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Chemistry

Given below are two statements:
Statement (I): Both metals and non-metals exist in p and d-block elements.
Statement (II): Non-metals have higher ionization enthalpy and higher electronegativity than the metals.
In the light of the above statements, choose the most appropriate answer from the options given below:

62.

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): In aqueous solutions \( \mathrm{Cr}^{2+} \) is reducing while \( \mathrm{Mn}^{3+} \) is oxidizing in nature.
Reason (R): Extra stability to half filled electronic configuration is observed than incompletely filled electronic configuration.
In the light of the above statements, choose the most appropriate answer from the options given below:

63.

Given below are two statements:
Statement (I): \( \mathrm{SiO_{2}} \) and \( \mathrm{GeO_{2}} \) are acidic while \( \mathrm{SnO} \) and \( \mathrm{PbO} \) are amphoteric in nature.
Statement (II): Allotropic forms of carbon are due to property of catenation and \( p\pi - d\pi \) bond formation.
In the light of the above statements, choose the most appropriate answer from the options given below:

64.

The number of radial node/s for \( 3p \) orbital is:

65.

Solubility of calcium phosphate (molecular mass, \( M \)) in water is \( W \, \text{g} \) per \( 100 \, \text{mL} \) at \( 25^\circ \text{C} \). Its solubility product at \( 25^\circ \text{C} \) will be approximately.

66.

Match List-I with List-II.

List-I Compound	List-II Use
(A) Carbon tetrachloride	(I) Paint remover
(B) Methylene chloride	(II) Refrigerators and air conditioners
(C) DDT	(III) Fire extinguisher
(D) Freons	(IV) Non Biodegradable insecticide

Choose the correct answer from the options given below:

67.

The functional group that shows negative resonance effect is:

68.

\( [\mathrm{Co(NH_3)_6}]^{3+} \) and \( [\mathrm{CoF_6}]^{3-} \) are respectively known as:

69.

Which of the following compounds show colour due to d-d transition?

70.

Lassaigne’s test is used for detection of:

71.

Select the compound from the following that will show intramolecular hydrogen bonding.

72.

In the given reaction identify A and B

\(\text{CH}_3-\text{C}\equiv\text{C}-\text{CH}_3 + \text{H}_2 \xrightarrow{\text{Na}/\text{Liquid NH}_3} \text{"B"}\)

73.

The set of meta directing functional groups from the following sets is:

74.

Which among the following has highest boiling point?

75.

Given below are two statements:
Statement (I): A \( \pi \) bonding MO has lower electron density above and below the inter-nuclear axis.
Statement (II): The \( \pi^{*} \) antibonding MO has a node between the nuclei.
In the light of the above statements, choose the most appropriate answer from the options given below:

76.

The transition metal having highest \( 3^{rd} \) ionisation enthalpy is:

77.

\( \text{C}_2\text{H}_5\text{Br} \xrightarrow{\text{alc. KOH}} \text{A} \xrightarrow[\text{CCl}_4]{\text{Br}_2} \text{B} \xrightarrow[\text{Excess}]{\text{KCN}} \text{C} \xrightarrow[\text{Excess}]{\text{H}_3\text{O}^+} \text{D}\)
Acid D formed in above reaction is:

78.

Given below are two statements:
Statement (I): Dimethyl glyoxime forms a six-membered covalent chelate when treated with \( \mathrm{NiCl_2} \) solution in presence of \( \mathrm{NH_4OH} \).
Statement (II): Prussian blue precipitate contains ion both in \( (+2) \) and \( (+3) \) oxidation states.
In the light of the above statements, choose the most appropriate answer from the options given below:

79.

The strongest reducing agent among the following is:

80.

Match List-I with List-II.

List-I Reactants	List-II Product
(A) Phenol, \( \mathrm{Zn}/\Delta \)	(I) Salicylaldehyde
(B) Phenol, \( \mathrm{CHCl_3,\, NaOH,\, HCl} \)	(II) Salicylic acid
(C) Phenol, \( \mathrm{CO_2,\, NaOH,\, HCl} \)	(III) Benzene
(D) Phenol, Conc. \( \mathrm{HNO_3} \)	(IV) Picric acid

Choose the correct answer from the options given below:

81.

Total number of isomeric compounds (including stereoisomers) formed by monochlorination of \( 2 \)-methylbutane is _________.

82.

Mass of ethylene glycol (antifreeze) to be added to \( 18.6 \) kg of water to protect the freezing point at \( -24^\circ\mathrm{C} \) is __________ kg (Molar mass in \( \mathrm{g\, mol^{-1}} \) for ethylene glycol \( 62 \), \( K_f \) of water = \( 1.86 \, \mathrm{K\, kg\, mol^{-1}} \))

83.

For a certain reaction at \( 300 \, \text{K} \), \( K = 10 \), then \( \Delta G^\circ \) for the same reaction is __________ \( \times 10^{-1} \, \text{kJ mol}^{-1} \). (Given \( R = 8.314 \, \text{J K}^{-1} \text{mol}^{-1} \) )

84.

The number of tripeptides formed by three different amino acids using each amino acid once is ______________.

85.

\( 10 \, \text{mL} \) of gaseous hydrocarbon on combustion gives \( 40 \, \text{mL} \) of \( \text{CO}_2 (g) \) and \( 50 \, \text{mL} \) of water vapour. Total number of carbon and hydrogen atoms in the hydrocarbon is __________.

86.

The amount of electricity in Coulomb required for the oxidation of \( 1 \, \text{mol} \) of \( \text{H}_2\text{O} \) to \( \text{O}_2 \) is ______ \( \times 10^{5} \, \text{C} \).

87.

Number of compounds which give reaction with Hinsberg’s reagent is ___________.

88.

Following Kjeldahl’s method, \( 1 \, \text{g} \) of organic compound released ammonia, that neutralised \( 10 \, \text{mL} \) of \( 2 \, \text{M}\ \, \text{H}_2\text{SO}_4 \). The percentage of nitrogen in the compound is __________ \( \% \).

89.

Consider the following redox reaction: \( \mathrm{MnO_4^-} + \mathrm{H^+} + \mathrm{H_2C_2O_4} \rightleftharpoons \mathrm{Mn^{2+}} + \mathrm{H_2O} + \mathrm{CO_2} \)
The standard reduction potentials are given as below \( (E^\circ_{\text{red}}) \):
\( E^\circ_{\mathrm{MnO_4^-/Mn^{2+}}} = +1.51 \, \text{V} \)
\( E^\circ_{\mathrm{CO_2/H_2C_2O_4}} = -0.49 \, \text{V} \)
In the equilibrium constant of the above reaction is given as \( K_{\mathrm{eq}} = 10^{x} \) , then the value of \( x = \) __________. (nearest Integer)

90.

The following data were obtained during the first order thermal decomposition of a gas A at constant volume: \( \mathrm{A(g)} \rightarrow 2\mathrm{B(g)} + \mathrm{C(g)} \)

S. No.	Time/\( s \)	Total pressure/(\( \text{atm} \))
\( 1 \)	\( 0 \)	\( 0.1 \)
\( 2 \)	\( 115 \)	\( 0.28 \)

The rate constant of the reaction is __________ \( \times 10^{-2} \, \text{s}^{-1} \) (nearest integer)

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