List of top Chemistry Questions asked in GAT-B

What is the half-life of a zero order reaction that takes 25 minutes for 80% completion?

The ratio of the velocity of the hydrogen molecule to that of the oxygen molecule under identical conditions is:

The rate of a reaction, 2A + B $\rightarrow$ Products, is $Rate = k[A]^2[B]$. The value of the rate constant (k) can be increased by:

Which one of the following represents the correct electronic orbital configuration of Phosphorus (+3) ion ($P^{3+}$)?

The boiling points of four liquids are shown below:

What is the approximate vapor pressure of an isopropanol solution containing 9.2 g of a non volatile solute, glycerol ($C_{3}H_{8}O_{3}$) and 60 g of isopropanol ($C_{3}H_{8}O$) at $82^{\circ}C$? Given vapor pressure of pure isopropanol at $82^{\circ}C$ is 100 kPa.

An organic compound contains 69.77% C, 11.63% H and 18.6% O. Its molecular formula is same as its empirical formula. The number of carbon atoms present per molecule would be:

What is the molarity of pure acetic acid? Assume density of acetic acid = 1 g/ml and Molecular Weight = 60 g/mol.

The correct order of increasing acidic behavior of the following compounds is:

An oxidizing agent is defined as a

The molarity of pure water is

Emulsifier is an agent which

$\alpha$-D-glucose and $\beta$-D-glucose are

D-Alanine and L-Alanine are technically known as

Aqueous-organic solvents will have:

What are the number of moles in 100 ml water (density = 1 g/ml) and in 100 ml heavy water (density = 1.11 g/ml) respectively?

How much will 1 mole of glucose weigh (in grams) on the Earth (E) and on the Moon (M)?

The half life of a chemical reaction is 1386 seconds. The specific rate constant for the reaction is:

In ethanol, $C_{2}H_{5}OH$, there are covalent bonds, hydrogen bonds and van der Waals' forces. Which bonds or forces are broken when ethanol is vaporized?

The equation for the complete combustion of butane is:
$2C_{4}H_{10} + 13O_{2} \rightarrow 8CO_{2} + 10H_{2}O$
What is the amount (in mole) of carbon dioxide formed by the complete combustion of three moles of n-butane?

Which of the following conditions allow a reaction to be spontaneous?

Which of following reactions has a positive entropy change ($\Delta S^{\circ}$)?

In a first order reaction, a straight line is obtained when plotting

Which of the following organohalogens contains the largest number of molecules?

Which of the following represents the Heisenberg Uncertainty principle?