ce{Cr^2+}$ ion is:

Urea reacts with water to form A, which decomposes to form B. B, when passed through \ce{Cu^2+ (aq)}, gives a deep-blue coloured solution C. What is the formula of C?

The calculated 'spin-only' magnetic moment of $\ce{Ti^2+}$ ($3d^2$) is:

The reaction between benzaldehyde and acetophenone in the presence of dilute NaOH is known as:

The reaction between acetone (\ce{CH3COCH3}) and methylmagnesium chloride (\ce{CH3MgCl}) followed by hydrolysis gives

Identify compound X in the following reaction: \ce{C6H5-CH3 ->[{Cl2}][{h\nu}] X ->[{H2O}][{373 K}] C6H5-CHO}

Which of the following statements is not correct?

Which of the following is a basic amino acid?

Sucrose on hydrolysis gives:

Identify the incorrect statement.

The calculated spin only magnetic moment of \ce{Cr^2+} ion is:

The calculated 'spin-only' magnetic moment of \ce{Ti^2+} (\ce{3d^2}) is:

The mixture which shows positive deviation from Raoult's law is:

The freezing point depression constant ($K_f$) of benzene is 5.12 K kg mol⁻¹. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is (rounded off upto two decimal places):

Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give

Anisole on cleavage with \ce{HI} gives

On electrolysis of dil. sulphuric acid using platinum (\ce{Pt}) electrodes, the product obtained at the anode will be:

The number of Faradays ($F$) required to produce $20$ g of calcium from molten \ce{CaCl2} (Atomic mass of \ce{Ca} $= 40$ g mol$^{-1}$) is:

The rate constant for a first order reaction is $4.606\times10^{-3}\ \text{s}^{-1}$. The time required to reduce $2.0\ \text{g}$ of the reactant to $0.2\ \text{g}$ is:

An increase in the concentration of the reactants of a reaction leads to change in:

Which of the following amines will give the carbylamine test?