PPSC Chemistry Full Book Test With Answers

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PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 Which of the following is an azo dye. Congo red Rhodamine B Ertythroein Paraosaniline
2 Eosin dye belongs to the group of dyes known as. Nitroso syes Triphenylmethane dyes Diphenylmethane dyes Phthalein dyes
3 The dye which is a constituent of Skiffs reagent used for detection formaldehyde group is. Gentain violet Megneta Phenolphthalein Rosolic acid
4 Which of the following is a triphenylmethane dye. Auramine G Crystal violes Fluorescein Fast green O
5 An example of nitro dyes is. Martius yellow Auramine O Malachite green Methyl red
6 Which of the following is not a characteristic of dye. It must have suitable colour It must be able to fix to fibre It must be fast to wash and lights It must be highly soluble in water
7 Dyes which can be applied to cellulosic fibre from water solution are called. Ingrain dyes Substantive dyes Mordant dyes Vat dyes
8 The dyes which are produced on the fibre in suit by reactions are known as. Mordant dyes Fast dyme Ingrain dyes Disperse dyes
9 Vet days are generally applied to the fabric in the form of. Mordants Leuco base Oxidised base Dispersed dyes.
10 A mordants is substance which in Coloured Leuco -base of a dye Fixes dye on the fabric All of these
11 Which of the following is not a naturally occurring dye. Indogo Indigotin Alizarin Malachite green
12 For a compound to act as a dye it must have A suitable colour Ability to fix to fibre Both A and B None of these
13 Conjugation of chromophore Deepens the colour Lightene the colour Shifts absorption to shorter wavelength All of these
14 The light absorbed in UV and visible region causes. Vibrational energy changes Rotational energy changes Electronic excitation All of these
15 An auxochrome is a group which Absorbs in UV region Absorbs in visible region Absorbs in IR region Increase absorption wavelength of chromophore
16 A group that causes deepning of the colour is known as Bathchromic Hypsochromic Hypochromic Hyperchromic
17 A chromophore is an isolated fractional group which has Coloured appearance Absorption in UV visible region Only sigma bonds Absorption in the region
18 An example of acyclic polytropenoid is Myrcone Buna -S Synthetic rubber Natural rubber
19 A terpenoid which as an alcoholic group in the molecule is Citral Camphor Menthol Carvone
20 a- pinene hydrochloride on warming rdarranges to form bornyl chloride.The rearrangement is known as. Pinacol pinacolone Hofinann Wager Mecrwein Wolff
21 Oil of turpentine contains. a-pinene p- pinene Both A and B None of these
22 Peppermint oil contains. Menthol Thymol a-pinene Comphene
23 a-terpioneol is obtained on hydration of which of the following with dilute H2SO4. Citral Myrcene Linalool Limonene
24 Citral when heated with KHSO4 forms. Isoprene p-cymene p-menthane Dipentene
25 The terpenoid present in oil of lemon grass is Citral Geranial Nerol a- terpineol
26 Which of the following is not a characteristics of terpenoids. They are pleasant smelling liquids They are steam volatile They are nitrogenous bases they are insoluble in water
27 Enfleurage process is used to extract the essential oils from Back of plant Seeds of plant Leaves of plant Flowers of plant
28 The terpenoid responsible fo the smell Camphor Genenial Citral Carvone
29 Identify an oxygenated cyclic terpenoid a- pinene Camphor Citral Geranial
30 An example of acrylic monoterpenoid is Dipentene Myocene a- terpineol Limonene
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