NEET TEST SERIES 150 CHEMISTRY

1. Given below are two statements.
Statement I: SF₆ exists but SH₆ does not.
Statement II: dπ-pπ bonding cannot take place in SH₆
Choose the correct answer from the options given below:

a) Statement I is incorrect but Statement II is true.
b) Both statement I and Statement II are true.
c) Both Statement I and Statement II are false.
d) Statement I is correct but statement II is false.

2. What is the correct IUPAC name of the following coordination compound.
[Cr(py)₃ Cl₃]

a) Trichlorotripyridinium chromium (III)
b) Tripyridiniumtrichloro chromium (III)
c) Trichlorotripyridine chromium (III)
d) Trichlorotripyridine chromium (II)

3. The incorrect statements among the following is:

a) Glucose on oxidation with Br₂ / H₂O gives gluconic acid.
b) The pentaacetate of glucose does not react with hydroxyl amine.
c) The six membered cyclic structure of glucose is called furanose structure.
d) The two cyclic hemiacetal forms of glucose are anomers of each other.

4. How many isomers are possible for coordination complex [Co(NH₃)₅ (NO₂)] (NO₃)₂.

(a) 6
(b) 10
(c) 4
(d) 12

5. The numbers of mole of phenylhydrazine needed to form fructosazone when react with fructose is:

(a) 1
(b) 2
(c) 3
(d) 4

7. Statement I: Compounds containing -CHO group are easily oxidised to corresponding carboxylic acids.
      Statement II: Carboxylic acids can be reduced to alcohols by treatment with Li A1H₄ .

a) Both statement I and II are correct.
b) Both statement I and II are incorrect.
c) Statement I is correct but statement II is incorrect.
d) Statement II is correct but statement I is incorrect.

8. The rate constant (k) of a reaction is measured at different temperatures (T), and the data are plotted in the given figure. The activation energy of the reaction in kJ mol^-1 is:

(a) 2/R
(b) 1/R                 
(c) R
(d) 2R

9. The incorrect statement is:

(a) Manganate and permanganate ions are tetrahedral
(b) In manganate and permanganate ions, the -bonding takes place by overlap of p-orbitals of oxygen and d- orbitals of manganese
(c) Manganate and permanganate ions are paramagnetic
(d) Manganate ion is green in colour and permanganate ion is purple in colour