NEET Practice Test - 20 - NEET MCQ

Which of the following statement(s) is/are correct?

(i) The atomic and ionic radii of alkaline earth metals are smaller than those of the corresponding alkali metals in the same periods.

(ii) Second ionisation enthalpies of the alkaline earth metals are smaller than those of the corresponding alkali metals.

(iii) Compounds of alkaline earth metals are more extensively hydrated than those of alkali metals

Haemoglobin contains 0.334% of iron by weight.

The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (at. wt. of Fe is 56) present in one molecule of haemoglobin are

The correct order of thermal stability of hydroxides is:

The reagent (s) which can be used to distinguish acetophenone from benzophenone is (are):

Among the following complexes, optical activity is possible in

The pK_a of an amino acid is 9.15. At what pH amino acid is 5% dissociated ?

T₅₀ of first -order reaction is 10 min. Starting with 10 mol L^–1, rate after 20 min is

Which of the following statement is false ?

SnO₂ is taken in basic medium and current is passed. Colloidal sol migrates towards

Which of the following is a broad spectrum drug?

The basicity of aniline is less than that of cyclohexylamine. This is due to

H₃BO₂ is

Benzoic acid gives benzene on being heated with X and phenol gives benzene on being heated with Y. Therefore X and Y are respectively

Formation of a solution from two components can be considered as

(i) pure solvent → separated solvent molecules, ΔH₁

(ii) pure solute → separated solute molecules, ΔH₂

(iii) separated solvent and solute molecules → solution, ΔH₃

Solution so formed will be ideal if

The final major product of the following reaction is :

Which of the following pairs of compounds are positional isomers ?

Match the columns

In which of the following regions hydrogen and helium are found :

The chemical system that is non-aromatic is

The cation that will not be precipitated by H₂S in the presence of dil. HCl is :

AB crystallizes in a body centered cubic lattice with edge length ‘a’ equal to 387 pm. The distance between two oppositely charged ions in the lattice is :

For the cell

Z_n | Zn²⁺ (1M) || Cu²⁺ (1M) | Cu, E°_cell is 1.10 V, E°_Cu2+_/Cu = 0.34 V and for the cell Cu | Cu²⁺ (1M) | | Ag⁺ (1M) | Ag, E°_cell = 0.46 V hence, E°_cell of the cell Zn | Zn²⁺ (1M) || Ag⁺ (1M) | Ag is

The correct order of ionic radii of Y³⁺, La³⁺, Eu³⁺ and Lu³⁺ is

In the froth floatation process for the purification of ores, the ore particles float because :

Which of the following organometallic compound is σ and π bonded?

The correct order of the decreasing ionic radii among the following isoelectronic species are :

0.45 g of acid of molecular weight 90 was neutralized by 20 ml. of a 0.5N caustic potash.

The basicity of an acid is