Invar, an alloy of Fe and Ni is used in watches and meter scale. Its characteristic property is

• small coefficient of expansion

• resistance of corrosion

• hardness and elasticity

• magnetic nature

An alloy of Pb and Sn in equal proportion is called:

• solder

• constantan

• gun metal

• type metal

Aqua-regia is obtained by mixing two different acids in the ratio :

• 1HNO₃: 3HCl

• 2HNO₃: 2HCl

• 1HNO₃: 2HCl

• 3HNO₃: 1HCl

A compound with cubic structure is made of elements A and B. A atoms are at the corners of the cube and B atoms are at the face centres. The simplest formula of the compound is :

• A₅B

• AB₃

• AB

• AB₆

Colligative properties are used for the determination of :

• molar mass

• equivalent weight

• arrangement of molecules

• melting point and boiling point

Identify the mixture that shows positive deviation from Raoult's law :

• CHCl₃ + (CH₃)₂CO

• (CH₃)₂CO + C₆H₅NH

• CHCl₃ + C₆H₆

• (CH₃)₂CO + CS₂

If ΔG for a reaction is negative, you infer that the change is : 

• spontaneous

• non-spontaneous

• reversible

• irreversible

Zn(s) | Zn²⁺(aq)|| Cu²⁺(aq) | Cu(s) is :

(anode)                        (cathode)

• Weston cell

• Daniel cell

• Faraday cell

• Standard cell

39.

An important industrial solvent, also a laboratory reagent called 2-butanone is nothing but:

• methyl ethyl ketone

• methyl propyl ketone

• dimethyl ketone

• diethyl ketone

The catalyst used for the polymerization of olefins is :

• Ziegler-Natta catalyst

• Wilkinson's catalyst

• Pd-catalys

• Zeise's salt catalyst