Solved Chemistry MCQS Set 4

Reaction of acids with alcohols is also known as

Esterification

Alkalization

Saponification

None

Which species represents the electrpohile in aromatic nitrotaion?

NO^–₃

NO⁺₂

NO2

NO^–₂

Wt. of 112 ml of oxygen at NTP on liquification would be

0.64 g

0.96 g

0.16 g

0.32 g

The pure crystalline substance on being heated gradually first forms turbid liquid at constant temperature and still at higher temperature turbidity completely disapp-ears. The behaviour is a characteristic of substance forming

Liquid crystals

Allotropic crystal

Isomeric crystals

Isomorphous crystals

Which of the following represents elements in order of increasing atomic size?

Na, Mg, C

C, N, O

I, Br, Cl

Li, Na, K

Gooch crucible is used for the filtration of precipitates having

High concentration

High Solubility

Low Temperature

High ignition temperature

Which of the following has least mass?

7.0 g of Ag.

2 gram atom of nitrogen

1 mole of S

3 x 10²³atoms of C

Which has largest first ionization energy?

Li

K

Rb

Na

Maximum number of active hydrogens

Methanol

Methane

Glycerol

Acetic acid

Which is the most volatile compound?

HBr

HI

HCl

HF