The percentage of carbon in high carbon steel is_________.

(a)

0.5 - 1%

(b)

0.15 - 1.5%

(c)

0.15 - 1.5%

(d)

0.15 - 0.3%

Borax is _______.

(a)

Na₂[B₄O₅(OH)₄).8H₂O

(b)

Na₂[B₄O₅(OH)₆).7H₂O

(c)

Na₂[B₄O₃(OH)₈].6H₂O

(d)

Na₂[B₄O₂(OH)₁₀).5H₂O

The high reactivity of fluorine is due to________.

(a)

high ionisation energy

(b)

low bond dissociation energy

(c)

low electron affinity

(d)

high electro negativity

A mixture of TiCl₄ and trialkyl aluminium is _________

(a)

hydroformylation of obfine

(b)

Zeigler - Natta Catalyst

(c)

interstitial compounds

(d)

ferromagnetic

The oxidation state of the central metal ion in the complex [Co(H₂O)(CN)(en)₂]²⁺ is________.

(a)

0

(b)

+1

(c)

+2

(d)

+3

The correct order of packing efficiency in different types of unit cells is________.

(a)

fcc > bcc > sc

(b)

sc < fcc < bcc

(c)

fcc < bcc > sc

(d)

bcc < fcc < sc

Activation energy of a reactant is reduced by ________.

(a)

increased temperature

(b)

reduced temperature

(c)

increased pressure

(d)

reduced pressure

pH of a solution can be kept constant with the help of __________ solution.

(a)

saturated

(b)

unsaturated

(c)

super saturated

(d)

buffer

For gases, the standard emf depends on _______.

(a)

1 atm pressure

(b)

1M solution

(c)

temperature of 25°C

(d)

both 1atm pressure and temperature of 25°C

Glycerol is used ______.

(a)

as a sweetening agent

(b)

in the manufacture of good quality soap

(c)

in the manufacture of nitro glycerin

(d)

in all the above