Question # 1

Starch mixture of

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Amylose and xylose

Amylopectin and lactose

Lactose and sucrose

amylose and amylopectin

Ecosystem is smaller units of.

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Lithosphere

Hydrosphere

Atmosphere

Biosphere

Which one is not a meta directing group

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-COOH

-CHO

-COR

-NH₂

Micro nutrients are required in quantity ranging from

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4 g - 40 g

6 g -200 g

6kg - 200 kg

4 kg - 40 kg

The brown gas formed when metal reduces HNO3 is

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N2O5

N2O3

NO2

NO

Which one of the followings is not ore of aluminium

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Coruridum

Bauxite

Colemanite

Kaolin

Which one is not electrophile

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BF3

SO3

AlCl3

NH3

Chemical composition of colemanite is

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Ca₂B₆O₁₁. 5H₂O

CaB₄O₇. 4H₂O

Na₂B₄O₇.4H₂O

CaNaB₅O₉. 8H₂O

----------- compound shows extensive hydrogen bonding with water

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C₂H₆

H₂S

C₂H₅OH

CH₃Cl

Which halogen occurs naturally in a positive oxidation state.

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Fluorine

Chlorine

Bromine

Iodine

In t-butyl alcohol, the tertiary carbon is bonded

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Three hydrogen atoms

Two hydrogen atoms

One hydrogen atom

No hydrogen atom

Which one of the following is co polymer

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PVC

Polyvinyl acetate

Nylon -6,6

Polyethene

The basis of modern periodic table is

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Electron affinity

Atomic mass

Ionization Potential

Atomic number

What type of reaction occurs between ethene and hydrogen.

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Addition

Substitution

Oxidation

Dehydration

Formalin is

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10% solution of formaldehyde in water

20% solution of formaldehyde in water

40% solution of formaldehyde in water

60% solution of formaldehyde in water

A carbohydrate that cannot be acid hydrolysed is called.

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Monosaccharides

Di saccharides

Poly saccharides

Starch

The nitrogen present to some fertilizers helps plants to

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Fight against diseases

Produce fat

Undergo photosynthesis

Produce protein

The temperature in the incineration of industrial and hazardous waste process has a range.

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900 to 1000 ^oC

250 to 500^oC

950 to 1300^oC

500 to 900^oC

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