Chemistry Mock Test - NEET MCQ

B(mix) (CH₃)₂C—O—CH₃ A(mix)

, A is

50 ml of 1 M oxalic acid is shaken with 0.5 g wood charcoal. The final concentration of the solution after adsorption is 0.5 M. What is the amount of oxalic acid absorbed per gm of carbon?

Ferric chloride is applied to stop bleeding because

If same amount of electricity is passed through aqueous solution of AgNO₃ and CuSO₄ and the number of Ag and Cu atoms deposited are x and y respectively. Then

The e.m.f of the following Daniell cell at 298 k is E₁  Zn |ZnSO₄(0.01M)| CuSO₄(1.0M)| Cu When the concentration of ZnSO₄ is 1.0 M and that of CuSO₄ is 0.01 M, the e.m.f changed to E₂. what is the relationship between E₁ and E₂  ?

In the metallurgy of iron, when limestone is added to the blast furnace, the calcium ion ends up in

In acidic medium, KMnO₄ oxidises FeSO₄ solution. Which of the following statement is correct?

The decomposition of a substance follows first order kinetics. Its concentration is reduced to 1/8^th of its initial value in 24 minutes. The rate constant of the decomposition process is

For the reaction system 2NO(g) + O₂ (g) → 2NO₂ (g) the volume is suddenly reduced to half its value by increasing the pressure on it. If the reaction is of first order with respect to O₂ and second order with respect to NO, the rate of reaction will be

The freezing point of 0.1 M solution of glucose is -1.86⁰C. If an equal volume of 0.3 M glucose solution is added, the freezing point of the mixture will be

The vapour pressure of benzene at a certain temp. is 640 mm Hg. A non-volatile-non-electrolyte and weighing 2.175g is added to 39.0g of benzene. The vapour pressure of the solution is 600 mm Hg. What is the molecular weight of the solid substance ?

In the laboratory, sodium chloride is made by burning sodium in the atmosphere of chlorine. The salt obtained is yellow in colour. The cause of yellow colour is

In a solid AB having the NaCl structure, ‘A’ atoms occupy the corners of the cubic unit cell. If all the face-centred atoms along one of the axes are removed, then the resultant stoichiometry of the solid is

The products A and B in the following sequence of reactions

R₁ — CH₂NO₂ A   B

Respectively are:

An organic compound ‘A’ having molecular formula C₂H₃N on reduction gave another compound ‘B’. Upon treatment with nitrous acid, ‘B’ gave ethyl alcohol. On warming with chloroform and alcoholic KOH, it formed an offensive smelling compound ‘C’. The compound ‘C’ is

The missing product x in the following reaction will be

3SiF₄ + 4H₂O → Si(OH)₄ + x

A radioactive sample has half life of 1500 years. A sealed tube containing 1 g of a sample will contain g of the sample after 3000 years.The missing figure is

The basis for carbon – 14 dating method is that the

An aqueous solution of sodium sulphate is electrolysed using inert electrodes. The products at the cathode and anode are respectively

Which of the following statements is false for alkali metals ?

Which of the following volume (V)^-  temperature (T) plots represents the behaviour of one mole of an ideal gas at one atmospheric pressure?

Two glass bulbs A and B are connected by very small tube having a stop cock. Bulb A has a volume of 100 ml and contained the gas while bulb B was empty and had a volume of 150 ml. On opening the stop-cock, the pressure of the gas in bulb A will fall down to

Equal volumes of two gases which do not react together are enclosed in separate vessels. Their pressures at 100 mm and 400 mm respectively. If the two vessels are joined together, then what will be the pressure of the resulting mixture (temperature remaining constant)?

If the nitrogen atom had electronic configuration 1s⁷, it would have energy lower than that of the normal ground state configuration1s² 2s² 2p³ because the electrons would be closer to the nucleus. Yet 1s is not observed. It violates

What transition in the hydrogen spectrum would have the same wavelength as the Balmer transition, n = 4 to n = 2 in the He⁺ spectrum?

An element (X) forms compounds of the formula XCl₃,X₂O₅ and Ca₃X₂ but does not form XCl₅. Which of the following is the element X ?