Question # 1

An element that is not an essential par of proteins is

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O

N

H

S

If temperature is 73K and volume is 146 cm3 then calculate the value of K=V/T

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5

4

3

2

The incineration may reduce volume of wastes upto:

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1/4th

1/2nd

2/3rd

3/4th

One of the following is not type of polymer

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homopolymer

copolymer

heteropolymer

terpolymer

A solid nitrate fertilizer reacts with an alkali to produce a gas which turns damp pH paper blue:

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NO₃

NHO₃

NH₂O

N₂H₄O₃

Which of the following is the element not present in all proteins

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Carbon

Hydrogen

Nitrogen

Sulphur

Troposphere extends upto km:

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0-15 km

10-15 km

15-40 km

Which of the following reactions are usually slow?

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Neutralization of acids and bases

Displacement Reactions

Organic substitution reaction

Free radical reactions

Photo chemical smog contains ______ as main reactants

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Nitrons oxide and unburnt hydrocarbons

Nilric oxide and unburnt hydrocarbons

No and burnt hydrocarbons

N₂O and burnt hydrocarbons

Which of the following statements is false?

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Avogadro number = 6.02 x 10²¹

The relationship between average velocity (v) and root mean square velocity (u) is v = 0.9213 u

The mean kinetic energy of an ideal gas is independent of the pressure of the gas

The root mean square velocity of the gas can be calculated by the formula (3RT/M)^1/2

Which of the following liquid has highest bolling point

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HCI

HBr

H2O

Br2

Hydrolysis of Grignard's reagent gives:

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Alkane

Alkyl

Halide

Alcohol

The process of osmosis was first discovered by

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Nollet

Pfeffer

Traube

Dutrochet

N₂ + O₂ ⇌2NO

The unit of K_c for tis reaction will be:

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No unit

mol^-2 dm^-3

mol^-1 dm^-3

mol^-2 dm⁺³

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

Which of the following molecules have sp³hybridized carbon

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CH₄

C₂H₄

C₂H₂

CO₂

The addition of HBr is easiest with

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CH2 = CHCl

CICH = CHCl

CH3 - CH = CH2

(CH3)2 C = CH2

Acetamide is prepared by

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Heating ammonium acetate

Heating methyl cyanide

Heating ethyl acetate

The hydrolysis of methyl cyanide

The total number of rare earth elements is

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8

32

14

10

Carbonates of alkali metals dissolves freely in water to form

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Acidic solutions

Neutral solution

Alkaline solution

None of these

In which of these processes are smell organic molecules made into macromolecules?

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The cracking of petroleum fractions

The fractional distillation of crude oil

The polymerization of ethane

The hydrolysis of proteins

Which of the following is the hardest metal among following

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Li

Na

Rb

K

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