MODEL PAPER 3 — Chemistry STD 12 Science — Question

Oxidation state of gold metal is:

The initial concentration of R in the reaction R→P IS 4.62 × 10^-2 mol / L What is the half life for the reaction if k = 2.31 × 10^-2 molL ^-1S^-1

Type of isomerism exhibited by [Cr(NCS)(NH₃​)₅​][ZnCl_4​] is:

Interstitial compounds are formed when small atoms are trapped inside the crystal lattice of metals. Which of the following is not the characteristic property of interstitial compounds?

Magnetic moment of diamagnetic substance in Bohr Magnetons is:

A plant cell shrinks when it is kept in a:

C-Cl bond in chlorobenzene in comparison to C-Cl bond in methyl chloride is:

In which of the following pairs of structures are tetrahedral as well as octahedral voids respectively?

Match the items of column I with appropriate entries of column II.

Column I	Column II
(a) For electrolyte CaSO4	(i) i = 5
(b) For ideal Solution	(ii) i = 2
(c) For electrolyte Al2(SO4)3	(iii) i = 4
(d) For electrolyte Na3PO4	(iv) i = 1

Half life for a Ist order reaction A ⟶ product, is 60 minute. What % of A remains after 120min?