Lowest MP and BP is of

• Ar

• Xe

• He

• Ne

12.

H₃PO₃ is

• dibasic acid

• basic

• tribasic acid

• neutral

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

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

• Zn

• Fe

• Pb

• Hg

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

The molecule having largest dipole moment among the following is

• CHI₃

• CH₄

• CHCl₃

• CCl₄

Which of the following electronic configuration represents noble gas?

• ns²np⁶

• ns²np⁵

• ns²np⁴

• ns²np³

The molarity of pure water is:

• 100

• 55.6

• 18

• 5.56

The most reactive hydrocarbon is :

• methane

• ethane

• ethylene

• acetylene

The density of SO₂ at STP is 2.86 kg m³. Its density at 819°C and 2 atmospheres is:

• 0.715 kg m^-3

• 1.43 kg m^-3

• 2.86 kg m^-3

• 4.26 kg m^-3