CUET (UG) entrance exam Question Bank Solutions for Chemistry

The electrochemical cell stops working after some time because

A crystal with a ≠ b ≠ c and α = β = γ = 90° is

The heat of neutralization for the reaction KOH + HNO₃ ⇌ KNO₃ + H₂O When 0.5 mole of HNO₃ is mixed with 0.2 moles of KOH is:

A catalyst in a reaction changes which of the following?

Which one of the following does not achieve an octet of electrons in the central atom?

Calculate the standard EMF ofa cell which involves the following cell reactions

\[\ce{Zn + 2 Ag+ -> Zn^{2+} + 2 Ag}\]

Given that \[\ce{E^{o}_{Zn/Zn^{2+}}}\] = 0.76 volt and \[\ce{E^{o}_{Ag/Ag^{+}}}\] = – 0.80 volt.

Oxidation number of cobalt in K[Co(CO)₄] is

Who introduced the term covalent bond?

Which of the following exists as covalent crystals in the solid state?

The covalent bond length is the shortest in which one of the following bonds?

The nature of hybridisation in the ammonia molecule is

Which of the following statements about galvanic cell is incorrect

Oxidation number of carbon in CH₂Cl₂ is

Natural silk is a

In which of the following compounds, the oxidation number of iodine is fractional?

Calculate the angle at which first order reflection will occurs in an X-ray spectrometer when x ~ rays of wavelength \[\ce{1.54 \overset{\circ}{A}}\] are diffracted by the atoms of a crystal given that inter planer distance is \[\ce{0.04 \overset{\circ}{A}}\]

A current of 2.0 ampere passed for 5 hour through a molten salt deposits 22 g of the metal (Atomic mass = 177). The oxidation state of the metal in the metal salt is

Standard reduction electrode potentials of three metals A, B and C are respectively + 0.5 V, – 3.0 V. and – 1.2 V. The reducing powers of there metal is.

Given the data at 25°C

\[\ce{Ag + I- -> AgI + e-}\]; E° = – 0.152 V

\[\ce{Ag -> Ag+ + e-}\]; E° = – 0.800 V

The value of log K_sp for AgI is ______.

Cell reaction is spontaneous when