Question Bank Directory

Presence of which of the following conditions in urine are indicative of Diabetes Mellitus?

Given the following five species: $NH_3, AlCl_3, BeCl_2, CCl_4, PCl_5$. The total number of these species that do not have eight electrons around the central atom in its/their outermost shell, is:

A steady current of 1.5 A flows through a copper voltmeter for 10 min. If the electrochemical equivalent of copper is $30 \times 10^{-5} \text{ g C}^{-1}$, the mass of copper deposited on the electrode will be:

The half-life of a first-order reaction is $2000 \text{ years}$. If the concentration after $8000 \text{ years}$ is $0.02 \text{ M}$, then the initial concentration was:

For a reaction $3A \rightarrow 2B$, the average rate of appearance of B is given by $\frac{\Delta [B]}{\Delta t}$. The correct relation between the average rate of appearance of B with the average rate of disappearance of A is:

For the reaction, $2A + B \rightarrow 3C + D$, which of the following is an incorrect expression for the rate of reaction?

A wire of length L, area of cross section A is hanging from a fixed support. The length of the wire changes to $L_1$ when mass M is suspended from its free end. The expression for Young's modulus is :

Which of the following molecules acts as a Lewis acid?

Effective collisions are known to possess: A: Energy greater than the threshold energy. B: Breaking of old bonds in the reactant. C: Formation of a new bond in the product. D: High activation energy. E: Proper orientation. Choose the correct answer from the options given below:

The correct order of increasing C-X bond reactivity toward nucleophiles among the following is: I. [Missing] II. [Missing] III. $(\text{CH}_3)_3\text{C-X}$ IV. $(\text{CH}_3)_2\text{CH-X}$

Find the correct sequence of the bond enthalpy of the $\text{C-X}$ bond among the following:

$K_c$ and $K_p$ are not equal for a reaction given below:

During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide sequence in the mRNA would be:

The compound that will undergo $\text{S}_\text{N}1$ reaction with the fastest rate is:

A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of $\text{pH} = 10$ and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of the electrode would be:

A physician wishes to prepare a buffer solution at $\text{pH}=3.58$ that efficiently resists changes in pH yet contains only small concentration of the buffering agents. Which one of the following weak acids together with its sodium salt would be best to use?

Six similar bulbs are connected as shown in the figure with a DC source of emf E and zero internal resistance. The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section A and one from section B are glowing, will be :

A device that converts energy of the combustion of fuels like hydrogen and methane, directly into electrical energy is known as:

In the electrochemical cell: $\text{Zn}|\text{ZnSO}_4(0.01 \text{ M}) || \text{CuSO}_4(1.0 \text{ M})|\text{Cu}$, the emf of this Daniel cell is $E_1$. When the concentration of $\text{ZnSO}_4$ is changed to $1.0 \text{ M}$ and that of $\text{CuSO}_4$ is changed to $0.01 \text{ M}$, the emf changes to $E_2$. The relationship between $E_1$ and $E_2$ is : (Given, $\frac{RT}{F} = 0.059$)

Which of the following is a coloured and paramagnetic compound?