List of practice Questions

The reaction involve(s)
The reaction involve(s)
The reason(s) for the lower stability of $Si_2H_6$ compared to $C_2H_6$ is/are
For an N-atom nonlinear polyatomic gas, the constant volume molar heat capacity Cv,m has the expected value of 3(N-1)R, based on the principle of equipartition of energy. The correct statement(s) about the measured value of Cv,m is/are
Zinc containing enzyme(s) is/are
The conversion of $ICl$ to $ICl^+$ involve(s)
The common point defect(s) in a solid is/are
Among of the following
the number of aromatic compounds is _______ .
the number of aromatic compounds is _______ .
The number of stereoisomers possible for the major product formed in the reaction
The number of stereoisomers possible for the major product formed in the reaction is _______.
is ________.
The number of signals observed in the $^1H NMR$ spectrum of the compound
The number of signals observed in the $^1H NMR$ spectrum of the compound
is _________.
The reaction of 122 g of benzaldehyde with 108 g of phenylhydrazine gave 157 g of the product
The reaction of 122 g of benzaldehyde with 108 g of phenylhydrazine gave 157 g of the product
The yield of the product is _________%. (round off to the nearest integer)

The number of unpaired electrons in $[Co(H_2O)_6]^{2+}$ is ________.

The B-B bond order in $B_2$ is ______.
The number of significant figures in $5.0820 x 10^2$ is _________.
The d spacing for the first-order X-ray ($\lambda$= 1.54 Å) diffraction event of metallic iron (fcc) at $2\theta= 20.2°$ is _______.Å. (round off to three decimal places)
The volume fraction for an element in an fcc lattice is ____________ . (round off to two decimal places)
steady current of 1.25 A is passed through an electrochemical cell for 1.5 h using a 12 V battery. The total charge, Q, drawn during this process is __________ Coulombs. (round off to the nearest integer)
The specific rotation of optically pure (R)-1-phenylethylamine is +40 (neat, 20 °C). A synthetic sample of the same compound is shown to contain 4:1 mixture of (S)- and (R)-enantiomers. The specific rotation of the neat sample at 20 °C is ____________. (round off to the nearest integer)
The number of $\beta$ particles emitted in the nuclear reaction $^{238}U_{92} → ^{206}Pb_{82}$ is _______.
Iron is extracted from its ore via the reaction
$Fe_2O_3, + 3 CO→ 2 Fe + 3CO_2$
The volume of CO (at STP) required to produce 1 kg of iron is ________liters. (round off to the nearest integer)
[Given: Atomic wt. of Fe = 56; assume STP to be 0 °C and 1 atm]
Total degeneracy (number of microstates) for a Ti3+ ion in spherical symmetry is ____.
A galvanic electrochemical cell made of Zn2+/Zn and Cu2+/Cu half-cells produces 1.10 V at 25°C. The ratio of |Zn2+| to |Cu2+| is maintained at 1.0. The ΔG° for the reaction when 1.0 mol of Zn gets dissolved is____kJ. (round off to the nearest integer)
[Given: Faraday's constant = 96485 C mol-1]
At constant volume, 1.0 kJ of heat is transferred to 2 moles of an ideal gas at 1 atm and 298 K. The final temperature of the ideal gas is ____K. (round off to one decimal place)
[Given: R = 8.314 J K-1 mol-1]
Two close lying bands in a UV spectrum occur at 274 nm and 269 nm. The magnitude of the energy gap between the two bands is ____cm-1. (round off to the nearest integer)
The pH of an aqueous buffer prepared using CH3COOH and CH3COO Na+ is 4.80.
The quantity \(\frac{[CH_3COO^-]-[CH_3COOH]}{[CH_3COOH]}\) is _____. (round off to three decimal places)
[Given: pKa of CH3COOH in water is 4.75]
At constant temperature, 6.40 g of a substance dissolved in 78 g of benzene decreases the vapor pressure of benzene from 0.125 atm to 0.119 atm. The molar mass of the substance is ____g mol-1. (round off to one decimal place)
[Given: Mol. wt. of benzene = 78 g mol-1]