Question # 1

How many grams of NaOH are present in 250 cm3 of its 0.2M solution

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,4 g

, 0.4 g

, 10 g

, 2 g

Sugar crystals belong to the system

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cubic

monoclinic

triclinic

orthorhombic

The bonding which occurs among polar covalent molecules containing H and one of the small electronegative element such as O, F or N is called

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bridge bonding

metallic bonding

hydrogen bonding

Ionic bonding

Water which his considered to be safe for human consumption is known as

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distilled water

contaminated water

potable water

rain water

Deposition of cholesterol in arteries is responsible for:

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Heart attach

diabetes

hepatitis

cancer

Which is not an amino acid

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Lysine

Gylcine

Alanine

Aniline

Denaturation of proteins is often characterised by

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Loss of biological activity

Aiways being irreversible

Being ereater the lower the temperature

Changes in primary structure

In addition to many pollutants present in ground water, a successful study was conducted to remove a highly Toxic chemical.What chemical is this

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Cobalt

Nickel

Arsenic

Sulphur

Isozymes are the enzymes which:

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have similar chemical properties

have similar physical properties

have different physical and chemical properties

The 95.5% mass of Lithoshone is made of 11 elements i,e O₂, Si, Al, Fe, Ca, Na, K, Mg, Ti, H₂and P. Which element is present in trace amount

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iodine

bromine

lead

carbon

Keeping in view different factors which affect the melting point of a substance.the compound having melting point among the following is:

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LiCl

NaCl

CsCl

RbCl

The simplest separating unit of a polymer is called:

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Monomer

Dimer

Trimmer

Macromer

Use of glycol as anti freeze in the automobile is an important application of

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Colligative property

Raoult's law

Fractional crystallization

Prrhenivs law

The compound prepared by a substitution reaction of benzene is

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Acetophenone

Glyoxal

Cyclohexame

Hexabromo cyclohexane

Alkyl halides are considered to be very reactive compounds towards nucleophiles because

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They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bad leaving group

They have a nucleophilic carbon and a good leaving group

pH of water is 7, if 0.01 M NaOH is added, than its pH is

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12

14

zero

10

96500 C of electricity liberates from CuSO₄solution

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63.5 g of Cu

31.75 g of Cu

96500 g of Cu

100 g of Cu

Which of the following is fully fluorinated polymer?

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Neoprene

Teflon

Thiokol

PVC

Which of the following is a member of -block

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Zn

Al

B

Br

Products of coal is:

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Peat

Lignite

Bituminous coal

All above

Which of the following is not an element?

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Graphite

Diamond

22-Carat gold

Rhombic sulphur

SN2 reaction can be best carried out with

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Primary alkyl halides

Secondary alkyl halides

Tertiary alkyl halides

All the three

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