Question # 1

Mercury does not wet the glass because of

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repulsion

weak cohesive force

high viscosity

capillary action

Proteins are classifies into ______ classes based on physic-chemical properties

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2

3

5

9

The original volume of a gas at 0° is 273 cm³at constant pressure, its volume at 273°C becomes

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zero cm³

546 cm³

446 cm³

346 cm³

∆H=∆E is true for which of the following reaction

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K+H2O----->KOH+H2

N2+3H2------>2NH3

AlCl3+3NaOH--->Al(OH)3+3 NaCl

4Na + O2----->2Na2O

Halogens form halogen acids. HF is the weakest among all of them This is due to the reason that

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fluorine is a very small-sized atom

fluorine is highly electronegative atom

there is strong hydrogen bonding in HF

the polarity of HF bond is less

Based on the physico-chemical properties, proteins may be classified into the following types

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Simple proteins

Compound proteins

Derived proteins

All of the above

Ozone layer is high:

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20-23 km

22-25 km

23-26 km

25-28 km

The mono atomic gas molecules are ______ gas molecules

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Halogen

Zero

Noble

Both b and c

In the body fats are hydrolysed into:

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fatty acid and water

fatty acid

glycerol and water

acid and glycerol

Oceans, rivers, streams, lakes, polar ice caps, glaciers and group water reservoirs are included in:

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atmosphere

lithosphere

hydrosphere

biosphere

Elements in lithosphere exist generally as:

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metals

non-metals

metalloids

minerals

When nitrogen is 5.6 grams in NO₂. then number of moles of NO₂is

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0.5

0.4

0.04

0.05

The heat of formation of graphite and P(white) is ______ KJ/mole

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0.00

-273.0

+8.7

813.99

Alkyl halides on treatment with Zn and HCI gives

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Alkanes

Alkenes

Alkynes

Alcohols

One of the following statements is incorrect

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Actual yeild is always less than the theoretical yield

The formula of a compound is not definite

Law of conservation of mass is applied in stoictiometry

Boyles law is applied in stoichiometry

The fourth period contains elements

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8

16

18

32

The avtive mass of 64 g of HI in a two litre flask would be

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2

1

5

0.25

An ion bearing positive charge is called:

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Cation

Positron

Anion

None of above

Rare earth elements are

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s-block elements

p-block elements

d-block elements

f-block elements

Which of the following is not a fatty acid

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

Basicity of orthoposphoric acid is

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2

3

4

5

I-Chloropropane has two isomers, it is an example of

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Chain isomerism

Position isomerism

Functional group isomerism

Metamerism

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