Chemistry: Topic-wise Test- 4 - NEET MCQ

Potash alum is a double salt, its aqueous solution shows the characteristics of-

Cr₂O₇^2-  2CrO₄^2-, X and Y are respectively-

x is moles of HIO₄ consumed

The structure of the product formed in the reaction given below is -

, Products obtained in the above reaction are -

Vapour pressure of pure water at 298 K is 23.8 torr. Thus, vapour pressure of a solution containing 6 g urea and 68.4 g sucrose in 10 moles of water is

Vapour pressure of nitrobenzene (molar mass = 123 g mol^-1) is 3.6 kNm^-2 and that of water (molar mass = 18 g mol^-1) is 977 kNm^-2. They form immiscible mixture at the given temperature. Thus, percentage of nitrobenzene in the vapour phase is

At 298 K, the vapour pressure of pure water is 23.76 mm Hg and that of an aqueous solution is 22.98 mm Hg. Thus, molality of solution is (assume dilute solution) 

Elevation in boiling point of a molar (1 M) glucose solution (d = 1.2 g mL^-1) is

Relative lowering of vapour pressure of a non-volatile solute X in water is 0.05. If   K_b(H₂0) = 0.52° mol^-1  kg^-1.

(ΔT_b) = elevation in boiling point assuming a dilute solution

(AT_b)' = elevation in boiling point assuming a solution of moderate concentration then, {ΔT_b) - {ΔT_b)' =

Which has maximum osmotic pressure at temperature T K?

There is formation of Prussian blue when Fe³⁺ reacts with [Fe(CN)₆]^4-. Two solutions as shown are separated by a semipermeable membrane AB. Due to osmosis, there is

Three solutions of following in water are isothermal conditions as given:

Thus,

Only One Option Correct Type
This section contains 7 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct

Q.

The degree of dissociation (α ) o f weak electrolyte A_xB_y is related to van’t Hoff factor (i) by the expression

[AIEEE 2011]

0.004 M Na₂S0₄ aqueous solution is isotonic with 0.01 M glucose solution at 300 K. Thus, degree of dissociation of Na₂S0₄ is

When 20 g of naphthoic acid (C₁₁H₈O₂) is dissolved in 50 g of benzene, a freezing point depression of 2 K is observed. [K_f (benzene) = 1.72Kmol^-1 kg]. The van’t Hoff factor (i) is 

[IIT - JEE 2007]

An aqueous solution of a solute AB has boiling point of 101.08° C and freezes at -1 .80 °C . AB is found to be 100% ionised at boiling point. If K_b /K_f = 0.3, then AB

Among the alkenes which one produces tertiary butyl alcohol on acid hydration

What is the correct increasing order of acidity of the following?

Which of the following can be used for the distinction of ethanol from phenol?

Consider the following reaction,

The above reaction can best be brought about by

Passage III

When suspected drunk drivers are tested with a breathalyser, the alcohol (ethanol) in the exhaled breath is oxidised to ethanoic acid with an acidic solution of potassium dichromate.

Q.

Under standard state, E^°_cell of the breathalyser would be  

Passage III

When suspected drunk drivers are tested with a breathalyser, the alcohol (ethanol) in the exhaled breath is oxidised to ethanoic acid with an acidic solution of potassium dichromate.

Q.

Under the condition of unit activity of each species,emf recorded in the breathalyser at pH 4 would be  

E° values of Mⁿ⁺ + ne^- → M are given below
Fe²⁺/Fe -0.44 V, Mg²⁺/Mg -2.37 V, Pt(H₂)/H⁺ 0.00 V,
AI³⁺/AI -1.66 V , Zn²⁺/Zn - 0.76 V, Cu²⁺/Cu +0.34 V,
Ag⁺/Ag + 0.80 V, Ni²⁺/Ni -0.26 V

How many of the metals can be used to prevent corrosion of Ni to Ni²⁺?

A fully charged battery contains 500 mL of 5.00 M H₂SO₄. What is the concentration of H₂SO₄ in the battery after 6.0 A of current is drawn from the battery for 13.40 h?

A hydrogen-oxygen fuel cell opeartes on the simple reaction:

If the cell is designed to produce 1.46A of current and if the H₂ is contained in a 1.0 L tank at 2.00 atm pressure at 298K, how long can the fuel cell operate(in hour) before the H₂ runs out.(Assume unlimited supply of oxygen)   

Matching List Type

Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct

Four electrolytic cells containing solution of ZnSO₄, AgNO₃, CuSO₄ and dil. H₂SO₄ are connected in series. A steady current of 1.5 A was passed through them until 77 mL of O₂ gas at STP is formed in anode compartment of H₂SO₄ solution. Match the different elements/gas formed In Column I with their values in Column II and select the answer from the codes given below. (Cu = 63.5, Zn = 65, Ag = 108, S = 32, H = 1, 0 = 16) 
 

Codes   i       ii      iii      iv