Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

(a)

\(\Delta { G }_{ f }^{ 0 }\) of sulphide is greater than those for CS₂ and H₂S

(b)

\(\Delta { G }_{ r }^{ 0 }\) is negative for roasting of sulphide ore to oxide

(c)

Roasting of the sulphide to its oxide is thermodynamically feasible

(d)

Carbon and hydrogen are suitable reducing agents for metal sulphides

The basic structural unit of silicates is _______.

(a)

\(\left( SiO_{ 3 } \right) ^{ 2- }\)

(b)

\(\left( SiO_{ 4 } \right) ^{ 2- }\)

(c)

\(\left( Sio \right) ^{ - }\)

(d)

\(\left( SiO_{ 4 } \right) ^{ 4- }\)

The basicity of pyrophosphorous acid ( H₄P₂O₅) is _______.

(a)

4

(b)

2

(c)

3

(d)

5

Which of the following compounds is colourless?

(a)

Fe³⁺

(b)

Ti⁴⁺

(c)

Co²⁺

(d)

Ni²⁺

As per IUPAC guidelines, the name of the complex [Co(en)₂(ONO)Cl]Cl is _______.

(a)

chlorobisethylenediaminenitritocobalt(III) chloride

(b)

chloridobis(ethane-1, 2-diamine)nitro  K-Ocobaltate(III) chloride

(c)

chloridobis(ethane-1, 2-diammine)nitrito K-Ocobalt(II) chloride

(d)

chloridobis(ethane-1, 2-diamine)nitrito K-O cobalt(III) chloride

In calcium fluoride, having the flurite structure the coordination number of Ca²⁺ ion and F^- Ion are ________.

(a)

4 and 2

(b)

6 and 6

(c)

8 and 4

(d)

4 and 8

The addition of a catalyst during a chemical reaction alters which of the following quantities?

(a)

Enthalpy

(b)

Activation energy

(c)

Entropy

(d)

Internal energy

What is the decreasing order of strength of bases
OH, NH₂^- H - C ≡ C and CH₃ - CH₂^-

(a)

OH^->NH₂^- >H-C≡C >CH₃^-CH₂^-

(b)

NH₂^->OH^->CH₃^-CH₂^- >H-C≡C

(c)

CH₃^-CH₂^->NH₂^->H-C≡C^->OH^-

(d)

OH^->H-C ≡ C^->CH₃^-CH₂^- >NH₂^-

How many faradays of electricity are required for the following reaction to occur MnO₄^-→ Mn²⁺

(a)

5F

(b)

3F

(c)

1F

(d)

7F

Hair cream is _____.

(a)

gel

(b)

emulsion

(c)

solid sol

(d)

sol.

Which one of the following is the strongest acid.

(a)

2 - nitrophenol

(b)

4 – chlorophenol

(c)

4– nitrophenol

(d)

3 – nitrophenol

The formation of cyanohydrin from acetone is an example of _______.

(a)

nucleophilic substitution

(b)

electrophilic substitution

(c)

electrophilic addition

(d)

Nucleophilic addition

Phenyl methanal is reacted with concentrated NaOH to give two products X and Y. X reacts with metallic sodium to liberate hydrogen X and Y are ________.

(a)

sodium benzoate and phenol

(b)

Sodium benzoate and phenyl methanol

(c)

phenyl methanol and sodium benzoate

(d)

none of these

The product formed by the reaction an aldehyde with a primary amine ________.

(a)

carboxylic acid

(b)

aromatic acid

(c)

schiff ’s base

(d)

ketone

Among the following the achiral amino acid is ______.

(a)

2-ethylalanine

(b)

2-methylglycine

(c)

2-hydroxymethylserine

(d)

Tryptophan

Which of the following are epimers?

(a)

D(+)-Glucose and D(+)-Galactose

(b)

D(+)-Glucose and D(+)-Mannose

(c)

Neither (a) nor (b)

(d)

Both (a) and (b)

Terylene is an example of _______.

(a)

polyamide

(b)

polythene

(c)

polyester

(d)

polysaccharide