ICSE chemistry

Sponsor Area

Question
ICSEENICH12029168

Fill in the blanks by choosing the appropriate word/ words form those given in the brackets:

(Henry's, aldol condensation, absence, do not ohm, Raoult's, increases, common ion effect, easily, three, solubility product, ohm-1, two, four,ohm-1 cm2, cannizzaro, ohm-1 cm-1, zero decreases, presence.)

(i) Ideal solutions obey________ law and they_____ form azetropic mixtures.

(ii) Benzaldehyde undergoes_______ reaction due to _________ of alpha-hydrogen atom.

iii) The solubility of silver chloride ___________ in the presence of sodium chloride because of _______.

iv) The unit of conductance is ___________ and that of specific conductance is ________.

v) When the concentration of a reactant of first order reaction is doubled, the rate becomes _________ times, but for_________ order reaction, the rate remains same.

Solution

Raoult's , easily

,

Cannizzaro, presence

,

increase, common ion effect

,

ohm-1, ohm-1 cm2

,

four, zero

Sponsor Area

Question
ICSEENICH12029169

Complete the following statement by selecting the correct alternative from the choices given:

The complex -ion [Ni(CN)4]2- is:

  • Square planar and diamagnetic

  • Tetrahedral and paramagnetic

  • Square planar and paramagnetic

  • Tetrahedral and diamagnetic

Solution

D.

Tetrahedral and diamagnetic

Question
ICSEENICH12029170

Complete the following statement by selecting the correct alternative from the choices given:

Wohler's synthesis is used for the preparation of:

  • Glycine

  • Amino acids

  • Urea

  • Proteins

Solution

C.

Urea

Question
ICSEENICH12029171

Complete the following statement by selecting the correct alternative from the choices given:

When SO2 gas is passed through acidified K2Cr2O7 solution, the colour of the solution changes to:

  • Red

  • Black

  • Orange

  • Green

Solution

D.

Green

Question
ICSEENICH12029172

Complete the following statement by selecting the correct alternative from the choices given:

In the equation CH3COOH +Cl2 ----> A, the compound A is:

  • CH3CH2Cl

  • ClCH2COOH

  • CH3Cl

  • CH3COCl

Solution

B.

ClCH2COOH