The element that does not form acidic oxide is

• carbon

• phosphorus

• chlorine

• barium

While assigning R, S configuration, the correct order of priority of groups attached to chiral carbon atom is

• CONH₂ > COCH₃ > CH₂OH > CHO

• CONH₂ > COCH₃ > CHO > CH₂OH

• COCH₃ > CH₂OH > CHO > CH₂OH

• CHO > CH₂OH > COCH₃ > CONH₂

How many Faradays of electricity are required to deposit 10g of calcium from molten calcium chloride using inert electrodes? ( Molar mass of calcium = 40g mol^-1)

• 0.5 F

• 1F

• 0.25 F

• 2 F

Name the reagent that is used in leaching of gold.

• Carbon

• Sodium cyanide

• Carbon monoxide

• Iodine

What is the general molecular formula of the product obtained on heating lanthaniods (Ln) with sulphur?

• LnS

• LnS₃

• Ln₃S₂

• Ln₂S₃

In the cell represented by

Pb(s)|Pb²⁺(1M) || Ag⁺(1M)| Ag(s), the reducing agents is

• Pb²⁺

• Pb

• Ag

• Ag⁺

Which metal crystallises in a simple cubic structure?

• Polonium

• Copper

• Nickel

• Iron

Which metal is refined by Mond's process?

• Titanium

• Copper

• Nickel

• Zinc

In face centred cubic unit cell, what is the volume occupied?

• $\frac{4}{3}{\mathrm{\pi r}}^3$

• $\frac{8}{3}{\mathrm{\pi r}}^3$

• $\frac{16}{3}{\mathrm{\pi r}}^3$

• $\frac{64{\mathrm{r}}^3}{3\sqrt{3}}$

20.

How is sodium chromate converted into sodium dichromate in the manufacture of potassium dichromate from chromite ore?

• By the action of concentrated sulphuric acid

• By roasting with soda ash

• By the action of sodium hydroxide

• By the action of limestone