JEE-Main - Grade 11 - Chemistry - Equilibrium - Study ref# 2066
Predict if the solutions of the following salts are
neutral, acidic or basic :
Answer:
read moreJEE-Main - Grade 11 - Chemistry - Equilibrium - Study ref# 2067Ionic product of water at 310 k is 2.7×10-14. What is
the pH of neutral water at this temperature? Answer:
Therefore,
... read moreJEE-Main - Grade 11 - Chemistry - Equilibrium - Study ref# 2068Equal volumes of 0.002 M solutions of sodium iodate and
cupric chlorate are mixed together. Will it lead precipitation of copper
iodate?(For cupric iodate Ksp=7.4×10-8) Answer:
(Due to mixing of equal volumes, molar concentratio... read moreJEE-Main - Grade 11 - Chemistry - Equilibrium - Study ref# 2069Conjugate acid of a weak base is always stronger. What
will be decreasing order of basic strength of the following conjugate bases?
Answer: Conjugate acids ... read moreJEE-Main - Grade 11 - Chemistry - Equilibrium - Study ref# 2070Arrange the following in increasing order of pH
Answer: (i)KNO3 is a salt of a strong acid-strong base,
hence its aqueous solution is neutral; pH=7
(ii) CH3COONa is a salt of weak acid and strong
base, hence its aqueous solution is ... read moreJEE-Main - Grade 11 - Chemistry - Environmental Chemistry - Study ref# 2239What do you mean by ozone
hole? What are its consequences? Answer: In stratosphere, ozone is
continuously created and destroyed by the sun’s radiations. This result is an
equilibrium concentration of ozone. In 1980s atmospheric scientists wo... read moreJEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9738Under what
condition is E cell =0 or ∆r G=0? Answer: At the stage of
chemical equilibrium in the cell
E cell
=0
∆r G= −n F
=−n×F×0=0... read moreJEE-Main - Grade 12 - Chemistry - Chemical Kinetics - Study ref# 9749The role of a catalyst is to change
(a) Gibbs energy of reaction
(b) Enthalpy of reaction
(c) Activation of energy of reaction
(d) Equilibrium constant Answer: (c) The role of a catalyst is to change
the activation energy of reaction. ... read moreJEE-Main - Grade 12 - Chemistry - Surface Chemistry - Study ref# 9770At the equilibrium position in the
process of adsorption….. (a) ∆H > 0
(b) ∆H =T∆S
(c)
∆H>T∆S
(d)
∆H<T∆S Answer: As we know that, at equilibrium ∆G=0
... read moreJEE-Main - Grade 12 - Chemistry - The p-Block Elements - Study ref# 9826Which of the following statements are
correct?
(a) S – S bond is present in
(b) In peroxosulphuric acid Sulphur is in +6
oxidation state
(c) Iron powder along with and K2O is
used as catalyst in the preparation of NH3 by Haber’s ... read moreJEE-Main - Grade 12 - Physics - Magnetism and Matter - Study ref# 10524A short bar magnet of magnetic momentum
m= 0.32 J/T is placed in a uniform magnetic field of 0.15T. If the bar is
free to rotate in the plane of the field, which orientation would correspond
to its (a) stable and (b) unstable equilibrium? Wh... read moreJEE-Main - Grade 12 - Physics - Magnetism and Matter - Study ref# 10529A magnetic dipole is under the influence
of two magnetic fields. The angle between the field direction is 60°
and one of the fields has a magnitude of . If the dipole
comes to sta... read more
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