ICSE chemistry

Sponsor Area

Question
ICSEENICH12029053

Fill in the blanks by choosing the appropriate word / words from those given in the brackets: (benzoic acid, negative, positive, vapour, vapour pressure, benzal chloride, more, less, electropositivity, electronegativity, reducing, oxidising, basic, acidic, PCI5, SOCl2 phenol, water, ice.)

(i) When water freezes to_______the free energy of the system is_______.

(ii) The_________pressure of an aqueous solution of 0.1 M cane sugar is________than that of pure water.

(iii) When benzaldehyde reacts with_______it forms_________and POCl3.

(iv) An aqueous solution of a mixture of ammonium chloride and ammonium hydroxide is a________buffer solution with pH_______than seven.

(v) Halogens are strong_______agents because of their high

Solution

 Ice, (+ve)  , Vapour, less    , PCl5, Benzal chloride , Basic, more , Oxidising, electronegativity

Sponsor Area

Question
ICSEENICH12029054

Complete the following statements by selecting the correct alternative from the choices given:
The hybridization of the iron atom in [Fe(CN)6I-3 complex is:

  • sp3

  • dssp3

  • spsd2

  • dsp2

Solution

B.

dssp3

Question
ICSEENICH12029055

Complete the following statements by selecting the correct alternative from the choices given:
The product formed when aniline is warmed with chloroform and caustic potash is:

  • Phenyl chloride

  • Methyl isocyanide

  • Phenyl isocyanide

  • Nitro phenol

Solution

C.

Phenyl isocyanide

Question
ICSEENICH12029056

Complete the following statements by selecting the correct alternative from the choices given:For a dissociated solute in solution the value of van’t Hoff factor is:

For a dissociated solute in solution the value of van’t Hoff factor is:

 

  • Zero

  • One

  • Greater than one

  • Less than one

Solution

C.

Greater than one

Question
ICSEENICH12029057

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

The unit of equivalent conductance is: 

  • Ohm-1cm2equiv-1

  • Ohm-1cm2gm-1

  • Ohm cm2 equiv-1

  • Ohm-1 mole-1

Solution

A.

Ohm-1cm2equiv-1