MPPSC Scientific Officer Chemistry Paper 2013

MPPSC Scientific Officer Chemistry Paper 2013

Tetracycline exists in blood plasma as complexes of metals. Select the CORRECT metals from the following –
(a) Lithium only
(b) Rubidium and manganese
(c) Sodium only
(d) Calcium and magnesium

The DNA sequencing is written by the use of the following four letters
(a) A, B, C, D
(b) A, C, D, E
(c) A, G, T, C
(d) A, G, H, I

Materials made up of carbon nanotubes are
(a) Extremely light
(b) Extremely heavy
(c) Extremely weak
(d) All of these

Photosynthetic combination of carbon dioxide and water in the presence of chlorophyll is
(a) an exothermic process
(b) an enzymatic process
(c) an endothermic proces
(d) All of these

Nanoparticles of metal oxide is a good adsorbent due to
(a) small size
(b) high density
(c) high surface area
(d) small surface area

Nicotinamide adenine dinucleotide (NAD) is
(a) a rducing agent
(b) a coenzyme
(c) also known as alcohol dehydrogenase
(d) All of the above

Propylene polymerises to produce polypropylene. Which one of the following is suitably matched?\
(a) Isotactic – Methyl groups on both side of extended chain
(b) Syndiotactic – Methyl groups on one side of the extended chain
(c) Atactic – Methyl groups are randomly distributed
(d) Peritactic – Contains one methyl group

When thiphene is treated with conc. sulphuric acid, the principal product is
(a) 3-thiophene sulphate
(b) 3-thiphene sulphonic acid
(c) 3-thiophene sulphonic acid
(d) 2-thiophene sulphonic acid

Which one of the following is suitably matched ?
(a) Monoterpene – Two isoprene unit
(b) Sesquiterpene – One isoprene unit
(c) Triterpene – Three isoprene unit
(d) Diterpene – Six isoprene unit

When ehtylen glycol is oxidised with per iodic acid, it gives
(a) Formic acid
(b) Acetic acid
(c) Formaldehyde
(d) Acetaldehyde

4-ethyl-3-hexanone reacts with ethyl magnesium bromide to give a product which on hydrolysis yields an alcohol which undergoes dehydration with concentrated sulphuric acid to form P. Ozonolysis of P gives 3-pentanone as the only product. What is P ?
(a) 3,4 diethyl hex-3-ene
(b) 4,4-dimethyl hex-2-ene
(c) 3,4-diethyl hexan-3-ol
(d) All of these

In a rearrangement reaction the product formed is always
(a) Optical isomer
(b) Structural isomer
(c) Stereoisomer
(d) Geometrical isomer
of the original compound.

Consider the following statements
Assertion (A) : Benzyl carbanion is more stable than propyl carbanion.
Reason (R) : Propyl carbanion is not stablised by resonance.
Select the correct answer from the following answer codes
(a) Both (A) and (R) are correct
(b) Both (A) and (R) are false
(c) (A) is false but (R) is true
(d) (A) is true but (R) is false

Which one is the correct order of acidity in the following compounds ?
Butanoic acid (I), 2-chlorobutanoic acid (II), 3-chlorobutanoic acid (III)
(a) III < II < I
(b) II < I < III
(c) I < II < III
(d) I < III < II

Select the CORRECT pyridine alkaloid
(a) Quinine
(b) Nicotine
(c) Gramine
(d) All of these