Browse and search thousands of solved questions for your preparation.
Free questions with full explanations — locked behind signup to protect quality.
Identify the incorrect match. Name: (a) Unnilunium, (b) Unniltrium, (c) Unnilhexium, (d) Unununium. IUPAC Official Name: (i) Mendelevium, (ii) Lawrencium, (iii) Seaborgium, (iv) Darmstadtium.
The state of hybridisation of carbons marked 2, 3, 5 and 6 in the following hydrocarbon are, respectively: $\overset{6}{\text{CH}_3}-\overset{5}{\text{CH}}=\overset{4}{\text{CH}}-\overset{3}{\text{CH}_2}-\overset{2}{\text{C}}\equiv\overset{1}{\text{CH}}$
The correct option for free expansion of an ideal gas under adiabatic condition is
In the hydrocarbon $\overset{6}{C}H_3-\overset{5}{C}H=\overset{4}{C}H-\overset{3}{C}H_2-\overset{2}{C}\equiv\overset{1}{C}H$, the state of hybridisation of carbons 1, 3 and 5 are in the following sequence:
What is the dominant intermolecular force that must be overcome in converting liquid $CH_3OH$ to a gas?
Which of the following species has a bond angle of 120$$^\circ$$?
In which of the following molecules are all the bonds not equal?
Intramolecular hydrogen bonding is present in:
The correct order of electronegativity of hybrid orbitals of carbon is:
Consider the following species: CN$$^+$$, CN$$^-$$, NO and CN. The highest bond order associated with:
Which one of the following statements is incorrect related to Molecular Orbital Theory?
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give :
Arrange the following hydrides in the order of decreasing bond angle: (A) SbH$$_3$$ (B) AsH$$_3$$ (C) PH$$_3$$ (D) NH$$_3$$
The enthalpy and entropy change for the reaction: $\text{Br}_2 (l) + \text{Cl}_2 (g) \rightarrow 2\text{BrCl} (g)$ are $30 \text{ kJ mol}^{-1}$ and $105 \text{ J K}^{-1}\text{ mol}^{-1}$ respectively. The temperature at which the reaction will be in equilibrium is :
Ozone is prepared by passing silent electric discharge through oxygen. In this reaction [AFMC 1998]:
The heat of combustion of carbon to $\text{CO}_2$ is $-393.5 \text{ kJ/mol}$. The heat released upon the formation of $35.2 \text{ g}$ of $\text{CO}_2$ from carbon and oxygen gas is:
Which of the following is true for an adiabatic process?
In which of the following reactions, the standard reaction entropy change ($\Delta S^{\circ}$) is positive, and standard Gibb's energy change ($\Delta G^{\circ}$) decreases sharply with increasing temperature?
Given the following reaction: $4\text{H(g)} \rightarrow 2\text{H}_2\text{(g)}$. The enthalpy change for the reaction is $-869.6 \text{ kJ}$. The dissociation energy of the H-H bond is:
The values of $\Delta H$ and $\Delta S$ for the given reaction are $170 \text{ kJ}$ and $170 \text{ J K}^{-1}$, respectively. $\text{C(graphite)} + \text{CO}_2\text{(g)} \rightarrow 2\text{CO(g)}$ This reaction will be spontaneous at: