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CHEMISTRYAminesMedium

Given below are two statements: Statement I: Benzenediazonium chloride is a colourless crystalline solid. It is insoluble in water but reacts with water when warmed. Statement II: Benzenediazonium chloride on reacting with $HCl$ in presence of copper powder gives chlorobenzene as the product. This is an example of Gatterman reaction. In the light of the above statements, choose the correct answer from the options given below:

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

The hybridisations of atomic orbitals of nitrogen in $\text{NO}_2^+$, $\text{NO}_3^-$ and $\text{NH}_4^+$ are:

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CHEMISTRYSolutionsEasy

The van't Hoff factor [$i$] for a dilute aqueous solution of the strong electrolyte barium hydroxide is?

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

The state of hybridisation of carbons marked 2, 3, 5 and 6 in the following hydrocarbon are, respectively: $\overset{6}{\text{CH}_3}-\overset{5}{\text{CH}}=\overset{4}{\text{CH}}-\overset{3}{\text{CH}_2}-\overset{2}{\text{C}}\equiv\overset{1}{\text{CH}}$

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic mass $16$ is:

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Easy

Match the coordination number and type of hybridisation with the distribution of hybrid orbitals in space based on Valence Bond Theory. **List I (Coordination number and type of hybridisation):** (a) 4, $sp^{3}$ (b) 4, $dsp^{2}$ (c) 5, $sp^{3}d$ (d) 6, $d^{2}sp^{3}$ **List II (Distribution of hybrid orbitals in space):** (i) Trigonal bipyramidal (ii) Octahedral (iii) Tetrahedral (iv) Square planar

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

Which of the two species, $NO_{3}^{-}$ or $H_{3}O^{+}$, has the correctly described properties listed below?

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CHEMISTRYChemical KineticsMedium

The rate constant of the reaction $A \rightarrow B$ is $0.6 \times 10^{-3} \text{ molar per second}$. If the concentration of A is $5 \text{ M}$, then the concentration of B after $20 \text{ min}$ is:

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

Arrange the following species in increasing order of their dipole moments: $NH_3, NF_3, BF_3, H_2O$

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

Which statement about peptide bonds is NOT true?

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

The correct order of bond angles in the following compounds/species is:

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

The hybridisations of atomic orbitals of nitrogen in NO$^+$, NO$_3^-$ and NH$_3$ respectively are:

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

$d\pi - p\pi$ bond is present in:

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

The pairs of species of oxygen and their magnetic behaviours are given below. Which of the following represents the correct description?

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Easy

The species, having bond angles of 120° is :

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

The correct order of increasing bond length of $\text{C-H}$, $\text{C-O}$, $\text{C-C}$ and $\text{C=C}$ is:

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Medium

The dipole moment of compound AB is 10.92 D and that of compound CD is 12.45 D. If the bond length of AB is 2.72 $\text{\AA}$ and that of CD is 2.56 $\text{\AA}$, then for these compounds the correct statement is:

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Easy

Among the following, the compound that is electron deficient is:

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CHEMISTRYOrganic Chemistry – Some Basic Principles and Techniques Easy

Intramolecular hydrogen bonding is present in:

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BIOLOGYMedium

Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth (1) Pharynx -> Oesophagus -> Crop -> Gizzard -> Ileum -> Colon -> Rectum (2) Pharynx -> Oesophagus -> Gizzard -> Crop -> Ileum -> Colon -> Rectum (3) Pharynx -> Oesophagus -> Gizzard -> Ileum -> Crop -> Colon -> Rectum (4) Pharynx -> Oesophagus -> Ileum -> Crop -> Gizzard -> Colon -> Rectum

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