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NEET Chemistry Solved Question Paper 2006

Multiple Choice Questions

11.
The pair whose both species are used in antiacid medicinal preparation is

NaHCO₃ and Mg(OH)₂

Na₂CO₃ and Ca(HCO₃)₂

Ca(HCO₃)₂ and Mg(OH)₂

Ca(OH)₂and NaHCO₃.

NaHCO₃ and Mg(OH)₂

Intestine is acidic due to formation of HCl during digestion. Excessive acidity in the intestine creates problem of intestinal ulcer, gastric reflux and oesophagitis. The compound which reduced or neutralise acidity are called antacids.

NaHCO₃+ HCl $\to$ NaCl+ H₂O + CO₂
Mg(OH)₂ + 2HCl $\to$ MgCl₂ + 2H₂O

12.

The charge required for the reduction of 1 mol of ${MnO}_{4}^{-}$ to MnO₂ is

13.

The energy gaps (E_g) between valence band and conduction band for diamond, silicon and germanium are in the order

E_g(diamond) > E_g(silicon) > E_g(germanium)
E_g(diamond) <E_g(silicon) <E_g(germanium)
E_g(diamond) = E_g(silicon)= E_g (germanium)
E_g (diamond)> E_g (germanium)> E_g (silicon).

14.

Among the following L-serine is

15.

Among the following which one can have a meso form?

CH₃CH(OH)CH(Cl)C₂H₅
CH₃CH(OH)CH(OH)CH₃
C₂H₅CH(OH)CH(OH)CH₃
HOCH₂CH(Cl)CH₃

16.

The major product obtained on the monobromination (with Br₂/FeBr₃) of the following compound A is

17.

Assertion : [Co(NO₂)₃(NH₃)₃] does not show optical isomerism.

Reason : It has a plane of symmetry.

If both assertion and reason are true and reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true, but reason is false.
Both assertion and reason are false statements.

18.

Assertion: Silicones are hydrophobic in nature.

Reason: Si-O- Si linkages are moisture sensitive.

If both assertion and reason are true and reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true, but reason is false.
Both assertion and reason are false statements.

19.

Assertion: Diastereomers have different physical properties.

Reason : They are non-superimposable mirror images.

If both assertion and reason are true and reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true, but reason is false.
Both assertion and reason are false statements.

20.

Assertion: The presence ofnitro group facilitates nucleophilic substitution reactions in aryl halides.

Reason: The intermediate carbanion is stabilised due to the presence of nitro group.

If both assertion and reason are true and reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true, but reason is false.
Both assertion and reason are false statements.