Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

NEET Chemistry Solved Question Paper 2003

Multiple Choice Questions

11.

Lowest MP and BP is of

12.

H₃PO₃ is

dibasic acid
basic
tribasic acid
neutral

13.

35.4 mL of HCl is required for the neutralization of a solution containing 0.275 g of sodium hydroxide. The normality of hydrochloric acid is?

0.97 N
0.142 N
0.194 N
0.244 N

14.

When H₂S gas is passed in a metal sulphate solution in presence of NH₄OH, a white precipitate is produced. The metal is identified as

15.

The value of amu is which of the following?

1.57 $\times$ 10^-24 kg
1.66 $\times$ 10^-24 kg
1.99 $\times$ 10^-23 kg
1.66 $\times$ 10^-27 kg

16.

The molecule having largest dipole moment among the following is

CHI₃
CH₄
CHCl₃
CCl₄

17.

Which of the following electronic configuration represents noble gas?

ns²np⁶
ns²np⁵
ns²np⁴
ns²np³

18.

The molarity of pure water is:

100
55.6
18
5.56

19.
The most reactive hydrocarbon is :

methane

ethane

ethylene

acetylene

ethylene

In ethylene H₂C = CH₂, the C - C bond distance is 1.34 Å, therefore, the $π$ electrons of the double bond are easily exposed to the reactant (electrophiles) which readily react. In acetylene molecule HC $\equiv$ CH, although there are two $π$ bonds but these electrons are not exposed to the attacking reagents due to small bond distance of C $\equiv$ C bond (1.20 Å). A catalyst mercuric ion is therefore needed in reactions with actylene.