JEE Mains JEE Advance BITSAT
JEE Mains | PYQ

Chemistry

Which hydride among the following is less stable?

Given below are two statements one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A): \( [\mathrm{CoCl(NH_3)_5}]^{2+} \) absorbs at lower wavelength of light with respect to \( [\mathrm{Co(NH_3)_5(H_2O)}]^{3+} \)
Reason (R): It is because the wavelength of the light absorbed depends on the oxidation state of the metal ion.
In the light of the above statements choose the correct answer from the options given below:

32.

Compound from the following that will not produce precipitate on reaction with \( \mathrm{AgNO_3} \) is:

33.

Given below are two statements one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A): can be subjected to Wolff-Kishner reduction to given
Reason (R): Wolff-Kishner reduction is used to convert
In the light of the above statements, choose the correct answer from the options given below :

34.

Alkali metal from the following with least melting point is :

35.

Product \([X]\) formed in the above reaction is :

36.

A solution is prepared by adding \( 2 \, \text{g} \) of “X” to \( 1 \, \text{mole} \) of water. Mass percent of “X” in the solution is:

37.

What weight of glucose must be dissolved in \( 100 \, \text{g} \) of water to lower the vapour pressure by \( 0.20 \, \text{mm Hg} \)? (Assume dilute solution is being formed)
Given: Vapour pressure of pure water is \( 54.2 \, \text{mm Hg} \) at room temperature. Molar mass of glucose is \( 180 \, \text{g mol}^{-1} \).

38.

Which of the following compounds is an example of Freon?

39.

If \( \mathrm{Ni^{2+}} \) is replaced by \( \mathrm{Pt^{2+}} \) in the complex \( [\mathrm{NiCl_2Br_2}]^{2-} \), which of the following properties are expected to get changed?
I. Geometry
II. Geometrical isomerism
III. Optical isomerism
IV. Magnetic properties

40.

The major product formed in the following reaction is:

I.
II.
III.
IV.

41.

Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A): A solution of the product obtained by heating a mole of glycine with a mole of chlorine in presence of red phosphorous generates chiral carbon atom
Reason (R): A molecule with \( 2 \) chiral carbons is always optically active
In the light of the above statements, choose the correct answer from the options given below:

42.

For a chemical reaction \( A + B \rightarrow \text{Product} \), the order is \( 1 \) with respect to \( A \) and \( B \).

Rate \( \text{mol L}^{-1} \text{ S}^{-1} \)	\([A]\) \( \text{mol L}^{-1} \)	\([B]\) \( \text{mol L}^{-1} \)
\( 0.10 \)	\( 20 \)	\( 0.5 \)
\( 0.40 \)	\( x \)	\( 0.5 \)
\( 0.80 \)	\( 40 \)	\( y \)

What is the value of \( x \) and \( y \)?

43.

The magnetic moment is measured in Bohr Magneton \( (\text{BM}) \)
Spin only magnetic moment of Fe in \( [\text{Fe}(\text{H}_2\text{O})_6]^{3+} \) and \( [\text{Fe}(\text{CN})_6]^{3-} \) complexes respectively is:

44.

Match column I with column II.

Column I	Column II
I. \( \text{Mg}(\text{NH}_4)\text{PO}_4 \)	\( \text{P}. \) Brown
II. \( \text{K}_3[\text{Co}(\text{NO}_2)_6] \)	\( \text{Q}. \) White
III. \( \text{MnO}(\text{OH})_2 \)	\( \text{R}. \) Yellow
IV. \( \text{Fe}_4[\text{Fe}(\text{CN})_6]_3 \)	\( \text{S}. \) Blue

Choose the correct answer from the options given below:

45.

Given below are two statements:
Statement I: In the metallurgy process, sulphate ore is converted to oxide before reduction
Statement II: Oxide ores in general are easier to reduce
In the light of the above statements, choose the most appropriate answer from the options given below:

46.

Given below are two statements:
Statement I: Ethene at \( 333 \) to \( 343 \, \text{K} \) \( 6\text{-}7 \, \text{atm} \) pressure in the presence of \( \text{AlEt}_3 \) and \( \text{TiCl}_4 \) undergoes addition polymerization to give LDP.
Statement II: Caprolactam at \( 533\text{-}543 \, \text{K} \) in \( \text{H}_2\text{O} \) through step growth polymerizes to give Nylon \( 6 \)
In the light of the above statements, choose the correct answer from the options given below:

47.

One mole of \( \text{P}_4 \) reacts with \( 8 \) moles of \( \text{SOCl}_2 \) to give \( 4 \) moles of \( A \), \( x \) mole of \( \text{SO}_2 \) and \( 2 \) moles of \( B \). \( A \), \( B \) and \( x \) respectively are:

48.

Compound ‘B’ is:

49.

Which one of the following pairs is an example of polar molecular solids?

50.

The maximum number of lone pairs of electrons on the central atom from the following species is ________ \( \mathrm{ClO_3^-} \), \( \mathrm{XeF_4} \), \( \mathrm{SF_4} \) and \( \mathrm{I_3^-} \).

51.

The number of correct statements from the following is ________.
A. For \( 1s \) orbital, the probability density is maximum at the nucleus
B. For \( 2s \) orbital, the probability density first increases to maximum and then decreases sharply to zero
C. Boundary surface diagrams of the orbitals encloses a region of \( 100\% \) probability of finding the electron
D. \( p \) and \( d \)-orbitals have \( 1 \) and \( 2 \) angular nodes respectively
E. Probability density of \( p \)-orbital is zero at the nucleus

52.

The volume of hydrogen liberated at \( \mathrm{STP} \) by treating \( 24 \, \mathrm{g} \) of magnesium with excess of hydrochloric acid is ________ \( \times 10^{-2} \, \mathrm{L} \).
Given: Molar volume of gas is \( 22.4 \, \mathrm{L} \) at \( \mathrm{STP} \)
Molar mass of magnesium is \( 24 \, \mathrm{g \, mol^{-1}} \)

53.

The number of correct statement about modern adsorption theory of heterogeneous catalysis from the following is _______.
A. The catalyst is diffused over the surface of reactants
B. Reactants are adsorbed on the surface of the catalyst
C. Occurrence of chemical reaction on the catalyst’s surface through formation of an intermediate
D. It is combination of intermediate compound formation theory and the old adsorption theory
E. It explains the action of the catalyst as well as those of catalytic promoters and poisons

54.

The number of correct statements from the following is ________.
A. \( E_{cell} \) is an intensive parameter
B. A negative \( E^{\ominus} \) means that the redox couple is a stronger reducing agent than the \( \mathrm{H^{+}/H_2} \) couple
C. The amount of electricity required for oxidation or reduction depends on the stoichiometry of the electrode reaction
D. The amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolyte

55.

\( \mathrm{Mg(NO_3)_2 \, XH_2O} \) and \( \mathrm{Ba(NO_3)_2 \, YH_2O} \) represent formula of the crystalline forms of nitrate salts. Sum of \( X \) and \( Y \) is ________.

56.

The total number of intensive properties from the following is ________ Volume, Molar heat capacity, Molarity \( E^{\ominus} \) cell, Gibbs free energy change. Molar mass. Mole

57.

\( 4.5 \) moles each of hydrogen and iodine is heated in a sealed ten litre vessel. At equilibrium \( 3 \) moles of HI were found. The equilibrium constant for \( \mathrm{H_2(g) + I_2(g) \rightleftharpoons 2HI(g)} \) is ________.

58.

Number of compounds from the following which will not produce orange red precipitate with Benedict solution is ________.
Glucose, maltose, sucrose, ribose, \( 2 \)-deoxyribose, amylose, lactose

59.

The number of possible isomeric products formed when \( 3 \)-chloro-\( 1 \)-butene reacts with HCl through carbocation formation is ________.

JEE Main 2023 11th April Evening Shift

Physics Chemistry Mathematics

← PreviousQuestion 39 of 90Next →

JEE MainsJEE AdvanceBITSATJEE Mains | PYQ

JEE Mains JEE Advance BITSAT
JEE Mains | PYQ